Flora of Ohio
Encyclopedia
This list includes plants native and introduced to the state of Ohio
, designated (N) and (I), respectively. Varieties and subspecies link to their parent species.
Ohio
Ohio is a Midwestern state in the United States. The 34th largest state by area in the U.S.,it is the 7th‑most populous with over 11.5 million residents, containing several major American cities and seven metropolitan areas with populations of 500,000 or more.The state's capital is Columbus...
, designated (N) and (I), respectively. Varieties and subspecies link to their parent species.
A
- Abies balsamea var. balsamea (N)
- Abutilon theophrastiAbutilon theophrastiAbutilon theophrasti is an annual plant in the family Malvaceae, native to southern Asia. It grows to 1 m tall, and has velvet-like heart-shaped leaves 15–25 cm broad...
(I) - Acalypha deamii (N)
- Acalypha gracilens (N)
- Acalypha ostryifolia (N)
- Acalypha rhomboideaAcalypha rhomboideaAcalypha rhomboidea Acalypha rhomboidea Acalypha rhomboidea ( Common three-seeded mercury, Rhombic three-seeded-mercury, Rhomboid mercury, Copperleaf, Rhombic copper-leaf, Three-seeded-mercury, Ricinelle rhomboide, Diamond threeseed mercury; syn. Acalypha urticifolia Raf., Acalypha virginica L....
(N) - Acalypha virginica (N)
- Acer campestre (I)
- Acer × freemanii (N)
- Acer ginnala (I)
- Acer negundo var. negundoAcer negundoAcer negundo is a species of maple native to North America. Box Elder, Boxelder Maple, and Maple Ash are its most common names in the United States...
(N) - Acer negundo var. violaceumAcer negundoAcer negundo is a species of maple native to North America. Box Elder, Boxelder Maple, and Maple Ash are its most common names in the United States...
(N) - Acer nigrum (N)
- Acer palmatumAcer palmatumAcer palmatum, called Japanese Maple or Smooth Japanese Maple is a species of woody plant native to Japan, North Korea, South Korea, China, eastern Mongolia, and southeast Russia. Many different cultivars of this maple have been selected and they are grown worldwide for their attractive leaf...
(I) - Acer pensylvanicum (N)
- Acer platanoides (I)
- Acer rubrum var. rubrum (N)
- Acer rubrum var. trilobum (N)
- Acer saccharinum (N)
- Acer saccharum var. saccharum (N)
- Acer spicatum (N)
- Acer tataricum (I)
- Achillea millefolium var. occidentalis (N)
- Achillea millefolium var. millefolium (I)
- Achillea ptarmica (I)
- Achyranthes japonica var. hachijoensis (I)
- Acinos arvensisAcinos arvensisAcinos arvensis, also known as the Basil thyme, is a species of plant of the genus Acinos.It is a perennial that usually grows about 8 inches high and spreads 12 inches. It prefers to grow in strong sunlight.The delicate scent of it is faintly reminiscent of thyme, giving it its common name....
(I) - Aconitum noveboracenseAconitum noveboracenseAconitum noveboracense, also known as Northern Blue Monkshood or Northern Wild Monkshood, is a flowering plant belonging to the buttercup family . Members of its genus are also known as wolfsbane....
(N) - Aconitum uncinatum ssp. uncinatum (N)
- Acorus americanusAcorus americanusAcorus americanus, the American Sweet Flag, is an emergent wetland plant native to the northern United States and Canada. This perennial plant has bright green blade-shaped leaves that arising directly from the rhizomes and sheath into each other at the base. Additionally the blades have 2-6 raised...
(N) - Acorus calamus (I)
- Acroptilon repens (I)
- Actaea pachypodaActaea pachypodaActaea pachypoda is a flowering plant in the family Ranunculaceae, native to eastern North America....
(N) - Actaea racemosa var. racemosa (N)
- Actaea rubra ssp. rubra (N)
- Actinidia arguta (I)
- Adiantum capillus-venerisAdiantum capillus-venerisAdiantum capillus-veneris, the Southern maidenhair fern, black maidenhair fern, and venus hair fern, is a species of fern in the genus Adiantum with a subcosmopolitan worldwide distribution...
(N) - Adiantum pedatumAdiantum pedatumAdiantum pedatum is a maidenhair fern native to moist woodland in eastern North America.Adiantum aleuticum was once considered a subspecies...
(N) - Adlumia fungosa (N)
- Aegilops cylindricaAegilops cylindricaAegilops cylindrica, also known as jointed goatgrass. is an annual grass seed that is part of the tribe Triticeae, along with wheat and some other cereals . It is not native to the United States, however it has become a serious issue as a weed since it was introduced in the late 19th century . Due...
(I) - Aegopodium podagraria (I)
- Aesculus flava (N)
- Aesculus glabra var. glabra (N)
- Aesculus hippocastanum (I)
- Aesculus × marylandica (N)
- Aethusa cynapium (I)
- Agalinis auriculata (N)
- Agalinis gattingeri (N)
- Agalinis paupercula var. borealis (N)
- Agalinis paupercula var. paupercula (N)
- Agalinis purpurea (N)
- Agalinis skinneriana (N)
- Agalinis tenuifolia var. macrophylla (N)
- Agalinis tenuifolia var. parviflora (N)
- Agalinis tenuifolia var. tenuifolia (N)
- Agastache nepetoides (N)
- Agastache scrophulariifolia (N)
- Ageratina altissima var. altissima (N)
- Ageratina aromatica var. aromatica (N)
- Agrimonia eupatoriaAgrimonia eupatoriaAgrimonia eupatoria is a species of agrimony that is often referred to as common agrimony, church steeples or sticklewort....
(I) - Agrimonia gryposepalaAgrimonia gryposepalaAgrimonia gryposepala is a small flowering plant of the rose family , which is native to North America and was used by various indigenous peoples to treat medical problems such as diarrhea and fever.-Name and description:Agrimonia gryposepala Agrimonia gryposepala (also known as Tall hairy...
(N) - Agrimonia microcarpa (N)
- Agrimonia parvifloraAgrimonia parvifloraAgrimonia parviflora is a species of perennial herbaceous flowering plants. Small Flowered Agrimony,Harvestlice Agrimony, and Harvestlice are its most common names in the United States....
(N) - Agrimonia pubescens (N)
- Agrimonia rostellata (N)
- Agrimonia striataAgrimonia striataAgrimonia striata is a species of perennial forb belonging to the Rose family . It grows to about 40in. producing a dense cluster of 5-parted yellow flowers on a hairy stalk above pinnately-divided leaves...
(N) - Agropyron desertorumAgropyron desertorumAgropyron desertorum is a species in the Poaceae family.-External links:***...
(I) - Agrostemma githago (I)
- Agrostis avenaceaAgrostis avenaceaAgrostis avenacea is a species of grass known by the common names Pacific bent grass and New Zealand wind grass. It is native to Australia, New Zealand, and other Pacific Islands including New Guinea and Easter Island....
(I) - Agrostis capillarisAgrostis capillarisAgrostis capillaris is a rhizomatous and stoloniferous perennial in the grass family . It is native to Eurasia and has been widely introduced in many parts of the world...
(I) - Agrostis elliottianaAgrostis elliottianaAgrostis elliottiana is a species of grass known by the common name Elliott's bent grass.-Distribution:It is a bunchgrass native to various parts of North America in disjunct locations, including north-central California, southwestern and southeastern United States, and Yucatán in...
(N) - Agrostis giganteaAgrostis giganteaAgrostis gigantea, known by its common name Redtop, is a perennial grass of the Agrostis genus.It is native to Europe, but in the cooler areas of North America was widely used as a pasture grass until the 1940s. Although it has largely been replaced by soybeans and more palatable grasses, it still...
(I) - Agrostis hyemalis (N)
- Agrostis perennansAgrostis perennansAgrostis perennans is species of grass in the Poaceae family.-Description:...
(N) - Agrostis scabraAgrostis scabraAgrostis scabra is a common species of grass known by the common names rough bent grass and ticklegrass. A tumbleweed, it is native to much of North America, and widely known elsewhere as an introduced species. It occurs in most of the United States except parts of the Southeast and most of...
(N) - Agrostis stoloniferaAgrostis stoloniferaAgrostis stolonifera is a perennial grass species in the Poaceae family. It is stoloniferous and may form mats or tufts...
(I) - Ailanthus altissima (I)
- Aira caryophyllea var. caryophylleaAira caryophylleaAira caryophyllea is a species of grass known by the common name silver hairgrass. This is a species which is native to Europe but has been introduced to other continents, including North America, where it is naturalized and common. This is a light green grass which has a silvery sheen on its...
(I) - Ajuga genevensisAjuga genevensisAjuga genevensis is a herbaceous flowering plant native to Europe...
(I) - Ajuga reptansAjuga reptansAjuga reptans, commonly known as Blue bugle, Bugleherb, Bugleweed, Carpetweed, Carpet Bungleweed, Common bugle, or Burgundy lace, is an herbaceous flowering plant native to Europe. This plant is often used as an ornamental plant. It is invasive in parts of North America.-Description:The bugle has...
(I) - Akebia quinataAkebia quinataAkebia quinata is a shrub that is native to Japan, China and Korea.It grows to 10 metres or more in height and has compound leaves with five leaflets. The inflorescences are clustered in racemes and are chocolate-scented, with three or four sepals. The fruits are sausage-shaped pods which contain...
(I) - Albizia julibrissinAlbizia julibrissinAlbizia julibrissin is a species of legume in the genus Albizia, native to southwestern and eastern Asia, from Persia east to China and Korea...
(I) - Alcea roseaAlcea roseaAlcea rosea is an ornamental plant in the Malvaceae family....
(I) - Aletris farinosa (N)
- Alisma subcordatumAlisma subcordatumAlisma subcordatum is a perennial aquatic plant in the Water-plantain family . This plant grows to about 3 feet in height with lance to oval shaped leaves rising from bulbous corms with fibrous roots. Any leaves that form underwater are weak and quick to rot; they rarely remain on adult plants...
(N) - Alisma trivialeAlisma trivialeAlisma triviale is a perennial semi-aquatic or aquatic plant in the Water-plantain family . It grows in shallow water or mud. Northern water plantain is native to Canada, the United States, and Northern Mexico....
(N) - Alliaria petiolata (I)
- Allium ampeloprasumAllium ampeloprasumAllium ampeloprasum is a member of the onion genus Allium. The wild plant is commonly known as Wild Leek - not to be confused with the N. American Allium tricoccum of the same name. Its native range is S. Europe to W...
(I) - Allium burdickiiAllium burdickiiAllium burdickii is a plant that is native to fertile soils of woods in North America. The onion flavored bulbs and leaves of this plant are edible....
(N) - Allium canadense var. canadenseAllium canadenseWild onion , also known as Canada onion, wild garlic, meadow garlic, and Canadian garlic, is a perennial plant native to North America. It has an edible bulb covered with a dense skin of brown fibers and tastes like an onion. The plant also has strong, onion-like odor...
(N) - Allium cepa (I)
- Allium cernuum var. cernuumAllium cernuumAllium cernuum, known as nodding onion and lady's leek, is a perennial plant in the genus Allium.It has an unsheathed slender conic bulb which gradually tapers directly into several keeled grass-like leaves . Each mature bulb bears a single flowering stem, which terminates in a downward nodding...
(N) - Allium porrum (I)
- Allium sativum (I)
- Allium schoenoprasum (I)
- Allium schoenoprasum var. sibiricum (N)
- Allium tricoccum (N)
- Allium vineale ssp. vinealeAllium vinealeAllium vineale is a perennial bulbflower in the genus Allium, native to Europe, north Africa and western Asia. The species was introduced in Australia and North America, where it has become an invasive species....
(I) - Alnus × fallacina (N)
- Alnus glutinosa (I)
- Alnus incana ssp. rugosa (N)
- Alnus serrulataAlnus serrulataAlnus serrulata, the hazel alder,or smooth alder is a thicket-forming shrub in the family Betulaceae. It is native to eastern North America and can be found found from western Nova Scotia and southern New Brunswick south to Florida and Texas....
(N) - Alopecurus aequalis var. aequalisAlopecurus aequalisAlopecurus aequalis is a common species of grass known by the common name shortawn foxtail.It is native to much of the temperate Northern Hemisphere from Eurasia to North America, where it can be found in many types of habitat.-Description:...
(N) - Alopecurus carolinianusAlopecurus carolinianusAlopecurus carolinianus is a species of grass known by the common names Carolina foxtail and tufted foxtail.It is native to much of North America, including most of the United States and western Canada. It may be an introduced species in many areas, however...
(N) - Alopecurus geniculatus var. geniculatusAlopecurus geniculatusAlopecurus geniculatus is a species of grass known by the common name water foxtail or Marsh foxtail.It is native to much of Eurasia and North America, where it grows in moist areas. This is a perennial grass forming bunches of erect stems up to about 60 centimeters in maximum height. The leaves...
(I) - Alopecurus myosuroidesAlopecurus myosuroidesAlopecurus myosuroides is an annual grass, found on cultivated and waste land. It is also known as Slender Meadow Foxtail, Black-Grass, Twitch Grass, Black Twitch.-Description:...
(I) - Alopecurus myosuroidesAlopecurus myosuroidesAlopecurus myosuroides is an annual grass, found on cultivated and waste land. It is also known as Slender Meadow Foxtail, Black-Grass, Twitch Grass, Black Twitch.-Description:...
(N) - Alopecurus pratensis (I)
- Althaea officinalisAlthaea officinalisAlthaea officinalis is a species indigenous to Africa, which is used as a medicinal plant and ornamental plant...
(I) - Alyssum alyssoidesAlyssum alyssoidesAlyssum alyssoides is a species of flowering plant in the mustard family known by several common names, including pale madwort and yellow alyssum...
(I) - Amaranthus albusAmaranthus albusAmaranthus albus is an annual species of flowering plant. It is native to the tropical Americas but a widespread introduced species in other places, including Europe, Africa, and Australia...
(I) - Amaranthus blitoidesAmaranthus blitoidesAmaranthus blitoides, commonly called Prostrate amaranth, Matweed, or Mat amaranth, is a glabrous annual plants species. It usually grows up to 0.6 m, though it may grow up to 1 m...
(I) - Amaranthus blitum var. emarginatusAmaranthus blitumAmaranthus blitum, commonly called purple amaranth is an annual plant species in economically important plant family Amaranthaceae....
(I) - Amaranthus cruentusAmaranthus cruentusAmaranthus cruentus is a common flowering plant species that yields the nutritious staple amaranth grain. It is one of three Amaranthus species cultivated as a grain source, the other two being Amaranthus hypochondriacus and Amaranthus caudatus...
(I) - Amaranthus deflexusAmaranthus deflexusAmaranthus deflexus is also known by the common names large-fruit amaranth, low amaranth, and Argentina amaranth, since it is native to South America. It is a short-lived perennial or annual plant. The plant can grow up to 1.5 ft in height.It flowers in the summer to fall, and was introduced...
(I) - Amaranthus hybridusAmaranthus hybridusAmaranthus hybridus, commonly called Smooth Amaranth, Smooth Pigweed, Red Amaranth, or Slim Amaranth, is a species of annual flowering plant. It is a weedy species found now over much of North America and introduced into Europe and Eurasia.-Description:A. hybridus grows from a short taproot and can...
(N) - Amaranthus palmeriAmaranthus palmeriAmaranthus palmeri is a species of edible flowering plant in the amaranth genus. It has several common names, including Palmer's amaranth, Palmer amaranth, Palmer's pigweed, and carelessweed. It is native to most of the southern half of North America. Populations in the eastern United States are...
(N) - Amaranthus powellii ssp. powelliiAmaranthus powelliiAmaranthus powellii is a species of amaranth known by the common names Powell's amaranth and green amaranth. It is native to the southwestern United States and northern Mexico, but it is common throughout most of the rest of the temperate Americas as a naturalized species. It has also been...
(N) - Amaranthus retroflexusAmaranthus retroflexusAmaranthus retroflexus is a species of flowering plant in the Amaranthaceae family with several common names, including Red-root Amaranth, Redroot Pigweed, Red Rooted Pigweed, Common Amaranth, and common tumble weed....
(N) - Amaranthus spinosusAmaranthus spinosusAmaranthus spinosus, commonly known as the spiny amaranth, prickly amaranth or thorny amaranth. It is native to the tropical Americas, but it is present on most continents as an introduced species and sometimes a noxious weed. It can be a serious weed of rice cultivation in Asia...
(N) - Amaranthus tuberculatusAmaranthus tuberculatusAmaranthus tuberculatus, commonly known as tall waterhemp or roughfruit amaranth, is a species of flowering plant. It is a summer annual broadleaf with a germination period that lasts several months...
(N) - Ambrosia artemisiifolia var. elatiorAmbrosia artemisiifoliaAmbrosia artemisiifolia, Common Ragweed, is the most widespread plant of the genus Ambrosia in North America. It has also been called Annual Ragweed, Bitterweed, Blackweed, Carrot Weed, Hay Fever Weed, Roman Wormwood, Stammerwort, Stickweed, Tassel Weed, and American Wormwood...
(N) - Ambrosia artemisiifolia var. elatiorAmbrosia artemisiifoliaAmbrosia artemisiifolia, Common Ragweed, is the most widespread plant of the genus Ambrosia in North America. It has also been called Annual Ragweed, Bitterweed, Blackweed, Carrot Weed, Hay Fever Weed, Roman Wormwood, Stammerwort, Stickweed, Tassel Weed, and American Wormwood...
(I) - Ambrosia bidentata (N)
- Ambrosia × helenae (N)
- Ambrosia trifida var. trifidaAmbrosia trifidaCommon names: Buffalo Weed, Great Ragweed, Giant Ragweed, Bitterweed, Bloodweed, Horse Cane, Tall AmbrosiaAmbrosia trifida is an annual plant in the aster family, native throughout much of North America. Its flowers are green and are pollinated by wind rather than by insects, and the pollen is one...
(N) - Amelanchier arborea var. arborea (N)
- Amelanchier interiorAmelanchier interiorAmelanchier interior is type of serviceberry shrub. It produces a sweet tasting edible fruit called a pome, which can be eaten raw or cooked. The fruit has a sweet flavor. This species is a deciduous tree....
(N) - Amelanchier laevisAmelanchier laevisAmelanchier laevis is a small tree, growing up to 9m. The fruit, which are pomes, are edible and can be eaten raw or cooked. The fruit has a sweet flavor. The bark can be made into a herbal medicine for expectant mothers. It is a deciduous tree...
(N) - Amelanchier sanguinea var. sanguineaAmelanchier sanguineaAmelanchier sanguinea, known as red-twigged shadbush or roundleaf serviceberry, is a shrub native to eastern North America. It can grow up to 3 metres tall, and has edible sweet-flavored fruits that are red when young and become purple or dark-blue when they ripen. Like all Amelanchier fruit, these...
(N) - Amelanchier stolonifera (N)
- Ammannia coccineaAmmannia coccineaAmmannia coccinea is a species of flowering plant in the loosestrife family known by several common names, including valley redstem, scarlet toothcup, and purple ammannia. It is native to most of the contiguous United States, with the exception of the Pacific Northwest and New England. It is...
(N) - Ammannia robustaAmmannia robustaAmmannia robusta is a species of flowering plant in the loosestrife family known by the common name grand redstem. It is native to most of western and central North America, where it grows in moist places, such as ditches and pond margins. It is an annual herb reaching about a meter in maximum...
(N) - Ammophila breviligulataAmmophila breviligulataAmmophila breviligulata is a species of grass that is native to eastern North America, where it grows on sand dunes along the Atlantic Ocean and Great Lakes coasts...
(N) - Amorpha fruticosaAmorpha fruticosaAmorpha fruticosa is a species of flowering plant in the legume family known by several common names, including desert false indigo and bastard indigobush. It is found throughout eastern Canada, northern Mexico, and most of the continental United States, but it is probably naturalized in western...
(N) - Ampelopsis aconitifolia (I)
- Ampelopsis arboreaAmpelopsis arboreaAmpelopsis arborea, commonly known as Pepper vine, is native to the Southeastern United States, Texas, and New Mexico.-Synonyms:Its synonyms include: Ampelopsis bipinnata Michx., Ampelopsis pinnata DC., Cissus arborea Des Moul., Cissus bipinnata Elliott, Cissus orientalis Lam., Cissus stans...
(N) - Ampelopsis brevipedunculataAmpelopsis brevipedunculataAmpelopsis brevipedunculata , the porcelain berry, is an ornamental plant, native to temperate areas of Asia...
(I) - Ampelopsis cordata (N)
- Amphiachyris dracunculoides (N)
- Amphicarpaea bracteata var. bracteataAmphicarpaea bracteataAmphicarpaea bracteata is an annual to perennial vine in the legume family, native to woodland, thickets, and moist slopes in eastern North America.-Description:Leaves have three leaflets and are held alternately on twining stems....
(N) - Amphicarpaea bracteata var. comosaAmphicarpaea bracteataAmphicarpaea bracteata is an annual to perennial vine in the legume family, native to woodland, thickets, and moist slopes in eastern North America.-Description:Leaves have three leaflets and are held alternately on twining stems....
(N) - Amsinckia lycopsoidesAmsinckia lycopsoidesAmsinckia lycopsoides is a species of fiddleneck known by the common name tarweed fiddleneck. It is one of the more common species of fiddleneck. It is native to much of western North America from California to British Columbia. It can be found in a wide variety areas.-Description:Amsinckia...
(N) - Amsonia tabernaemontana var. salicifolia (N)
- Anagallis arvensis ssp. foemina (N)
- Anagallis arvensis ssp. arvensis (I)
- Anagallis arvensis ssp. foemina (I)
- Anagallis minimaAnagallis minimaAnagallis minima is a 1-4 inch perennial herb in the Myrsine family . A native of Europe, this small plant has been widely naturalized elsewhere. It can be found growing in moist soils and seasonal pools....
(N) - Anaphalis margaritaceaAnaphalis margaritaceaAnapahlis margaritacea, commonly known as the Western Pearly Everlasting, is a perennial herb in the composite family. Since it is the only North American species it is often simply called Pearly Everlasting in the United States and Canada. However, it is also native in Asia and has been widely...
(N) - Anchusa arvensisAnchusa arvensisAnchusa arvensis is a plant species of the genus Anchusa. Its common names include small bugloss and annual bugloss. This is a hairy annual herb which may reach one half to one meter in height. It bears small blue tubular flowers, four nutlets per flower, and one seed per nutlet...
(I) - Anchusa azureaAnchusa azureaAnchusa azurea is a species of flowering plant known by the common name Italian bugloss. It is a bristly perennial which reaches just over half a meter in height. It has straight lance-shaped leaves and petite tubular flowers of bright violet-blue. This species is native to Europe and western Asia...
(I) - Anchusa officinalisAnchusa officinalisAnchusa officinalis or Common Bugloss or Alkanet is a plant species of the genus Anchusa....
(I) - Andromeda polifolia var. glaucophylla (N)
- Andropogon gerardii (N)
- Andropogon glomeratus var. glomeratusAndropogon glomeratusAndropogon glomeratus is a species of grass known by the common names bushy bluestem and bushy beardgrass. This grass reaches heights approaching two meters-6 feet and has large, fluffy cream-colored inflorescences. Each dense, tufted inflorescence has several pairs of hairy spikelets. The leaves...
(N) - Andropogon gyrans var. gyrans (N)
- Andropogon virginicus var. virginicusAndropogon virginicusAndropogon virginicus is a species of grass known by several common names, including broomsedge bluestem and yellowsedge bluestem. It is native to the southeastern United States and as far north as the Great Lakes. It is known as an introduced species in California and Hawaii, where it is...
(N) - Androsace occidentalisAndrosace occidentalisAndrosace occidentalis is a species of flowering plant in the primrose family known by the common name western rockjasmine. It is native to much of southern Canada and the central United States, where it occurs in open habitat such as prairie, especially in moist areas. This is a diminutive annual...
(N) - Anemone blandaAnemone blandaAnemone blanda is a tuberous perennial valued for its daisy-like spring-blooming flowers, native to southeastern Europe, Turkey, Lebanon, and Syria.-External links:**...
(I) - Anemone canadensisAnemone canadensisAnemone canadensis is a herbaceous perennial native to moist meadows, thickets, streambanks, and lakeshores in North America, spreading rapidly by underground rhizomes, valued for its white flowers.-Description:Shoots with deeply divided and toothed basal leaves grow from caudices on long,...
(N) - Anemone cylindricaAnemone cylindricaAnemone cylindrica is a very upright growing, clump forming herbaceous plant species in the genus Anemone and family Ranunculaceae. Plants grow 30 to 100 cm tall, flowering early summer but often found flowering till late summer, the flowers are greenish-white. After flowering the fruits are...
(N) - Anemone quinquefolia var. bifoliaAnemone quinquefoliaAnemone quinquefolia is an early-spring flowering plant in the genus Anemone, native to North America. It is commonly called Wood Anemone, like Anemone nemorosa, a closely related European species...
(N) - Anemone quinquefolia var. quinquefoliaAnemone quinquefoliaAnemone quinquefolia is an early-spring flowering plant in the genus Anemone, native to North America. It is commonly called Wood Anemone, like Anemone nemorosa, a closely related European species...
(N) - Anemone virginiana var. virginianaAnemone virginianaAnemone virginiana is an upright growing herbaceous plant species in the genus Anemone and family Ranunculaceae. Plants grow 30 to 80 cm tall, flowering early summer but often found flowering till late summer, the flowers are white or greenish-white...
(N) - Anethum graveolens (I)
- Angelica atropurpureaAngelica atropurpureaAngelica atropurpurea is a species of plant that can be found in moist and swampy woodlands, mostly by riverbanks. The plant grows to 6 feet tall with an erect branching stem that is purple. The stem is smooth, hollow, and sturdy. The leaves are divided into three parts, each with its own petiole....
(N) - Angelica venenosa (N)
- Anoda cristataAnoda cristataAnoda cristata is a species of flowering plant in the mallow family known by many common names, including spurred anoda, crested anoda, and violettas. Its exact native range is unclear but it probably spans Mexico and part or all of Central America. It is known throughout the rest of the Americas...
(N) - Antennaria howellii ssp. canadensisAntennaria howelliiAntennaria howellii is a species in the genus Antennaria, native to northern North America from Alaska east to Newfoundland, and south to northern California, Colorado and North Carolina....
(N) - Antennaria howellii ssp. neodioicaAntennaria howelliiAntennaria howellii is a species in the genus Antennaria, native to northern North America from Alaska east to Newfoundland, and south to northern California, Colorado and North Carolina....
(N) - Antennaria howellii ssp. petaloideaAntennaria howelliiAntennaria howellii is a species in the genus Antennaria, native to northern North America from Alaska east to Newfoundland, and south to northern California, Colorado and North Carolina....
(N) - Antennaria neglecta (N)
- Antennaria parlinii ssp. fallax (N)
- Antennaria parlinii ssp. parlinii (N)
- Antennaria plantaginifolia (N)
- Antennaria solitaria (N)
- Antennaria virginica (N)
- Anthemis arvensisAnthemis arvensisAnthemis arvensis, which is also known as corn chamomile or mayweed, scentless chamomile, and # field chamomile, anthémis des champs, fausse camomille, Ackerkamille, camomila-do-campo , manzanilla silvestre is a species of the genus Anthemis and in the Asteraceae family...
(I) - Anthemis cotulaAnthemis cotulaAnthemis cotula, also known as stinking chamomile, is a flowering annual plant with a noticeable and strong odor. The odor is often considered unpleasant, and it is from this that it gains the common epithet "stinking". It is initially native to Europe and North Africa...
(I) - Anthemis tinctoriaAnthemis tinctoriaCota tinctoria, or Golden Marguerite and Yellow Chamomile, is a species in the genus Anthemis of the Sunflower family ....
(I) - Anthoxanthum aristatumAnthoxanthum aristatumAnthoxanthum aristatum is a species of grass known by the common name annual vernalgrass. It is native to North Africa and southern Europe as far north as France, and it is known in other regions, including northern Europe and North America, as an introduced species. It is occasionally a minor weed...
(I) - Anthoxanthum odoratum ssp. odoratumAnthoxanthum odoratum-Introduction:Anthoxanthum odoratum, known as sweet vernal grass, holy grass, vanilla grass or buffalo grass, is a short-lived grass found wild in acidic grassland in Eurasia. It is also grown as a lawn grass and a house plant, due to its sweet scent, and can also be found on unimproved pastures...
(I) - Anthriscus caucalisAnthriscus caucalisA plant of the carrot family, Anthriscus caucalis is known by the common name burr chervil or bur-chervil. It is similar in appearance to the common cooking herb from the same genus, chervil. It sends up thin, hollow stems and bears umbels of white flowers. The light green leaves are triangular and...
(I) - Anthriscus sylvestris (I)
- Anthyllis vulnerariaAnthyllis vulnerariaAnthyllis vulneraria is a medicinal plant native to Europe. The name vulneraria means "wound healer".-Description:...
(I) - Antirrhinum majusAntirrhinum majusAntirrhinum majus is a species of plants belonging to the genus Antirrhinum...
(I) - Apera interrupta (I)
- Apera spica-venti (I)
- Apios americanaApios americanaApios americana, sometimes called the potato bean, hopniss, Indian potato or groundnut is a perennial vine native to eastern North America, and bears edible beans and large edible tubers. It grows to 3–4 m long, with pinnate leaves 8–15 cm long with 5–7 leaflets...
(N) - Apium graveolens var. dulce (N)
- Apium graveolens var. dulce (I)
- Aplectrum hyemaleAplectrum hyemaleAplectrum hyemale is a species of orchids and the sole species of the genus Aplectrum. The generic name comes from Greek and signifies "spurless"...
(N) - Apocynum androsaemifoliumApocynum androsaemifoliumApocynum androsaemifolium is a flowering plant. Milky sap appears on broken stems. Leaf margin is entire and leaf veination is alternate. Its leaves appear as pointed ovals, while...
(N) - Apocynum cannabinumApocynum cannabinumApocynum cannabinum is a perennial herbaceous plant that grows throughout much of North America - in the southern half of Canada and throughout the United States. It is a poisonous plant: Apocynum means "poisonous to dogs"...
(N) - Apocynum × floribundum (N)
- Aquilegia canadensis (N)
- Aquilegia vulgarisAquilegia vulgarisAquilegia vulgaris is a species of columbine native to Europe.- Description :It is a herbaceous perennial plant growing to 1.2 m tall, with branched, thinly hairy stems...
(I) - Arabidopsis thalianaArabidopsis thalianaArabidopsis thaliana is a small flowering plant native to Europe, Asia, and northwestern Africa. A spring annual with a relatively short life cycle, arabidopsis is popular as a model organism in plant biology and genetics...
(I) - Arabis canadensis (N)
- Arabis × divaricarpa (N)
- Arabis drummondii (N)
- Arabis glabraArabis glabraArabis glabra, or tower mustard, is a tall, slim, grey-green plant with small creamy flowers at the top of the stem. It usually grows on poor chalky or sandy soils, in open situations. It is native to Europe, Asia, and North Africa, and it is widespread in North America where it is also probably...
(N) - Arabis hirsuta var. pycnocarpaArabis hirsutaArabis hirsuta is a flowering plant of the genus Arabis in the family Brassicaceae. It is native to Europe, Asia, and the northern half of North America.-External links:****...
(N) - Arabis laevigata var. laevigata (N)
- Arabis lyrata (N)
- Arabis missouriensis (N)
- Arabis patens (N)
- Arabis shortii (N)
- Aralia elataAralia elataAralia elata or Japanese Angelica-tree is a woody plant belonging to the Aralia family .-Description:It is an upright deciduous small tree or shrub growing up to 6 m in height, native to eastern Russia, China, Korea, and Japan....
(I) - Aralia hispida (N)
- Aralia nudicaulisAralia nudicaulisAralia nudicaulis is a flowering plant of northern and eastern North America which reaches a height of 1–2 feet with creeping underground stems.In the spring the underground stems produce compound leaves that are large...
(N) - Aralia racemosa ssp. racemosaAralia racemosaAralia racemosa is an ornamental plant in the Araliaceae family native to the United States and Canada. It is a herbaceous plant, about one to two meters tall, which grows in shady areas. Its native range includes most of the eastern United States.-External links:**...
(N) - Aralia spinosaAralia spinosaAralia spinosa, commonly known as Devil's Walkingstick, is a woody species of plants in the genus Aralia, family Araliaceae, native to eastern North America. The various names refer to the viciously sharp, spiny stems, petioles, and even leaf midribs...
(N) - Arctium lappa (I)
- Arctium minus (I)
- Arctostaphylos uva-ursiArctostaphylos uva-ursiArctostaphylos uva-ursi, with names for this species including Kinnikinnick and Pinemat manzanita, one of several related species referred to as Bearberry...
(N) - Arenaria serpyllifoliaArenaria serpyllifoliaArenaria serpyllifolia or Thyme-leaved Sandwort is a plant in the family Caryophyllaceae....
(I) - Arethusa bulbosa (N)
- Argemone albiflora ssp. albiflora (N)
- Argemone mexicanaArgemone mexicanaArgemone mexicana is a species of poppy found in Mexico and now widely naturalized in the United States, India and Ethiopia...
(N) - Argentina anserina (N)
- Arisaema dracontiumArisaema dracontiumArisaema dracontium is a herbaceous perennial plant in the genus Arisaema and the family Araceae. It is native to North America from Quebec to Minnesota South to Florida and Texas, where it is found growing in damp woods. Plants grow 20–50 cm tall when in bloom and after flowering reach...
(N) - Arisaema triphyllum ssp. pusillumArisaema triphyllumArisaema triphyllum is a herbaceous perennial plant growing from a corm. It is a highly variable species typically growing from 30 to 65 cm in height with three parted leaves and flowers contained in a spadix that is covered by a hood...
(N) - Arisaema triphyllum ssp. stewardsoniiArisaema triphyllumArisaema triphyllum is a herbaceous perennial plant growing from a corm. It is a highly variable species typically growing from 30 to 65 cm in height with three parted leaves and flowers contained in a spadix that is covered by a hood...
(N) - Arisaema triphyllum ssp. triphyllumArisaema triphyllumArisaema triphyllum is a herbaceous perennial plant growing from a corm. It is a highly variable species typically growing from 30 to 65 cm in height with three parted leaves and flowers contained in a spadix that is covered by a hood...
(N) - Aristida dichotoma var. dichotoma (N)
- Aristida longespica var. geniculata (N)
- Aristida longespica var. longespica (N)
- Aristida oliganthaAristida oliganthaAristida oligantha is a species of grass known by the common names prairie threeawn and oldfield threeawn.It is native to the United States and southern Canada, and it is known from northern Mexico. It is a grass of many types of habitat, and it grows easily in dry areas with sandy or gravelly soils...
(N) - Aristida purpurascens var. purpurascens (N)
- Aristida ramosissima (N)
- Aristolochia clematitisAristolochia clematitisAristolochia clematitis, Birthwort, is a twining herbaceous plant in the Aristolochiaceae family, which is native to Europe. The leaves are heart shaped and the flowers are pale yellow and tubular in form...
(I) - Aristolochia serpentariaAristolochia serpentariaAristolochia serpentaria is a species of perennial flowering plant in the Aristolochiaceae family. The species is commonly known as Virginia snakeroot and is native to eastern North America, from Connecticut to southern Michigan and south to Texas and Florida.-Protection:Virginia snakeroot is...
(N) - Aristolochia tomentosaAristolochia tomentosaAristolochia tomentosa is a species of flowering plant in the Aristolochiaceae family.-References:*C. Neinhuis, S. Wanke1, K. W. Hilu, K. Müller and T. Borsch, . Phylogeny of Aristolochiaceae based on parsimony, likelihood, and Bayesian analyses of trnL-trnF sequences. Plant Systematics and...
(N) - Armoracia rusticana (I)
- Arnoglossum atriplicifolium (N)
- Arnoglossum plantagineumArnoglossum plantagineumArnoglossum plantagineum also known as groovestem Indian plantain is a species of Arnoglossum and the family Asteraceae....
(N) - Arnoglossum reniforme (N)
- Arnoseris minima (I)
- Arrhenatherum elatius var. elatiusArrhenatherum elatius-Introduction:Arrhenatherum elatius, with the common names false oat-grass, tall oat-grass, tall meadow oat, onion couch and tuber oat-grass, is a perennial species of grass, common in the temperate regions of Europe....
(I) - Artemisia absinthiumArtemisia absinthiumArtemisia absinthium is a species of wormwood, native to temperate regions of Eurasia and northern Africa....
(I) - Artemisia annuaArtemisia annuaArtemisia annua, also known as Sweet Wormwood, Sweet Annie, Sweet Sagewort or Annual Wormwood , is a common type of wormwood that is native to temperate Asia, but naturalized throughout the world.-Characteristics:...
(I) - Artemisia biennisArtemisia biennisArtemisia biennis is a species of sagebrush known by the common name biennial wormwood. It is native to Europe.-Description:This is an annual or biennial herb producing a single erect green to reddish stem up to 2 meters in maximum height. It is generally hairless and unscented...
(N) - Artemisia biennis var. biennisArtemisia biennisArtemisia biennis is a species of sagebrush known by the common name biennial wormwood. It is native to Europe.-Description:This is an annual or biennial herb producing a single erect green to reddish stem up to 2 meters in maximum height. It is generally hairless and unscented...
(I) - Artemisia campestris ssp. borealis var. borealisArtemisia campestrisArtemisia campestris L. is a species of herbaceous biennial or perennial plants in the genus Artemisia that grows in open sites on dry sandy soils throughout the Boreal Kingdom.-External links:** in Flora of North America...
(N) - Artemisia campestris ssp. caudataArtemisia campestrisArtemisia campestris L. is a species of herbaceous biennial or perennial plants in the genus Artemisia that grows in open sites on dry sandy soils throughout the Boreal Kingdom.-External links:** in Flora of North America...
(N) - Artemisia gmelinii (I)
- Artemisia ludoviciana ssp. albulaArtemisia ludovicianaArtemisia ludoviciana is a species of sagebrush known by several common names, including silver wormwood, Louisiana wormwood, white sagebrush, and gray sagewort....
(N) - Artemisia ludoviciana ssp. ludovicianaArtemisia ludovicianaArtemisia ludoviciana is a species of sagebrush known by several common names, including silver wormwood, Louisiana wormwood, white sagebrush, and gray sagewort....
(N) - Artemisia pontica (I)
- Artemisia stelleriana (I)
- Artemisia stelleriana (N)
- Artemisia vulgarisArtemisia vulgarisArtemisia vulgaris is one of several species in the genus Artemisia which have common names that include the word mugwort. This species is also occasionally known as Felon Herb, Chrysanthemum Weed, Wild Wormwood, Old uncle Henry, Sailor's Tobacco, Naughty Man, Old Man or St...
(N) - Artemisia vulgaris var. vulgarisArtemisia vulgarisArtemisia vulgaris is one of several species in the genus Artemisia which have common names that include the word mugwort. This species is also occasionally known as Felon Herb, Chrysanthemum Weed, Wild Wormwood, Old uncle Henry, Sailor's Tobacco, Naughty Man, Old Man or St...
(I) - Arthraxon hispidus (I)
- Aruncus dioicusAruncus dioicusAruncus dioicus is a plant in the rose family, Rosaceae. It is a herbaceous plant with alternate, pinnately compound leaves, on thin, stiff stems. The flowers are white, borne in summer. This plant can be found throughout Europe, Asia, and eastern and western North America...
(I) - Aruncus dioicus var. dioicusAruncus dioicusAruncus dioicus is a plant in the rose family, Rosaceae. It is a herbaceous plant with alternate, pinnately compound leaves, on thin, stiff stems. The flowers are white, borne in summer. This plant can be found throughout Europe, Asia, and eastern and western North America...
(N) - Arundinaria gigantea ssp. gigantea (N)
- Asarum canadenseAsarum canadenseAsarum canadense, commonly known as Canada wild ginger, Canadian snakeroot and broad-leaved asarabaccais, is a herbaceous perennial native to deciduous forest in eastern North America, from the Great Plains east to the Atlantic Coast, and from southeastern Canada south to approximately the fall...
(N) - Asclepias amplexicaulisAsclepias amplexicaulisAsclepias amplexicaulis is a species of milkweed, in the subfamily Asclepiadaceae, which is cited as a wildflower native to the United States , mostly found in Central and Eastern areas and grown in the spring time. Its found grown in dry fields and open woods, usually in sandy soil and 1-3 feet...
(N) - Asclepias exaltata (N)
- Asclepias hirtella (N)
- Asclepias incarnata ssp. incarnata (N)
- Asclepias purpurascensAsclepias purpurascensPurple milkweed is a herbaceous plant species. It is in the genus Asclepias, making it a type of milkweed. It is native to the Eastern, Southern and Midwestern United States similar to the range of the Common Milkweed...
(N) - Asclepias quadrifolia (N)
- Asclepias sullivantii (N)
- Asclepias syriaca (N)
- Asclepias tuberosa ssp. interior (N)
- Asclepias tuberosa ssp. tuberosa (N)
- Asclepias variegata (N)
- Asclepias verticillataAsclepias verticillataAsclepias verticillata is a species of milkweed which is used as a medicinal plant by Native American tribes and in Butterfly gardening.-Description:...
(N) - Asclepias viridiflora (N)
- Asclepias viridis (N)
- Asimina trilobaAsimina trilobaAsimina triloba, the pawpaw, paw paw, paw-paw, or common pawpaw, is a species of Asimina in the same plant family as the custard-apple, cherimoya, sweetsop, ylang-ylang and soursop...
(N) - Asparagus officinalis (I)
- Asperugo procumbens (I)
- Asplenium bradleyiAsplenium bradleyiBradley's spleenwort, Asplenium bradleyi, is a rare rock fern of the Appalachian area of eastern North America. It is a species of hybrid origin. The parents are Asplenium montanum and Asplenium platyneuron. The hybrid became a species with a doubling of the chromosome number, hence this species...
(N) - Asplenium × clermontiae (N)
- Asplenium × ebenoides (N)
- Asplenium × gravesii (N)
- Asplenium × inexpectatum (N)
- Asplenium × kentuckiense (N)
- Asplenium montanumAsplenium montanumAsplenium montanum is commonly known as the mountain spleenwort, a simple reflection of the scientific name. It is a small but intricately divided fern of acid rocks. Typically, it grows in rock crevices into which moisture seeps from within the rock strata...
(N) - Asplenium pinnatifidumAsplenium pinnatifidumAsplenium pinnatifidum is known as the lobed spleenwort or pinnatifid spleenwort. It is an Appalachian rock fern, growing in rock crevices in moderately acid to subacid strata. It is often confused with Asplenium bradleyi....
(N) - Asplenium platyneuron var. platyneuron (N)
- Asplenium resiliens (N)
- Asplenium rhizophyllumAsplenium rhizophyllumAsplenium rhizophyllum, the American Walking Fern, is a rare, low lying fern native to North America. It is a close relative of Asplenium ruprechtii which is found in East Asia and also goes by the common name of walking fern.-Description:The name walking fern was derived from the way the fern...
(N) - Asplenium ruta-muraria var. cryptolepisAsplenium ruta-murariaAsplenium ruta-muraria is a species of fern commonly known as wall-rue. In Germany, it is known as Mauerraute or Mauerstreifenfarn. It is a very small epipetric species, growing exclusively on limestone and other calcareous rocks. It is native to both Europe and eastern North America...
(N) - Asplenium ruta-muraria var. lanceolumAsplenium ruta-murariaAsplenium ruta-muraria is a species of fern commonly known as wall-rue. In Germany, it is known as Mauerraute or Mauerstreifenfarn. It is a very small epipetric species, growing exclusively on limestone and other calcareous rocks. It is native to both Europe and eastern North America...
(N) - Asplenium trichomanes ssp. quadrivalensAsplenium trichomanesAsplenium trichomanes is a small fern in the spleenwort genus Asplenium. It is a widespread and common species, occurring almost worldwide in a variety of rocky habitats. It is a variable fern with several subspecies.-Description:It grows in tufts from a short rhizome...
(N) - Asplenium trichomanes ssp. trichomanesAsplenium trichomanesAsplenium trichomanes is a small fern in the spleenwort genus Asplenium. It is a widespread and common species, occurring almost worldwide in a variety of rocky habitats. It is a variable fern with several subspecies.-Description:It grows in tufts from a short rhizome...
(N) - Asplenium × trudellii (N)
- Aster tataricusAster tataricusAster tataricus is a member of the Aster genus of flowering plants.-Traditional uses:It is one of the 50 fundamental herbs of Traditional Chinese medicine, where it has the name zǐwǎn . It has an antibacterial action, inhibiting the growth of Staphylococcus aureus, E. coli, Bacillus dysenteriae, B...
(I) - Astragalus canadensis var. canadensisAstragalus canadensisAstragalus canadensis is a common and widespread member of the milkvetch genus in the legume family, known commonly as Canadian milkvetch. The plant is found throughout Canada and the United States in many habitats including wetlands, woodlands, and prairies...
(N) - Astragalus neglectus (N)
- Athyrium filix-femina ssp. angustumAthyrium filix-feminaAthyrium filix-femina is a large, feathery species of fern native throughout most of the temperate Northern Hemisphere, where it is often abundant in damp, shady woodland environments and is often grown for decoration.The plant is caespitose Athyrium filix-femina (Lady Fern or Common Lady-fern)...
(N) - Athyrium filix-femina ssp. asplenioidesAthyrium filix-feminaAthyrium filix-femina is a large, feathery species of fern native throughout most of the temperate Northern Hemisphere, where it is often abundant in damp, shady woodland environments and is often grown for decoration.The plant is caespitose Athyrium filix-femina (Lady Fern or Common Lady-fern)...
(N) - Atriplex hortensisAtriplex hortensisAtriplex hortensis, also known as Garden Orache, Red Orach, Mountain Spinach, French Spinach, or simply "orache" or arrach, is a hardy, annual plant, with an erect, branching stem, varying in height from two to six feet, according to the variety and soil...
(I) - Atriplex patulaAtriplex patulaAtriplex patula L. is a ruderal, circumboreal species of annual herbaceous plants in the genus Atriplex naturalized in many temperate regions....
(I) - Atriplex prostrata (N)
- Atriplex roseaAtriplex roseaAtriplex rosea is a species of saltbush known by the common names tumbling saltbush, red orach, and tumbling orach. It is native to Eurasia but it is widespread elsewhere as an introduced species....
(I) - Aureolaria flava var. flava (N)
- Aureolaria flava var. macrantha (N)
- Aureolaria laevigata (N)
- Aureolaria pedicularia var. ambigens (N)
- Aureolaria pedicularia var. pedicularia (N)
- Aureolaria virginica (N)
- Aurinia saxatilisAurinia saxatilisAurinia saxatilis Aurinia saxatilis Aurinia saxatilis (Basket of Gold, Goldentuft alyssum, Golden Alyssum, Gold-dust, Golden-tuft alyssum, Golden-tuft madwort, Rock madwort; syn. Alyssum saxatile L., Alyssum saxatile L. var...
(I) - Avena fatuaAvena fatuaAvena fatua is a species of grass in the oat genus. It is known as the common wild oat. This oat is native to Eurasia but it has been introduced to most of the other temperate regions of the world. It is naturalized in some areas and considered a noxious weed in others...
(I) - Avena sativa (I)
- Azolla carolinianaAzolla carolinianaAzolla caroliniana is a species of Azolla native to the Americas, in eastern North America from southern Ontario southward, and from the east coast west to Wisconsin and Texas, and in the Caribbean, and in Central and South America from southeastern Mexico south to northern Argentina and...
(N)
B
- Ballota nigra var. alba (I)
- Baptisia alba var. macrophyllaBaptisia albaBaptisia alba, commonly called White Wild Indigo or White False Indigo, is a herbaceous plant in the bean family Fabaceae. It is native from central and eastern North America.'...
(N) - Baptisia australis var. australis (N)
- Baptisia tinctoriaBaptisia tinctoriaBaptisia tinctoria is a herbaceous perennial plant in the family Fabaceae. It is native to eastern North America.-Distribution:...
(N) - Barbarea vernaBarbarea vernaLand cress , also known as American cress, bank cress, black wood cress, Belle Isle cress, Bermuda cress, early yellowrocket, early wintercress, scurvy cress, and upland cress, is a biennial herb in the family Brassicaceae. It is native to southwestern Europe, but is also cultivated in Florida...
(I) - Barbarea vulgarisBarbarea vulgarisBarbarea vulgaris, also called as Bittercress, Herb Barbara, Rocketcress, Yellow Rocketcress, Winter Rocket, and Wound Rocket, is a biennial herb of the genus Barbarea, belonging to the family Brassicaceae....
(I) - Bartonia virginica (N)
- Bassia hirsuta (I)
- Bassia scoparia (I)
- Beckmannia syzigachneBeckmannia syzigachneBeckmannia syzigachne, American sloughgrass, slough grass, is an annual or short lived perennial bunchgrass in the Poaceae family found in shallow marshes or sloughs....
(N) - Belamcanda chinensis (I)
- Bellis perennisBellis perennisBellis perennis is a common European species of Daisy, often considered the archetypal species of that name. Many related plants also share the name "Daisy", so to distinguish this species from other daisies it is sometimes qualified as Common Daisy, Lawn Daisy or occasionally English daisy. It is...
(I) - Berberis × ottawensis (N)
- Berberis thunbergiiBerberis thunbergiiBerberis thunbergii is a species of Berberis, native to Japan and eastern Asia....
(I) - Berberis vulgarisBerberis vulgarisBerberis vulgaris /// is a shrub in the family Berberidaceae, native to central and southern Europe, northwest Africa and western Asia; it is also naturalised in northern Europe, including the British Isles and Scandinavia, and North America.It is a deciduous shrub growing up to 4 m high...
(I) - Berteroa incanaBerteroa incanaBerteroa incana is a plant in the mustard family, Brassicaceae.Berteroa incana grows from a deep taproot and is an annual, biennial or short-lived perennial herbaceous plant with alternate, simple gray-green leaves. The foliage is rough with star shaped hairs...
(I) - Besseya bullii (N)
- Betula alleghaniensis var. alleghaniensis (N)
- Betula alleghaniensis var. macrolepis (N)
- Betula lenta (N)
- Betula nigra (N)
- Betula papyrifera var. papyrifera (N)
- Betula pendula (I)
- Betula populifolia (N)
- Betula pubescens (N)
- Betula pubescens ssp. pubescens (I)
- Betula pumila var. pumila (N)
- Betula × purpusii (N)
- Bidens aristosaBidens aristosaBidens aristosa, commonly called Bearded Beggarticks, Long-bracted Beggarticks, Tickseed Beggarticks, or Western Tickseed, is a species of flowering plant in the family Asteraceae. It belongs to the genus Bidens...
(N) - Bidens beckii (N)
- Bidens bipinnata (N)
- Bidens cernua (N)
- Bidens connata (N)
- Bidens coronata (N)
- Bidens discoidea (N)
- Bidens frondosaBidens frondosaDevil's Beggarticks is an annual herb in the family Asteraceae, native to North America. It is known by a variety of different names, including Common Beggarticks, Common Tickseed, Large-leaved Beggarticks, Devil's Bootjack, Devil's Pitchfork, and Pitchfork Weed.It is up to 2 m tall, usually with...
(N) - Bidens laevisBidens laevisBidens laevis is a species of flowering plant in the daisy family known by the common names bur-marigold and smooth beggarticks. It is native to the southern half of the United States, where it grows in wetlands, including estuaries and riverbanks. It is similar in appearance to its relative Bidens...
(N) - Bidens tripartitaBidens tripartitaBidens tripartita, commonly known as Three-lobe Beggarticks, Three-part Beggarticks, Leafy-bracted Beggarticks or Trifid Bur-marigold, is a flowering plant in the genus Bidens. It is native to large parts of the Northern hemisphere, including Europe, the Indian subcontinent, North America,...
(N) - Bidens vulgataBidens vulgataBidens vulgata is a species of flowering plant in the daisy family known by the common name big devils beggartick. It is native to eastern North America, where it is a plant of wetlands. It is an introduced species in much of western North America as well as parts of Europe...
(N) - Bignonia capreolataBignonia capreolataBignonia capreolata is a vine commonly referred to as crossvine. The common name refers to the cross-shaped pattern revealed when the stem is cut; this pattern results from four radial wedges of phloem embedded within the stem’s xylem. It is native to the central and southern United States. The...
(N) - Blephilia ciliata (N)
- Blephilia hirsuta var. hirsuta (N)
- Boehmeria cylindrica (N)
- Boltonia asteroides var. recognitaBoltonia asteroidesFalse aster or White doll's daisy is a species of ornamental plant.-External links:* University of Southern Indiana* United States Department of Agriculture...
(N) - Borago officinalis (I)
- Botrychium biternatum (N)
- Botrychium dissectum (N)
- Botrychium lanceolatum var. angustisegmentum (N)
- Botrychium matricariifoliumBotrychium matricariifoliumBotrychium matricariifolium is a common species of fern known by the common names chamomile grape-fern, daisyleaf grape-fern, and matricary grape-fern. It is native to Europe and parts of eastern North America, including eastern Canada and the United States.This fleshy fern grows up to 30...
(N) - Botrychium multifidumBotrychium multifidumSceptridium multifidum is a species of fern in the Moonwort Family, known by the common names leathery grapefern and leathery moonwort. It is native to Europe, Asia, and North America, where it is widespread and grows in moist areas in many habitat types. This is a fleshy, leathery plant growing...
(N) - Botrychium oneidense (N)
- Botrychium simplex (N)
- Botrychium virginianum (N)
- Bouteloua curtipendula var. curtipendula (N)
- Bouteloua gracilis (N)
- Bouteloua hirsuta var. hirsutaBouteloua hirsutaBouteloua hirsuta, commonly known as Hairy grama, is a perennial short prairie grass that is native throughout much of North America, including the Great Plains and Canadian Prairies region, as well as Mexico and Guatemala.-Description:...
(N) - Brachyelytrum erectum (N)
- Brasenia schreberi (N)
- Brassica junceaBrassica junceaBrassica juncea, also known as mustard greens, Indian mustard, Chinese mustard, and leaf mustard, is a species of mustard plant. Subvarieties include southern giant curled mustard, which resembles a headless cabbage such as kale, but with a distinct horseradish-mustard flavor...
(I) - Brassica napus (I)
- Brassica nigraBrassica nigraBrassica nigra is an annual weedy plant cultivated for its seeds, which are commonly used as a spice.-Description:...
(I) - Brassica oleraceaBrassica oleraceaBrassica oleracea, or wild cabbage, is a species of Brassica native to coastal southern and western Europe, where its tolerance of salt and lime and its intolerance of competition from other plants typically restrict its natural occurrence to limestone sea cliffs, like the chalk cliffs on both...
(I) - Brassica rapa var. amplexicaulisBrassica rapaBrassica rapa L. , commonly known as turnip, turnip rape, field mustard or turnip mustard is a plant widely cultivated as a leaf vegetable , a root vegetable , and an oilseed .In the 18th century the turnip and...
(I) - Brassica rapa var. rapaBrassica rapaBrassica rapa L. , commonly known as turnip, turnip rape, field mustard or turnip mustard is a plant widely cultivated as a leaf vegetable , a root vegetable , and an oilseed .In the 18th century the turnip and...
(I) - Brickellia eupatorioides var. corymbulosa (N)
- Brickellia eupatorioides var. eupatorioides (N)
- Bromus arvensis (I)
- Bromus briziformisBromus briziformisBromus briziformis is a species of brome grass known by the common name rattlesnake brome.It is native to Eurasia and it can be found in North America as an introduced species. It is an annual grass growing up to 70 centimeters tall. The inflorescence is an open arrangement of nodding, flat spikelets...
(I) - Bromus catharticusBromus catharticusBromus catharticus is a species of brome grass known by the common name rescuegrass.It is native to South America but it can be found in other places, including Europe, Australia and North America, as an introduced species. It is an annual or perennial grass growing up to a meter in height...
(I) - Bromus ciliatus var. ciliatusBromus ciliatusBromus ciliatus is a species of brome grass known by the common name fringed brome.It is native to most of North America, including most of Canada, most of the United States except for some portions of the South, and northern Mexico. It is a plant of many habitats, including temperate coniferous...
(N) - Bromus erectusBromus erectusBromus erectus, commonly known as either upright brome or meadow brome, is a dense, course, tufted perennial grass. It can grow to 120cm. Like many brome grasses the plant is hairy.-Description:...
(I) - Bromus hordeaceus ssp. hordeaceusBromus hordeaceusBromus hordeaceus, the Soft Brome, is an annual or biennial species of plant in the true grass family . It is also known in North America as Bull Grass, Soft Cheat or Soft Chess....
(I) - Bromus inermisBromus inermisBromus inermis is a species of the true grass family . This bunchgrass is native to Europe- Common names :* Arctic brome – English [Bromus inermis subsp. pumpellianus]* Austrian bromegrass – English [Bromus inermis subsp. inermis]...
(N) - Bromus inermis ssp. inermis var. inermisBromus inermisBromus inermis is a species of the true grass family . This bunchgrass is native to Europe- Common names :* Arctic brome – English [Bromus inermis subsp. pumpellianus]* Austrian bromegrass – English [Bromus inermis subsp. inermis]...
(I) - Bromus kalmiiBromus kalmiiBromus kalmii, Arctic brome and Prairie brome, is a species of brome grass. It is a native bunchgrass in the North-central and Northeastern United States, the Great Lakes region, and eastern Canada.-External links:**...
(N) - Bromus latiglumis (N)
- Bromus nottowayanus (N)
- Bromus pubescens (N)
- Bromus racemosus (I)
- Bromus secalinus var. secalinusBromus secalinusBromus secalinus is a species of bromegrass known as rye brome.This grass is native to Eurasia but is well-known in many other parts of the world where it has been introduced. It is a noxious weed throughout much of North America. This is an annual grass reaching maximum heights of one half to one...
(I) - Bromus sterilisBromus sterilis-Introduction:Bromus sterilis is an annual or biennial species of bromegrass known as barren brome, poverty brome, and sterile brome.-Range:...
(I) - Bromus tectorum (I)
- Broussonetia papyrifera (I)
- Browallia americanaBrowallia americanaThe Jamaican Forget-Me-Not, Amethyst flower, or Bush Violet is a flowering plant. It is native to tropical Latin America, from Mexico and the Caribbean, south to Peru and Brazil. Forms are variable. Pictured is the broader-leaved form....
(I) - Brunnera macrophyllaBrunnera macrophyllaBrunnera macrophylla is a plant in the borage family, Boraginaceae.-Description:Brunnera macrophylla is a herbaceous plant with basal, simple leaves, on slender stems. The flowers are blue, borne in spring....
(I) - Buchnera americana (N)
- Buddleja davidiiBuddleja davidiiBuddleja davidii , also called summer lilac, butterfly-bush, or orange eye, is a native of Sichuan and Hubei provinces in central China and of Japan. It is widely used as an ornamental plant, and many named varieties are in cultivation. B...
(I) - Buglossoides arvensis (I)
- Bulbostylis capillaris ssp. capillarisBulbostylis capillarisBulbostylis capillaris is a species of sedge known by the common names densetuft hairsedge and threadleaf beakseed. It is native to much of North and Central America, where it grows in many types of habitat, generally in moist areas such as streamside meadows...
(N) - Bunias orientalisBunias orientalisBunias orientalis is a plant species in the genus Bunias....
(I) - Bupleurum lancifoliumBupleurum lancifoliumBupleurum lancifolium is a species of flowering plant in the carrot family known by the common name lanceleaf thorow-wax. It is native to the Mediterranean Basin and it is known elsewhere, including parts of North America, as an introduced species. It grows up to 50 centimeters tall with a...
(I) - Bupleurum rotundifolium (I)
- Butomus umbellatus (I)
- Buxus sempervirensBuxus sempervirensBuxus sempervirens is a flowering plant in the genus Buxus, native to western and southern Europe, northwest Africa, and southwest Asia, from southern England south to northern Morocco, and east through the northern Mediterranean region to Turkey. Buxus colchica of western Caucasus and B...
(I)
C
- Cabomba caroliniana var. carolinianaCabomba carolinianaCabomba caroliniana, commonly known as Green Cabomba, is an aquatic perennial herbaceous plant native to North America. It is a Weed of National Significance in Australia.-Distribution:...
(N) - Cakile edentula ssp. edentula var. lacustris (N)
- Cakile edentula ssp. edentula (N)
- Calamagrostis canadensis var. canadensisCalamagrostis canadensisCalamagrostis canadensis is a species of grass, having three or more varieties, in the Poaceae family. It is known variously by the common names of Bluejoint, Bluejoint reedgrass, Marsh reedgrass, Canadian reedgrass, Meadow pinegrass, and Marsh pinegrass.-Varieties:Calamagrostis canadensis takes...
(N) - Calamagrostis canadensis var. macounianaCalamagrostis canadensisCalamagrostis canadensis is a species of grass, having three or more varieties, in the Poaceae family. It is known variously by the common names of Bluejoint, Bluejoint reedgrass, Marsh reedgrass, Canadian reedgrass, Meadow pinegrass, and Marsh pinegrass.-Varieties:Calamagrostis canadensis takes...
(N) - Calamagrostis coarctata (N)
- Calamagrostis porteri ssp. insperata (N)
- Calamagrostis stricta ssp. inexpansaCalamagrostis strictaCalamagrostis stricta, Slim-stem Reed Grass, Koeler is a species of bunch grass in the Poaceae family.Calamagrostis stricta is native to wetlands of the Holarctic Kingdom....
(N) - Calamovilfa longifolia var. magna (N)
- Calendula officinalisCalendula officinalisCalendula officinalis is a plant in the genus Calendula , in the family Asteraceae. It is probably native to southern Europe though its long history of cultivation makes its precise origin unknown, and may possibly be of garden origin...
(I) - Calla palustris (N)
- Callitriche heterophylla ssp. heterophylla (N)
- Callitriche palustris (N)
- Callitriche terrestrisCallitriche terrestrisCallitriche terrestris is a species of plant in the Callitrichaceae family found in Canada and in the eastern United States....
(N) - Calluna vulgaris (I)
- Calopogon tuberosus var. tuberosusCalopogon tuberosusCalopogon tuberosus, the tuberous grasspink, is an orchid native to eastern North America. In the United States it occurs from as far southwest as Texas and Oklahoma and southeast to the Florida Everglades to as far northeast as Maine and as far northwest as Minnesota. In Canada it is found in the...
(N) - Caltha palustris var. palustrisCaltha palustrisCaltha palustris is a herbaceous perennial plant of the buttercup family, native to marshes, fens, ditches and wet woodland in temperate regions of the Northern Hemisphere....
(N) - Calycanthus floridus var. glaucus (N)
- Calystegia hederacea (I)
- Calystegia sepium ssp. americanaCalystegia sepiumCalystegia sepium is a species of bindweed, with a subcosmopolitan distribution throughout temperate Northern Hemisphere in Europe, Asia, northwestern Africa, and North America, and in the temperate Southern Hemisphere in Australia, and...
(N) - Calystegia sepium ssp. angulataCalystegia sepiumCalystegia sepium is a species of bindweed, with a subcosmopolitan distribution throughout temperate Northern Hemisphere in Europe, Asia, northwestern Africa, and North America, and in the temperate Southern Hemisphere in Australia, and...
(N) - Calystegia sepium ssp. sepiumCalystegia sepiumCalystegia sepium is a species of bindweed, with a subcosmopolitan distribution throughout temperate Northern Hemisphere in Europe, Asia, northwestern Africa, and North America, and in the temperate Southern Hemisphere in Australia, and...
(I) - Calystegia silvaticaCalystegia silvaticaThe morning glory Calystegia silvatica is known by the common name giant bindweed. It is the largest species of bindweed and is a strong rampant climber....
(I) - Calystegia silvatica ssp. fraternifloraCalystegia silvaticaThe morning glory Calystegia silvatica is known by the common name giant bindweed. It is the largest species of bindweed and is a strong rampant climber....
(N) - Calystegia spithamaea ssp. spithamaea (N)
- Camassia scilloidesCamassia scilloidesCamassia scilloides is a perennial herb also known as the Atlantic camas and Southern Wild Hyacinth. It is native to the eastern half of North America...
(N) - Camelina microcarpaCamelina microcarpaCamelina microcarpa is a species of flowering plant in the mustard family known by several common names, including littlepod false flax and small seed false flax. It is native to Europe and Asia, and it is common across the globe as an introduced species and sometimes a noxious weed. It is known as...
(I) - Camelina sativa ssp. sativaCamelina sativaCamelina sativa, usually known in English as camelina, gold-of-pleasure, or false flax, also occasionally wild flax, linseed dodder, German sesame, and Siberian oilseed, is a flowering plant in the family Brassicaceae which includes mustard, cabbage, rapeseed, broccoli, cauliflower, kale, brussels...
(I) - Campanula aparinoides (N)
- Campanula rapunculoidesCampanula rapunculoidesCampanula rapunculoides, common names Creeping Bellflower or Rampion Bellflower, is a perennial herbaceous plant of the genus Campanula, belonging to the family Campanulaceae.-Etymology:...
(I) - Campanula rotundifolia (N)
- Campanula tracheliumCampanula tracheliumCampanula trachelium or Nettle-leaved Bellflower is a species of bellflower found in North America and Germany.Campanula trachelium is a Eurasian blue wildflower native to Denmark and England and now naturalized in southeast Ireland...
(I) - Campanulastrum americanumCampanulastrum americanumAmerican bellflower is a tall bellflower native to eastern North America from the Great Lakes region south to Florida and from the Dakotas east to New York. Its flowers are light blue to violet and usually form in elongated clusters. It is an unusual bellflower in that its flowers are usually...
(N) - Campsis radicans (N)
- Cannabis sativa ssp. sativa var. sativaCannabis sativaCannabis sativa is an annual herbaceous plant in the Cannabaceae family. Humans have cultivated this herb throughout recorded history as a source of industrial fibre, seed oil, food, recreation, spiritual enlightenment and medicine...
(I) - Capsella bursa-pastoris (I)
- Cardamine angustata (N)
- Cardamine bulbifera (I)
- Cardamine bulbosaCardamine bulbosaThe Bulbous Cress, Bittercress, or Spring Cress is a perennial plant native to eastern North America. This plant grows in moist soils of bottomland woods and wet meadows....
(N) - Cardamine concatenataCardamine concatenataThe Cutleaf Toothwort, Crow's Toes, Pepper Root, Purple-flowered Toothwort is a flowering plant in Brassicaceae. It owes its name to the tooth-like appearance of its rhizome. It is a perennial plant woodland wildflower native to eastern North America...
(N) - Cardamine diphyllaCardamine diphyllaCardamine diphylla is a plant is native to North America.C...
(N) - Cardamine dissecta (N)
- Cardamine douglassii (N)
- Cardamine flexuosaCardamine flexuosaCardamine flexuosa, commonly known as Wavy Bittercress, is a herbaceous annual plant of the genus Cardamine....
(I) - Cardamine hirsutaCardamine hirsutaHairy Bittercress, Cardamine hirsuta, is a winter annual plant native to Europe and Asia, but also present in North America as an invasive weed. The plant is a member of the mustard family , and is edible as a bitter herb. It flowers from quite early in the Spring until the Autumn...
(I) - Cardamine impatiensCardamine impatiensCardamine impatiens or Narrow-leaved Bittercress is a plant species of the genus Cardamine belonging to the family Brassicaceae. It is a slender, biennial herb, that produces sterile leaves in the first year, one to several flowering stems during the next. Its leaves are pinnate with several pairs...
(I) - Cardamine maxima (N)
- Cardamine parviflora var. arenicola (N)
- Cardamine pensylvanicaCardamine pensylvanicaCardamine pensylvanica is a species of cardamine known by the common name Pennsylvania bittercress. It is native to most of Canada and the United States from coast to coast. It is generally found in moist to wet areas, such as the mud on riverbanks...
(N) - Cardamine pratensis var. pratensisCardamine pratensisCardamine pratensis , is a flowering plant in the family Brassicaceae, native throughout most of Europe and Western Asia.-Description:...
(N) - Cardamine rotundifolia (N)
- Cardaria draba (I)
- Cardiospermum halicacabumCardiospermum halicacabumCardiospermum halicacabum, known as the Balloon plant or Love in a puff, is a climbing plant widely distributed in tropical and subtropical Africa and Asia...
(I) - Carduus acanthoidesCarduus acanthoidesCarduus acanthoides is a species of thistle known as the spiny plumeless thistle and welted thistle. This plant is native to Europe but is well-known in many other parts of the world, including parts of North and South America, New Zealand, and Australia, as a noxious weed. This thistle may exceed...
(I) - Carduus crispusCarduus crispusCarduus crispus or Welted thistle is a member of the daisy family Asteraceae. It is a favorite foodplant of caterpillars of the Painted Lady , which derives its specific epithet, cardui, from their preference for thistles...
(I) - Carduus nutans (I)
- Carex aggregata (N)
- Carex alata (N)
- Carex albicans var. albicans (N)
- Carex albicans var. emmonsii (N)
- Carex albolutescens (N)
- Carex albursina (N)
- Carex alopecoidea (N)
- Carex amphibola (N)
- Carex annectens (N)
- Carex appalachica (N)
- Carex aquatilis var. aquatilisCarex aquatilisCarex aquatilis is a species of sedge known by the common names water sedge and leafy tussock sedge. It has a circumboreal distribution, occurring throughout the northern reaches of the Northern Hemisphere. It grows in many types of mountainous and Arctic habitat, including temperate coniferous...
(N) - Carex arctata (N)
- Carex argyrantha (N)
- Carex atherodesCarex atherodesCarex atherodes is a species of sedge known by the common name wheat sedge. It is native to Eurasia and much of North America including most of Canada and the United States. It is a very common wetland plant across the American Midwest and areas west. It grows in moist and wet habitat, such as...
(N) - Carex atlantica ssp. atlantica (N)
- Carex atlantica ssp. capillacea (N)
- Carex aureaCarex aureaCarex aurea is a species of sedge known by the common name golden sedge. It is native to much of North America, including most of Canada and the western and central United States. It grows in wet habitat, often on soils of a basic pH.-Description:...
(N) - Carex bebbii (N)
- Carex bicknellii (N)
- Carex blanda (N)
- Carex brevior (N)
- Carex bromoides ssp. bromoides (N)
- Carex brunnescens ssp. sphaerostachya (N)
- Carex bushii (N)
- Carex buxbaumiiCarex buxbaumiiCarex buxbaumii is a species of sedge known by the common name Buxbaum's sedge. It is native to much of the northern Northern Hemisphere, from Alaska to Greenland to Eurasia and including most of Canada and the United States. It grows in wet habitat, such as marshes and fens. This sedge grows in...
(N) - Carex canescens ssp. canescensCarex canescensCarex canescens L. is a perennial species of plants in the family Cyperaceae with pluriregional distribution growing in damp forests and wetlands.-External links:*...
(N) - Carex canescens ssp. disjunctaCarex canescensCarex canescens L. is a perennial species of plants in the family Cyperaceae with pluriregional distribution growing in damp forests and wetlands.-External links:*...
(N) - Carex careyana (N)
- Carex caroliniana (N)
- Carex cephaloidea (N)
- Carex cephalophora (N)
- Carex communis var. communis (N)
- Carex comosaCarex comosaCarex comosa is a species of sedge known by the common name longhair sedge. It is native to North America, where it grows in western and eastern regions of Canada and the United States, and parts of Mexico. It grows in wet places, including meadows and many types of wetlands. Tolerates deeper water...
(N) - Carex conjuncta (N)
- Carex conoidea (N)
- Carex crawei (N)
- Carex crinita var. brevicrinis (N)
- Carex crinita var. crinita (N)
- Carex cristatella (N)
- Carex crus-corvi (N)
- Carex cryptolepis (N)
- Carex cumberlandensis (N)
- Carex davisii (N)
- Carex debilis var. debilis (N)
- Carex debilis var. rudgei (N)
- Carex decomposita (N)
- Carex deweyana var. deweyana (N)
- Carex diandraCarex diandraCarex diandra is a species of sedge known by the common name lesser panicled sedge.-Distribution:It is widely distributed in the Northern Hemisphere, where it can be found throughout North America, Europe, and Asia. It is also known from New Zealand...
(N) - Carex digitalis var. digitalis (N)
- Carex dispermaCarex dispermaCarex disperma is a species of sedge known by the common name softleaf sedge. It is native to much of the northern Northern Hemisphere, from Alaska to Greenland, most of Canada and the contiguous United States, and across Eurasia.-Description:...
(N) - Carex eburnea (N)
- Carex echinata ssp. echinataCarex echinataCarex echinata is a species of sedge known by the common names star sedge and little prickly sedge.-Distribution:This plant is native to North and Central America and parts of Eurasia. Carex echinata is a plant of wet forests, marshes, and mountain meadows of moderate elevation...
(N) - Carex emoryiCarex emoryiCarex emoryi, the Riverbank tussock sedge or Emory's sedge, is a very attractive and functional native plant for stormwater applications. It thrives with alternating cycles of wet and dry, making it ideal for vegetated swales and infiltration basins.Native to much of the Mid-Atlantic and Midwest, C...
(N) - Carex festucaceaCarex festucaceaCarex festucacea or fescue sedge is a species of sedge that lives in eastern North America. It has been described as "a soft, gray green, wisp, to 2', with narrow leaves and somewhat taller stems, topped by an interrupted spike, with lower spikelets, shaped a bit like an overflowing ice cream cone...
(N) - Carex flava (N)
- Carex folliculata (N)
- Carex formosa (N)
- Carex frankii (N)
- Carex garberi (N)
- Carex glaucodea (N)
- Carex gracilescens (N)
- Carex gracillima (N)
- Carex granularis (N)
- Carex grayi (N)
- Carex grisea (N)
- Carex gynandra (N)
- Carex haydenii (N)
- Carex hirsutella (N)
- Carex hirtifolia (N)
- Carex hitchcockiana (N)
- Carex hyalinolepis (N)
- Carex hystericinaCarex hystericinaCarex hystericina is a species of sedge known by the common names bottlebrush sedge and porcupine sedge. It is native to much of North America including most of southern Canada and most of the United States. It grows in wet habitat such as wetlands and riverbanks, especially on calcareous soils. In...
(N) - Carex interiorCarex interiorCarex interior is a species of sedge known by the common name inland sedge. It is native to much of North America from Alaska to northern Mexico to the mid-Atlantic United States. It grows in wet habitat, most often in calcareous soils. This sedge produces clumps of stems approaching a meter in...
(N) - Carex intumescensCarex intumescensCarex intumescens, also known as bladder sedge, is a species of Carex...
(N) - Carex jamesiiCarex jamesiiCarex jamesii is a sedge native to North America from Minnesota east to New York and south to Oklahoma and South Carolina. It occurs in mesic hardwood forests and flowers from early May to mid July. For its genus, it is a distinctive species when in flower. It has two to four perigynia that are...
(N) - Carex juniperorum (N)
- Carex lacustris (N)
- Carex laevivaginata (N)
- Carex lasiocarpa var. americanaCarex lasiocarpaCarex lasiocarpa is a species of sedge known by the common names slender sedge and woollyfruit sedge.-Distribution:This is an aquatic or shore plant of wet areas in mountainous areas of moderate elevation. It is found across much of North America and Eurasia...
(N) - Carex laxiculmis var. copulata (N)
- Carex laxiculmis var. laxiculmis (N)
- Carex laxiflora var. laxiflora (N)
- Carex leavenworthii (N)
- Carex leptalea ssp. leptaleaCarex leptaleaCarex leptalea is a species of sedge known by the common names bristly-stalked sedge and flaccid sedge. It is native to much of North America including most of Canada and the United States. It only grows in wetlands. This sedge produces dense clusters of thin stems up to 70 centimeters tall from a...
(N) - Carex leptonervia (N)
- Carex limosaCarex limosaCarex limosa is a species of sedge known by the common names mud sedge and shore sedge.-Distribution:This sedge is an aquatic or shore plant which can most often be found in peat bogs in mountains. It is distributed across North America and Eurasia.-Description:Carex limosa has a large rhizome and...
(N) - Carex longii (N)
- Carex louisianica (N)
- Carex lucorum var. lucorum (N)
- Carex lupuliformis (N)
- Carex lupulina (N)
- Carex lurida (N)
- Carex magellanica ssp. irrigua (N)
- Carex meadii (N)
- Carex merritt-fernaldii (N)
- Carex mesochorea (N)
- Carex molestaCarex molestaCarex molesta is a species of sedge known by the common name troublesome sedge. It is native to eastern and central North America, where it grows in varied wet and dry habitats, performs equally well in full sun and partial shade, including disturbed areas such as roadsides. It is an introduced...
(N) - Carex muehlenbergii var. enervis (N)
- Carex muehlenbergii var. muehlenbergii (N)
- Carex muskingumensis (N)
- Carex nigromarginata (N)
- Carex normalis (N)
- Carex oligocarpa (N)
- Carex oligosperma var. oligosperma (N)
- Carex pallescens (N)
- Carex peckii (N)
- Carex pedunculata (N)
- Carex pellitaCarex pellitaCarex pellita is a species of sedge known by the common name woolly sedge.-Distribution:This sedge is native to much of North America, including southern Canada and the United States, except the Southeast.-Description:...
(N) - Carex pensylvanicaCarex pensylvanicaCarex pensylvanica is a species of flowering plant in the sedge family commonly called Pennsylvania sedge.-Distribution:Based on a census of the literature, herbaria specimens, and confirmed sightings, C. pensylvanica is found in Manitoba Ontario and Quebec in Canada; and in the United States...
(N) - Carex planispicata (N)
- Carex plantaginea (N)
- Carex platyphylla (N)
- Carex praegracilisCarex praegracilisCarex praegracilis is a species of sedge known by the common names clustered field sedge, field sedge, and expressway sedge.-Distribution:...
(N) - Carex prairea (N)
- Carex prasina (N)
- Carex projecta (N)
- Carex pseudocyperus (N)
- Carex purpurifera (N)
- Carex radiata (N)
- Carex retroflexa (N)
- Carex retrorsa (N)
- Carex richardsonii (N)
- Carex rosea (N)
- Carex sartwellii var. sartwellii (N)
- Carex scabrata (N)
- Carex scoparia var. scopariaCarex scopariaCarex scoparia is a species of sedge known by the common names broom sedge and pointed broom sedge. It should not be confused with the unrelated grass species known as "broom sedge," Andropogon virginicus.-Distribution:...
(N) - Carex seorsa (N)
- Carex shortiana (N)
- Carex siccata (N)
- Carex sparganioidesCarex sparganioidesBur-reed sedge is a perennial plant belonging to the sedge family . Its native range includes most of the Eastern and Central U.S., and it is typically found in hardwood or mixed forests...
(N) - Carex spicataCarex spicataCarex spicata is a species of sedge in the genus Carex.-Description:The culms of Carex spicata are long and approximately triangular in section. The leaves are long and wide, with a distinct keel. The ligule, at the base of the leaf, is long, with a large amount of loose white tissue. C...
(I) - Carex sprengelii (N)
- Carex squarrosa (N)
- Carex sterilis (N)
- Carex stipata var. maxima (N)
- Carex stipata var. stipata (N)
- Carex straminea (N)
- Carex striatula (N)
- Carex strictaCarex strictaCarex stricta is a species of sedge known by the common name Tussock Sedge.-External links:*...
(N) - Carex styloflexa (N)
- Carex suberecta (N)
- Carex × subimpressa (N)
- Carex × sullivantii (N)
- Carex swanii (N)
- Carex tenera (N)
- Carex tenuiflora (N)
- Carex tetanica (N)
- Carex texensis (N)
- Carex timida (N)
- Carex tonsa var. rugosperma (N)
- Carex torta (N)
- Carex tribuloides var. tribuloides (N)
- Carex trichocarpa (N)
- Carex trisperma var. trisperma (N)
- Carex tuckermanii (N)
- Carex typhina (N)
- Carex umbellata (N)
- Carex utriculataCarex utriculataCarex utriculata is a species of sedge known by the common name Northwest Territory sedge.-Distribution:This sedge is native to the northern half of North America, including most all of Canada and the northern United States, and down to montane California. It is also found in parts of Eurasia...
(N) - Carex vesicaria var. monileCarex vesicariaCarex vesicaria is an essentially Holarctic species of sedge known by the common name Blister Sedge. The dried fibers, sometimes used as thermal insulation in polar regions, are known as sennegrass, saennegrass or similar, from the plant's Bokmål name Sennegras.-Distribution:This sedge is native to...
(N) - Carex virescens (N)
- Carex viridula ssp. viridula (N)
- Carex vulpinoidea var. vulpinoideaCarex vulpinoideaCarex vulpinoidea is a species of sedge known by the common name fox sedge. It is native to North America, including most of Canada and the United States and part of Mexico, and it is known in Europe and New Zealand as an introduced species. The sedge lives in wet and seasonally wet habitat, and...
(N) - Carex willdenowii (N)
- Carex woodii (N)
- Carpinus caroliniana ssp. virginiana (N)
- Carthamus tinctorius (I)
- Carum carvi (I)
- Carya alba (N)
- Carya × brownii (N)
- Carya cordiformis (N)
- Carya glabra (N)
- Carya illinoinensis (N)
- Carya laciniosa (N)
- Carya ovalisCarya ovalisCarya ovalis, the Red Hickory, is a fairly uncommon but widespread Hickory native to eastern North America. It is typically found growing in dry, well drained sandy upland ridges and sloped woodlands from southern Ontario, Canada, and in the United States east to New Hampshire, south to northern...
(N) - Carya ovata (N)
- Castanea dentata (N)
- Castanea pumila var. pumila (N)
- Castilleja coccinea (N)
- Catalpa bignonioides (N)
- Catalpa ovataCatalpa ovataCatalpa ovata, the yellow catalpa or Chinese catalpa , is a pod-bearing tree native to China. Compared to C. speciosa, it is much smaller, typically reaching heights between 20 and 30 feet. The inflorescences form bunches of creamy white flowers with distinctly yellow tinging; individual flowers...
(I) - Catalpa speciosa (N)
- Caulophyllum giganteum (N)
- Caulophyllum thalictroides (N)
- Ceanothus americanusCeanothus americanusCeanothus americanus is a species of shrub native to North America. Common names include New Jersey tea, Jersey tea ceanothus, variations of red root , and mountain sweet , and wild snowball...
(N) - Ceanothus herbaceus (N)
- Celastrus orbiculatus (I)
- Celastrus scandensCelastrus scandensCelastrus scandens, commonly called American Bittersweet or Bittersweet, is a species of staff vines that blooms mostly in June and is commonly found on rich, well-drained soils of woodlands. It has a sturdy perennial vine that may have twining, woody stems that are or longer and an inch or more...
(N) - Celosia argenteaCelosia argenteaCelosia argentea, commonly known as plumed cockscomb, is a plant of tropical origin, and is known for its very bright colors.-Description:...
(I) - Celtis occidentalisCeltis occidentalisCeltis occidentalis, commonly known as the Common hackberry, is a medium-size deciduous tree native to North America. It is also known as the nettletree, beaverwood, northern hackberry, and American hackberry...
(N) - Celtis tenuifoliaCeltis tenuifoliaCeltis tenuifolia, the Dwarf Hackberry or Georgia Hackberry is a shrub or small tree 2 to 12 meters high. It is native to eastern North America, but is very uncommon north of the Ohio River...
(N) - Cenchrus longispinusCenchrus longispinusCenchrus longispinus is a species of grass, also known as Spiny Burr Grass or Gentle Annie. Its burrs produce sharp, barbed spines that can penetrate the hides and mouth of grazing animals....
(N) - Centaurea cyanus (I)
- Centaurea diffusa (I)
- Centaurea jaceaCentaurea jaceaCentaurea jacea is a species of herbaceous perennial plants in the genus Centaurea native to dry meadows and open woodland throughout Europe...
(I) - Centaurea nigraCentaurea nigraCentaurea nigra is a species of flowering plant in the daisy family known by the common names Lesser Knapweed, Common Knapweed and Black Knapweed...
(I) - Centaurea nigrescens (I)
- Centaurea phrygiaCentaurea phrygiaCentaurea phrygia is a species of Centaurea. It is native to Europe....
(I) - Centaurea scabiosaCentaurea scabiosaCentaurea scabiosa or Greater Knapweed is a perennial plant of the genus Centaurea. It is native to Europe and bears purple flower heads.Greater knapweed is found growing in dry grasslands, hedgerows and cliffs on lime-rich soil...
(I) - Centaurea solstitialis (I)
- Centaurea stoebe ssp. micranthos (I)
- Centaurea transalpina (N)
- Centaurium erythraeaCentaurium erythraeaCentaurium erythraea is a species of flowering plant in the gentian family known by the common names common centaury and European centaury. This centaury is a widespread plant of Europe and parts of western Asia and northern Africa. It has also naturalised in parts of North America and throughout...
(I) - Centaurium pulchellum (I)
- Centella erecta (N)
- Cephalanthus occidentalisCephalanthus occidentalisCephalanthus occidentalis is a species of flowering plant in the coffee family, Rubiaceae, that is native to eastern and southern North America. Common names include Buttonbush, Common Buttonbush, Button-willow and Honey-bells....
(N) - Cerastium arvenseCerastium arvenseCerastium arvense is a species of flowering plant in the pink family known by the common name field chickweed. It is a widespread species, occurring throughout Europe and North America, as well as parts of South America. It is a variable species. There are several subspecies, but the number and...
(I) - Cerastium arvense ssp. strictumCerastium arvenseCerastium arvense is a species of flowering plant in the pink family known by the common name field chickweed. It is a widespread species, occurring throughout Europe and North America, as well as parts of South America. It is a variable species. There are several subspecies, but the number and...
(N) - Cerastium arvense ssp. velutinum var. velutinumCerastium arvenseCerastium arvense is a species of flowering plant in the pink family known by the common name field chickweed. It is a widespread species, occurring throughout Europe and North America, as well as parts of South America. It is a variable species. There are several subspecies, but the number and...
(N) - Cerastium arvense ssp. velutinumCerastium arvenseCerastium arvense is a species of flowering plant in the pink family known by the common name field chickweed. It is a widespread species, occurring throughout Europe and North America, as well as parts of South America. It is a variable species. There are several subspecies, but the number and...
(N) - Cerastium brachypetalumCerastium brachypetalumCerastium brachypetalum, commonly called Gray chickweed or Gray mouse-ear chickweed, is a spring blooming annual plant species. It is native from Eurasia and introduced and naturalized in North America....
(I) - Cerastium dubium (I)
- Cerastium fontanum ssp. vulgareCerastium fontanumCerastium fontanum, also called Common mouse-ear, is a species of mat forming perennial, or rarely, annual plant. It is native to Europe but introduced elsewhere....
(I) - Cerastium glomeratumCerastium glomeratumCerastium glomeratum is a species of flowering plant in the pink family known by the common names sticky mouse-ear chickweed and clammy chickweed. It is probably native to Eurasia but it is known on most continents as an introduced species. It grows in many types of habitat. This is an annual herb...
(I) - Cerastium nutans var. nutans (N)
- Cerastium pumilum (I)
- Cerastium semidecandrum (I)
- Cerastium tomentosumCerastium tomentosumCerastium tomentosum is a herbaceous flowering plant & a member of the carnation family. It is generally distinguished from other species of its genus by "tomentose" or felty foliage. It is a low, spreading perrenial native to alpine regions of Europe. The stems & leaves are silvery-grey, whilst...
(I) - Ceratocephala testiculataCeratocephala testiculataCeratocephala testiculata is a flowering plant that is native to Eurasia. Common names include bur buttercup and curveseed butterwort. It is very small, usually only about an inch or two tall, but potentially getting up to four inches. The flowers are small and dull yellow...
(I) - Ceratophyllum demersumCeratophyllum demersumCeratophyllum demersum is a species of Ceratophyllum. It is a submerged, free-floating aquatic plant, native to North America but nowadays having a cosmopolitan distribution in temperate and tropical regions...
(N) - Ceratophyllum echinatumCeratophyllum echinatumCeratophyllum echinatum , commonly called Spineless Hornwort, is an aquatic perennial plant of the family Ceratophyllum. It can be found in ponds and lakes. It is principally an eastern North American species and the only species of its genus endemic to North America. -Description:Ceratophyllum...
(N) - Cercidiphyllum japonicumCercidiphyllum japonicumCercidiphyllum japonicum, known as the Japanese Judas-tree, is a species of flowering tree in the Cercidiphyllaceae family that commonly goes by the name Katsura tree. It is native to China and Japan. The tree is deciduous and grows to 40 to 60 feet. Its leaves are round. The tree flowers in March...
(I) - Cercis canadensis var. canadensis (N)
- Chaenomeles speciosaChaenomeles speciosaChaenomeles speciosa is a thorny deciduous or semi-evergreen shrub native to eastern Asia. It is taller than another commonly cultivated species, C. japonica, usually growing to about 2 m...
(I) - Chaenorhinum minus (I)
- Chaerophyllum procumbens var. procumbens (N)
- Chaerophyllum procumbens var. shortii (N)
- Chaerophyllum tainturieri var. tainturieri (N)
- Chaiturus marrubiastrum (I)
- Chamaecrista fasciculata var. fasciculataChamaecrista fasciculataChamaecrista fasciculata is a species of legume native to most of the eastern United States. It is an annual which grows to approximately 0.5 meters tall...
(N) - Chamaecrista nictitans ssp. nictitans var. nictitansChamaecrista nictitansChamaecrista nictitans is a herbaceous species of legume widely distributed through the temperate and tropical Americas...
(N) - Chamaecrista nictitans ssp. nictitansChamaecrista nictitansChamaecrista nictitans is a herbaceous species of legume widely distributed through the temperate and tropical Americas...
(N) - Chamaedaphne calyculata (N)
- Chamaelirium luteum (N)
- Chamaemelum mixtum (I)
- Chamaemelum nobile (I)
- Chamaesyce humistrata (N)
- Chamaesyce maculata (N)
- Chamaesyce nutans (N)
- Chamaesyce polygonifolia (N)
- Chamaesyce prostrata (N)
- Chamaesyce serpens (N)
- Chamaesyce vermiculata (N)
- Chamerion angustifolium ssp. circumvagum (N)
- Chasmanthium latifoliumChasmanthium latifoliumChasmanthium latifolium, known as Woodoats, Inland sea oats, Northern sea oats, and River oats is a grass native to the southeastern United States and northeastern Mexico; it grows as far north as Pennsylvania and Michigan, where it is a threatened species...
(N) - Chelidonium majus var. majus (I)
- Chelone glabraChelone glabraChelone glabra is a plant in the family Plantaginaceae .-Description:Chelone glabra is a herbaceous plant found in wetlands and riparian forests of eastern North America with opposite, simple leaves, on stout, upright stems. The flowers are white, borne in late summer and early fall...
(N) - Chenopodium album var. missourienseChenopodium albumChenopodium album is a fast-growing weedy annual plant in the genus Chenopodium.Though cultivated in some regions, the plant is elsewhere considered a weed...
(N) - Chenopodium album var. albumChenopodium albumChenopodium album is a fast-growing weedy annual plant in the genus Chenopodium.Though cultivated in some regions, the plant is elsewhere considered a weed...
(I) - Chenopodium ambrosioides var. ambrosioides (I)
- Chenopodium berlandieri var. bushianumChenopodium berlandieriChenopodium berlandieri, also known by the common names pitseed goosefoot, huauzontle, and lambsquarters, is an annual herbaceous plant in the goosefoot family....
(N) - Chenopodium berlandieri var. zschackiiChenopodium berlandieriChenopodium berlandieri, also known by the common names pitseed goosefoot, huauzontle, and lambsquarters, is an annual herbaceous plant in the goosefoot family....
(N) - Chenopodium botrys (I)
- Chenopodium capitatumChenopodium capitatumStrawberry Blite is an edible annual plant, also known as Blite Goosefoot, Strawberry Goosefoot, Strawberry Spinach, Indian Paint, and Indian Ink....
(N) - Chenopodium glaucum (I)
- Chenopodium glaucum (N)
- Chenopodium humile (I)
- Chenopodium humile (N)
- Chenopodium incanum var. incanum (N)
- Chenopodium muraleChenopodium muraleChenopodium murale is a species of plant in the amaranth family known by the common names Nettle-leaved Goosefoot, Australian-spinach, salt-green, sowbane, Mauer-Gänsefuß , quenopódio...
(I) - Chenopodium polyspermum var. acutifolium (I)
- Chenopodium pratericolaChenopodium pratericolaChenopodium pratericola is a species of flowering plant in the goosefoot family known by the common name desert goosefoot.It is native to much of western and central North America, where it grows in many types of open habitat, such as sagebrush, often on alkaline soils.It is an annual herb growing...
(N) - Chenopodium pumilioChenopodium pumilioChenopodium pumilio is a species of flowering plant in the amaranth family known by the common name clammy goosefoot.It is native to Australia, but it can be found in other parts of the world as an introduced species, often growing in disturbed and waste areas such as roadsides and lots...
(I) - Chenopodium simplex (N)
- Chenopodium standleyanum (N)
- Chenopodium subglabrum (N)
- Chenopodium urbicum (I)
- Chenopodium vulvariaChenopodium vulvariaStinking Goosefoot , or Notchweed, is a foul-smelling plant or weed. The plant is a member of the genus Chenopodium, the goosefoots.-Etymology:...
(I) - Chimaphila maculataChimaphila maculataChimaphila maculata is a small , perennial evergreen herb native to eastern North America and Central America, from southern Quebec west to Illinois, and south to Florida and Panama.It has dark green, variegated leaves 2-7 cm in length, and 6-26 mm in...
(N) - Chimaphila umbellata ssp. cisatlanticaChimaphila umbellataChimaphila umbellata is a small perennial flowering plant found in dry woodlands, or sandy soils. It is native throughout the cool temperate Northern Hemisphere....
(N) - Chionanthus virginicusChionanthus virginicusChionanthus virginicus is a tree native to the eastern United States, from New Jersey south to Florida, and west to Oklahoma and Texas. -Growth:...
(N) - Chloris verticillata (N)
- Chloris virgataChloris virgataChloris virgata is a species of grass known by the common names feather fingergrass and feather windmillgrass. It is native to many of the warmer temperate, subtropical, and tropical regions of the world, including parts of Eurasia, Africa, and the Americas, and it is present in many other areas as...
(N) - Chorispora tenellaChorispora tenellaChorispora tenella is a species of plant in the mustard family known by several common names, including purple mustard, blue mustard, musk mustard, and crossflower. This mustard is native to Eurasia but is well-known in other parts of the world, particularly in temperate regions, as an introduced...
(I) - Chrysanthemum × morifolium (I)
- Chrysogonum virginianum var. virginianumChrysogonum virginianumChrysogonum virginianum is a perennial ornamental herb native of United States, which is usually propagated by root cuttings.-External links:***...
(N) - Chrysopsis marianaChrysopsis marianaChrysopsis mariana, known as the Maryland golden-aster, is a plant in the Chrysopsis genus. The Maryland golden-aster ranges from south Ohio to Pennsylvania and Long Island, New York, and the Soldiers Delight Natural Environmental Area in Maryland. Compared to other asters, the Maryland...
(N) - Chrysosplenium americanum (N)
- Cichorium intybus (I)
- Cicuta bulbifera (N)
- Cicuta maculata var. maculataCicuta maculataCicuta maculata is a species of flowering plant in the carrot family known by several common names, including spotted water hemlock, spotted parsley, spotted cowbane, and the suicide root by the Iroquois. It is native to nearly all of North America, from northern Canada to southern Mexico...
(N) - Cinna arundinacea (N)
- Cinna latifoliaCinna latifoliaCinna latifolia is a species of grass known by the common name drooping woodreed. It is a native bunchgrass to the Northern Hemisphere, where it has a circumboreal distribution. It grows in moist habitat, such as forest understory and riverbanks. It reaches nearly two meters in maximum height...
(N) - Circaea alpina ssp. alpina (N)
- Circaea × intermedia (N)
- Circaea lutetiana ssp. canadensisCircaea lutetianaCircaea lutetiana is a plant in the evening primrose family, Onagraceae.The genus name comes from the enchantress Circe of Greek mythology and the generic designation is derived from Lutetia, the Latin name for Paris. Paris at one time was known as the "Witch City"...
(N) - Cirsium altissimum (N)
- Cirsium arvenseCirsium arvenseCirsium arvense is a species of Cirsium, native throughout Europe and northern Asia, and widely introduced elsewhere. The standard English name in its native area is Creeping Thistle.-Alternate names:...
(I) - Cirsium canescens (N)
- Cirsium carolinianum (N)
- Cirsium discolorCirsium discolorCirsium discolor is a species of thistle in the genus Cirsium. Field thistle has a pink or lavender flower that blooms in late summer/early fall. Field thistle is common and lives in most moist areas of eastern North America....
(N) - Cirsium muticum (N)
- Cirsium pumilum (N)
- Cirsium vulgareCirsium vulgareCirsium vulgare is a species of the genus Cirsium, native throughout most of Europe , western Asia , and northwestern Africa...
(I) - Citrullus lanatus var. lanatus (I)
- Cladium mariscoides (N)
- Cladrastis kentukea (N)
- Clarkia pulchellaClarkia pulchellaClarkia pulchella also known as pinkfairies, ragged robin, and deerhorn clarkia is a species of flowering plant in the Onagraceae family. This wildflower is found in the Pacific Northwest and is the type species of Clarkia...
(N) - Claytonia caroliniana var. caroliniana (N)
- Claytonia virginica var. virginicaClaytonia virginicaClaytonia virginica, the Eastern spring beauty, Virginia spring beauty, or fairy-spuds, is a flowering plant in the family Portulacaceae, native to eastern North America. It is found in moist woods and clearings. It is a trailing plant growing to 5-40 cm long. The leaves are slender lanceolate,...
(N) - Clematis occidentalis var. occidentalisClematis occidentalisClematis occidentalis is a species of flowering plant in the buttercup family known by the common name western blue virginsbower. It is native to much of southern Canada and the northern United States. There are three varieties: var. occidentalis is limited to the eastern half of the species'...
(N) - Clematis ternifloraClematis ternifloraClematis terniflora is a plant in the buttercup family, Ranunculaceae. It is native to Asia, but is cultivated in gardens and has naturalized in parts of North America. It is considered an invasive plant in some locations....
(I) - Clematis viorna (N)
- Clematis virginianaClematis virginianaClematis virginiana Clematis virginiana Clematis virginiana (also known as Devil's Darning Needles, Devil's Hair, Love Vine, Traveller's Joy, Virgin's Bower, Virginia Virgin's Bower, Wild Hops , and Woodbine; syn. Clematis virginiana L. var...
(N) - Cleome hasslerianaCleome hasslerianaCleome hassleriana, commonly known as spider flower or spider plant, is a species of Cleome, native to southern South America in Argentina, Paraguay, Uruguay, and southeast Brazil....
(I) - Cleome serrulata (N)
- Clinopodium arkansanum (N)
- Clinopodium vulgare (N)
- Clintonia borealis (N)
- Clintonia umbellulataClintonia umbellulataClintonia umbellulata is a perennial herb of the Lilly family. It is found in the deciduous forests of the southeast United States and blooms in the late spring....
(N) - Clitoria mariana (N)
- Coix lacryma-jobi (I)
- Collinsia vernaCollinsia vernaCollinsia verna is an annual wildflower common in eastern North America, where it is known as blue-eyed Mary. The flowers are actually bicolored white and blue. It is a plant of valley bottoms and moist bottom slopes, in areas of moderate light; it is not a shade lover....
(N) - Collinsonia canadensisCollinsonia canadensisCollinsonia canadensis is a perennial medicinal herb in the mint family. Common names include Canada Horsebalm, Richweed, Hardhack, Heal-All, Horseweed, Ox-Balm and Stone root. It is native to eastern North America from Quebec south to Florida and as far west as Missouri, although it is mainly...
(N) - Collinsonia verticillata (N)
- Collomia linearisCollomia linearisCollomia linearis is a species of flowering plant in the phlox family known by the common names tiny trumpet and slenderleaf collomia. This tiny wildflower is native to North America where it is fairly widespread across the north and west. It is an annual herb with a velvety erect stem bearing...
(N) - Colutea arborescensColutea arborescensColutea arborescens is a species of leguminous shrub known by the common name bladder senna. It is native to Europe and North Africa, but it is known on other continents where it is grown as an ornamental and used in landscaping for erosion control. It is also known in the wild as an occasionally...
(I) - Comandra umbellata ssp. umbellata (N)
- Comarum palustre (N)
- Commelina communisCommelina communisCommelina communis, commonly known as the Asiatic dayflower, is an herbaceous annual plant in the dayflower family. It is native throughout much of East Asia and northern parts of Southeast Asia. In China, the plant is known as yazhicao , roughly translating to "duckfoot herb", while in Japan it...
(I) - Commelina diffusa var. diffusaCommelina diffusaCommelina diffusa, sometimes known as the climbing dayflower or spreading dayflower, is a pantropical herbaceous plant in the dayflower family. It has been introduced to the southeastern United States where it is most common in wet disturbed soils. There are two recognised varieties, one being the...
(N) - Commelina virginicaCommelina virginicaCommelina virginica, commonly known as the Virginia dayflower, is a perennial herbaceous plant in the dayflower family. It is native to the mideastern and southeastern United States, where it is typical of wet soils. While most members of the genus have thin, fibrous roots, the Virginia dayflower...
(N) - Comptonia peregrina (N)
- Conioselinum chinense (N)
- Conium maculatum (I)
- Conoclinium coelestinum (N)
- Conopholis americanaConopholis americanaConopholis americana, American cancer-root or squawroot or bear corn, is a perennial, non-photosynthesizing parasitic plant, from the family Orobanchaceae and more recently from the genus Conopholis but also listed as Orobanche, native but not endemic to North America and when blooming, resembles...
(N) - Conringia orientalisConringia orientalisConringia orientalis is a species of flowering plant in the mustard family known by the common name hare's ear mustard. It is native to Eurasia but it is known elsewhere as an introduced species and sometimes a noxious weed...
(I) - Consolida ajacis (I)
- Consolida regalis (I)
- Convallaria majalis (I)
- Convolvulus arvensisConvolvulus arvensisConvolvulus arvensis is a species of bindweed, native to Europe and Asia. It is a climbing or creeping herbaceous perennial plant growing to 0.5–2 m high. The leaves are spirally arranged, linear to arrowhead-shaped, 2–5 cm long and alternate, with a 1–3 cm petiole...
(I) - Conyza canadensis var. canadensisConyza canadensisConyza canadensis is an annual plant native throughout most of North America and Central America. Common names include Horseweed, Canadian Horseweed, Canadian Fleabane, Coltstail, Marestail and Butterweed.It is an annual plant growing to 1.5 m tall, with sparsely hairy stems...
(N) - Conyza canadensis var. pusillaConyza canadensisConyza canadensis is an annual plant native throughout most of North America and Central America. Common names include Horseweed, Canadian Horseweed, Canadian Fleabane, Coltstail, Marestail and Butterweed.It is an annual plant growing to 1.5 m tall, with sparsely hairy stems...
(N) - Conyza ramosissima (N)
- Coptis trifoliaCoptis trifoliaThreeleaf Goldthread or Savoyane is a perennial plant in the genus Coptis, a member of the Ranunculaceae family.It has one small, deeply three-lobed, evergreen leaf rising from the ground....
(N) - Corallorhiza maculata var. maculata (N)
- Corallorhiza odontorhiza var. odontorhiza (N)
- Corallorhiza trifidaCorallorhiza trifidaCorallorhiza trifida, commonly known as early coralroot, northern coralroot, or yellow coralroot, is a coralroot orchid native to North America and Eurasia, with a circumboreal distribution.-Description:...
(N) - Corallorhiza wisterianaCorallorhiza wisterianaSpring coralroot — also called Arousing coralroot — is a species of coralroot orchid.-External links:*...
(N) - Coreopsis grandiflora var. harveyanaCoreopsis grandifloraCoreopsis grandiflora is a perennial plant species of the tickseed genus, Coreopsis, in Asteraceae. The common name is large-flowered tickseed....
(N) - Coreopsis lanceolata (N)
- Coreopsis majorCoreopsis majorCoreopsis major is a plant species of the genus coreopsis in Asteraceae. Coreopsis species are commonly called tick seeds....
(N) - Coreopsis tinctoria var. tinctoria (N)
- Coreopsis tripterisCoreopsis tripterisCoreopsis tripteris is a plant species of the genus Coreopsis in Asteraceae. Coreopsis species are commonly called tickseeds. This species is one of the tallest growing coreopsis and plants bloom late summer into fall. Native from Eastern and Central United States, were it is found growing in...
(N) - Coreopsis verticillataCoreopsis verticillataCoreopsis verticillata is a perennial plant of the genus Coreopsis in Asteraceae. The common names of the species are whorled coreopsis, thread-leaved tickseed, thread leaf coreopsis, and pot-of-gold....
(N) - Coriandrum sativum (I)
- Corispermum americanum var. americanum (N)
- Corispermum pallasii (I)
- Corispermum pallasii (N)
- Cornus alternifolia (N)
- Cornus amomumCornus amomumCornus amomum is a species of dogwood native to eastern North America, from Ontario and Quebec south to Arkansas and Georgia. Also found in other parts of North America....
(N) - Cornus × arnoldiana (N)
- Cornus canadensisCornus canadensisCornus canadensis is a herbaceous member of the Cornaceae family...
(N) - Cornus drummondiiCornus drummondiiCornus drummondii, commonly known as the Roughleaf Dogwood, is a small deciduous tree that is native primarily to the Great Plains and Midwestern reigons of the United States. It is also found around the Mississippi River. It is uncommon in the wild, and is mostly found around forest borders...
(N) - Cornus florida (N)
- Cornus obliqua (N)
- Cornus racemosa (N)
- Cornus rugosa (N)
- Cornus sericea ssp. sericea (N)
- Coronilla scorpioides (I)
- Coronopus didymusCoronopus didymusCoronopus didymus is a species of Coronopus, which is a genus of plants in the Brassicaceae .It is called Pitapara in Hindi and Jangli Halon in Urdu. It is easily recognizable by its spreading stems, pinnate leaves, and biglobose fruits. It flowers between April and October...
(I) - Corydalis aureaCorydalis aureaCorydalis aurea is a winter annual native to North America.Root is a branching caudex...
(N) - Corydalis flavulaCorydalis flavulaCorydalis flavula is an annual plant native to the eastern United States.-External links:**...
(N) - Corydalis sempervirens (N)
- Corylus americanaCorylus americanaCorylus americana, the American Hazelnut, is a species of the genus Corylus that is native to eastern North America.It is a medium to large shrub that under some conditions can take the form of a small tree...
(N) - Corylus cornuta var. cornuta (N)
- Cosmos bipinnatusCosmos bipinnatusCosmos bipinnatus, commonly called the garden cosmos or Mexican aster, is a medium sized flowering herbaceous plant native to Mexico. The species and its varieties and cultivars are popular as an ornamental plant in temperate climate gardens...
(I) - Cotinus coggygria (I)
- Cotoneaster divaricatus (I)
- Cotoneaster simonsii (I)
- Crataegus × anomala (N)
- Crataegus apiomorphaCrataegus apiomorphaCrataegus apiomorpha is a species of hawthorn.-References and external links:*...
(N) - Crataegus arboreaCrataegus arboreaCrataegus arborea, the Montgomery hawthorn, is a species of hawthorn of a shrub or tree size, native to the eastern United States in North America.-Distribution:...
(N) - Crataegus aterCrataegus aterCrataegus ater, known as the Nashville Hawthorn, is a species of hawthorn that grows as a shrub or tree, native to the Great Lakes region of North America.-Distribution:...
(N) - Crataegus beata (N)
- Crataegus brainerdii (N)
- Crataegus calpodendronCrataegus calpodendronCrataegus calpodendron is a species of hawthorn native to much of the eastern US and to Ontario, Canada. The common name late hawthorn refers to the flowering time, which is later than most North American hawthorns.-References and external links:...
(N) - Crataegus chrysocarpa var. chrysocarpaCrataegus chrysocarpaCrataegus chrysocarpa is a species of hawthorn that is native to much of the continental US and Canada. Common names fireberry hawthorn and goldenberry hawthorn, as well as the scientific name all refer to the colour of the unripe fruit, although the mature fruit is red.Three varieties C....
(N) - Crataegus coleae (N)
- Crataegus compacta (N)
- Crataegus comptaCrataegus comptaCrataegus compta is a hawthorn native to the northeastern U.S. and southeastern Canada.-References and external links:*...
(N) - Crataegus corusca (N)
- Crataegus crus-galliCrataegus crus-galliCrataegus crus-galli is a species of hawthorn known by the common names cockspur hawthorn and cockspur thorn. It is native to eastern North America from Ontario to Texas to Florida, and it is widely used in horticulture. This is a small tree growing up to about 10 meters tall and 8 meters wide,...
(N) - Crataegus disperma (N)
- Crataegus dissona (N)
- Crataegus engelmannii (N)
- Crataegus flabellataCrataegus flabellataCrataegus flabellata is a species of hawthorn known by the common name fanleaf hawthorn. It is native to the northeastern U.S. and adjacent Canada. It is intermediate in appearance between C. macrosperma and C. chrysocarpa. C. macrosperma, which occurs throughout the range of C. flabellata and also...
(N) - Crataegus holmesianaCrataegus holmesianaCrataegus holmesiana is a species of hawthorn that is closely related to Scarlet Hawthorn, C. coccinea , but with more elongated fruit and leaves.-References and external links:***...
(N) - Crataegus × hudsonica (N)
- Crataegus × immanis (N)
- Crataegus indicens (N)
- Crataegus intricataCrataegus intricataCrataegus intricata is a species of hawthorn known by the common names Copenhagen hawthorn and thicket hawthorn. It is native to eastern Canada and the eastern United States. Its fruit are brown to red.-References and external links:* **...
(N) - Crataegus iracundaCrataegus iracundaCrataegus iracunda is a species of hawthorn, sometimes called the stolonbearing hawthorn. It was described in 1899 by Chauncey Delos Beadle of the Biltmore Herbarium in North Carolina.- External links :...
(N) - Crataegus irrasa (N)
- Crataegus jesupii (N)
- Crataegus lucorum (N)
- Crataegus macrospermaCrataegus macrospermaCrataegus macrosperma is a species of hawthorn native to most of the eastern U.S. and adjacent Canada, though uncommon at lower altitudes in the south. It is sometimes misidentified as C. flabellata.-References and external links:*...
(N) - Crataegus margarettiae (N)
- Crataegus mollisCrataegus mollisCrataegus mollis, known as Downy Hawthorn or Red Hawthorn, occurs in eastern North America from southeastern North Dakota east to Nova Scotia and southwest to eastern Texas. This tree inhabits wooded bottomlands, the prairie border, and the midwest savanna understorey.This tree grows to 10–13 m...
(N) - Crataegus monogyna (I)
- Crataegus nitida (N)
- Crataegus pedicellataCrataegus pedicellataCrataegus pedicellata is a name for a species of Hawthorn that has been shown to be the same as C. coccinea L., common name "Scarlet Hawthorn". Under the International Code of Botanical Nomenclature, the older name should be used. Considerable confusion persists, however, because the name C...
(N) - Crataegus pennsylvanica (N)
- Crataegus persimilis (N)
- Crataegus phaenopyrumCrataegus phaenopyrumCrataegus phaenopyrum is a species of hawthorn commonly known as Washington Hawthorn or Washington Thorn. It is widely grown as an ornamental plant, and can reach 10 m in height. The small red berry-like fruit grow closely together in large clusters and are food for squirrels and birds. They have a...
(N) - Crataegus pringlei (N)
- Crataegus prona (N)
- Crataegus pruinosaCrataegus pruinosaCrataegus pruinosa is a species of hawthorn known by the common name frosted hawthorn. It is native to a wide area of the eastern US and southern Canada, and is sometimes considered to be several species, rather than just one....
(N) - Crataegus punctataCrataegus punctataCrataegus punctata is a species of hawthorn known by the common names dotted hawthorn or white haw that is native to most of the eastern U.S. and eastern Canada. It is the state flower of Missouri....
(N) - Crataegus scabridaCrataegus scabridaCrataegus scabrida is a species of hawthorn.- External links :*...
(N) - Crataegus schuettei (N)
- Crataegus submollisCrataegus submollisCrataegus submollis is a species of hawthorn that grows to about 10 m in height and typically carries large crops of red fruit.This species is closely related to C. mollis, but the two species have separate native ranges. Amongst other differences between these two species, C. mollis has...
(N) - Crataegus suborbiculata (N)
- Crataegus succulentaCrataegus succulentaCrataegus succulenta is a species of hawthorn known by the common names fleshy hawthorn and succulent hawthorn. It is "the most wide-ranging hawthorn in North America", native to much of southern Canada, and the United States as far south as Arizona, New Mexico, Kansas, Missouri, North Carolina,...
(N) - Crataegus tanuphylla (N)
- Crataegus unifloraCrataegus unifloraCrataegus uniflora is a species of hawthorn known by the common name one-flowered hawthorn, or dwarf hawthorn. It is native to parts of the southeastern US. The plant is usually a small bush, but some forms can be a few meters tall. The flowers occur singly or in small clusters. The fruit are hairy...
(N) - Crepis biennis (I)
- Crepis capillaris (I)
- Crepis nicaeensis (I)
- Crepis pulchra (I)
- Crepis setosa (I)
- Crepis tectorumCrepis tectorumThe Narrowleaf Hawksbeard, Crepis tectorum, is a annual or winter annual plant ranging from 30-100cm in height. It is an invasive species and during maturity it has one main stem, which is branched, hairless, and leafy. The leaves are arranged in an alternate manner and are less than 0.5 inches...
(I) - Crotalaria sagittalis (N)
- Croton capitatus var. capitatus (N)
- Croton glandulosus var. septentrionalis (N)
- Croton monanthogynus (N)
- Cruciata pedemontana (I)
- Crypsis schoenoidesCrypsis schoenoidesCrypsis schoenoides is a species of grass known by the common names swamp pricklegrass, swamp timothy, and cowpond grass. This grass is native to Europe but it is present in most other continents where it was introduced and took hold. This is an annual grass with purple-tinted green stems which...
(I) - Cryptotaenia canadensis (N)
- Cucumis melo (I)
- Cucumis sativus (I)
- Cucurbita foetidissimaCucurbita foetidissimaCucurbita foetidissima is a xerophytic tuberous plant found in the southwestern USA and northwestern Mexico. A member of the cucumber family, the fruit is consumed by humans and animals. The fruit is eaten cooked like a squash when very young...
(N) - Cucurbita maximaCucurbita maximaCucurbita maxima, one of at least five species of cultivated squash, is one of the most diverse domesticated species, perhaps with more cultivated forms than any other crop. This species originated in South America from the wild C. maxima ssp. andreana over 4000 years ago...
(I) - Cucurbita pepoCucurbita pepoThe species Cucurbita pepo is a cultivated plant of the genus Cucurbita. It includes varieties of squash, gourd, and pumpkin.*Acorn squash*Delicata squash*Dodi marrow, grown in South Asia*Gem squash*Heart of gold squash*Pattypan squash...
(N) - Cucurbita pepo var. pepoCucurbita pepoThe species Cucurbita pepo is a cultivated plant of the genus Cucurbita. It includes varieties of squash, gourd, and pumpkin.*Acorn squash*Delicata squash*Dodi marrow, grown in South Asia*Gem squash*Heart of gold squash*Pattypan squash...
(I) - Cunila origanoides (N)
- Cuphea viscosissimaCuphea viscosissimaCuphea viscosissima, also known as blue waxweed, clammy cuphea or as "tarweed", is a plant native to the United States. It is a potential source of edible oil for humans....
(N) - Cuscuta cephalanthi (N)
- Cuscuta compacta var. compacta (N)
- Cuscuta coryli (N)
- Cuscuta epilinum (I)
- Cuscuta epithymumCuscuta epithymumCuscuta epithymum L., is a parasitic plant assigned to the Cuscutaceae or Convolvulaceae family, depending on the taxonomy. It is red-pigmented, not being photosynthetically active. It has a filiform habit, like a group of yarns...
(I) - Cuscuta glomerata (N)
- Cuscuta gronovii var. gronovii (N)
- Cuscuta pentagona var. pentagonaCuscuta pentagonaCuscuta pentagona is a parasitic plant which is placed in the family Convolvulaceae, but was formerly classified in the family Cuscutaceae. It is a parasite of a wide range of herbaceous plants but is most important as a pest of lucerne and other legumes....
(N) - Cuscuta polygonorum (N)
- Cuscuta suaveolens (I)
- Cyclachaena xanthifolia (N)
- Cycloloma atriplicifolium (N)
- Cydonia oblonga (I)
- Cymbalaria muralis (I)
- Cynanchum laeveCynanchum laeveCynanchum laeve is a vining perennial herb native to eastern and central U.S. states and Ontario. Common names include honeyvine, honeyvine milkweed, bluevine milkweed, climbing milkweed, and smooth swallow-wort.Like bindweed and some other members of the Convolvulaceae, Cynanchum laeve is a...
(N) - Cynanchum louiseaeCynanchum louiseaeCynanchum louiseae, a species in the milkweed family, is also known as Black swallow-wort, Louise's swallow-wort., or Black dog-strangling vine, Cynanchum louiseae is a species of plant that is native to Europe and is found primarily in Italy, France, Portugal, and Spain...
(I) - Cynodon dactylonCynodon dactylonCynodon dactylon , also known as Dūrvā Grass, Bermuda Grass, Dubo, Dog's Tooth Grass, Bahama Grass, Devil's Grass, Couch Grass, Indian Doab, Arugampul, Grama, and Scutch Grass, is a grass native to north and east Africa, Asia and Australia and southern Europe...
(I) - Cynoglossum officinaleCynoglossum officinaleCynoglossum officinale is a herbaceous plant of the family Boraginaceae, found in most parts of Europe, and also North America where it was accidentally introduced.-Growth:It can be either annual or biennial, with reddish-purple flowers blooming between May and...
(I) - Cynoglossum virginianum var. boreale (N)
- Cynoglossum virginianum var. virginianum (N)
- Cynosurus cristatusCynosurus cristatus-Introduction:Crested Dog’s-tail is an ornamental plant, but also found in the wild typically in species rich grassland. It is a perennial short-lived plant characterised by a seed head that is flat on one side. It thrives in a variety of soil types but avoids the acid and calcerous extremes of...
(I) - Cynosurus echinatusCynosurus echinatusCynosurus echinatus is a species of grass known by the common names bristly dogtail grass and hedgehog dogtail. It is native to southern Europe, and it is known in the Americas and Australia as an introduced species and sometimes a noxious weed. An herbicide-resistant strain can be found growing as...
(I) - Cyperus acuminatusCyperus acuminatusCyperus acuminatus is a common species of sedge known by several common names, including tapertip flatsedge and pale umbrella-sedge. This plant is native to North America, where its distribution spans the continent, except northern Canada and southern Mexico. It is found in wet areas from large...
(N) - Cyperus amuricus (I)
- Cyperus bipartitusCyperus bipartitusCyperus bipartitus is a common species of sedge known by several common names, including shining flatsedge and river cyperus. The name "slender flatsedge" is also sometimes used but more properly applies to Cyperus gracilis. C...
(N) - Cyperus compressus (N)
- Cyperus diandrus (N)
- Cyperus echinatusCyperus echinatusCyperus echinatus is a species of plant in the sedge family. It is native to most of eastern North America....
(N) - Cyperus erythrorhizosCyperus erythrorhizosCyperus erythrorhizos is a species of sedge known by the common name redroot flatsedge. It is found throughout North America from central Canada to central Mexico. It is a plant of wet areas such as rivers and ditches, generally at low elevations. It gets its common and scientific names from the...
(N) - Cyperus esculentusCyperus esculentusCyperus esculentus is a species of sedge native to warm temperate to subtropical regions of the Northern Hemisphere, often cultivated for its edible tubers . It is an annual or perennial plant, growing to 90 cm tall, with solitary stems growing from a tuber...
(N) - Cyperus esculentus var. leptostachyusCyperus esculentusCyperus esculentus is a species of sedge native to warm temperate to subtropical regions of the Northern Hemisphere, often cultivated for its edible tubers . It is an annual or perennial plant, growing to 90 cm tall, with solitary stems growing from a tuber...
(I) - Cyperus flavescens (N)
- Cyperus houghtonii (N)
- Cyperus iriaCyperus iriaCyperus iria is a smooth, tufted sedge found worldwide. The roots are yellowish-red and fibrous. The plant often grows in rice paddies, where it is considered to be a weed....
(I) - Cyperus lancastriensis (N)
- Cyperus lupulinus ssp. lupulinus (N)
- Cyperus lupulinus ssp. macilentus (N)
- Cyperus odoratusCyperus odoratusCyperus odoratus is a species of sedge known by the common names fragrant flatsedge and rusty flatsedge. This plant can be found in much of the tropical and warm temperate world, including South, Central, and North America, much of Asia and the Pacific, Australia, and parts of Africa. It is a plant...
(N) - Cyperus refractus (N)
- Cyperus retrofractus (N)
- Cyperus schweinitzii (N)
- Cyperus squarrosusCyperus squarrosusCyperus squarrosus is a species of sedge known by several common names, including bearded flatsedge and awned flatsedge. It is found in wet environments nearly worldwide. It is a small sedge, reaching a maximum height between 10 and 16 centimeters. There are one to three short, thin leaves around...
(N) - Cyperus strigosusCyperus strigosusCyperus strigosus is a species of sedge known by the common names false nutsedge and straw-colored flatsedge. It is native to most of the United States and Canada, where it grows in wet areas in many habitat types, including disturbed and cultivated areas such as roadsides and crop fields. It is...
(N) - Cypripedium acauleCypripedium acauleCypripedium acaule is a member of the orchid genus Cypripedium. Members of this genus are commonly referred to as lady's slipper orchids. First described in 1700, C. acaule is commonly referred to as the Pink Lady's Slipper, Stemless Lady's-slipper, or Moccasin Flower...
(N) - Cypripedium × andrewsii var. andrewsii (N)
- Cypripedium × andrewsii var. landonii (N)
- Cypripedium candidumCypripedium candidumCypripedium candidum, also known as Small White Lady's Slipper or White Lady's Slipper, is a rare orchid of the Cypripedium genus. It is found in wet prairies and fens, in rich, highly calcareous soils, sedge meadow edges, calcareous roadside and railway ditches. Cypripedium candidum grows to a...
(N) - Cypripedium parviflorum var. parviflorumCypripedium parviflorumCypripedium parviflorum, commonly known as Yellow Lady's Slipper or Mocassin Flower is a Lady's Slipper orchid found in North America.-External links:* * , Digital Flora of Newfoundland and Labrador...
(N) - Cypripedium parviflorum var. pubescensCypripedium parviflorumCypripedium parviflorum, commonly known as Yellow Lady's Slipper or Mocassin Flower is a Lady's Slipper orchid found in North America.-External links:* * , Digital Flora of Newfoundland and Labrador...
(N) - Cypripedium reginaeCypripedium reginaeThe Showy Lady's-slipper , also known as the Pink-and-white Lady's-slipper or the Queen's Lady's-slipper, is a rare terrestrial temperate lady's-slipper orchid native to northern North America....
(N) - Cyrtomium falcatumCyrtomium falcatumCyrtomium falcatum is a species of fern known by the common name Japanese holly fern. It is native to eastern Asia.It grows from crevices, coastal cliffs, streambanks, rocky slopes, and other moist, stable areas.-Description:...
(I) - Cystopteris bulbiferaCystopteris bulbiferaCystopteris bulbifera ' is a low-growing rock fern with creeping stems and narrow elongate deltate fronds which grow to 75 cm , native to eastern North America with two disjunct populations in the west. It is found only on calcareous substrates such as limestone. It commonly festoons limestone cave...
(N) - Cystopteris fragilisCystopteris fragilisCystopteris fragilis is a species of fern known by the common names brittle bladderfern and common fragile fern. It can be found worldwide, generally in shady, moist areas. The leaves are up to 30 or 40 centimeters long and are borne on fleshy petioles. Each leaf is divided into many pairs of...
(N) - Cystopteris × illinoensis (N)
- Cystopteris protrusaCystopteris protrusaCystopteris protrusa is a common fern of eastern North America. Throughout much of its range, it is the most common Cystopteris. It is commonly known as the lowland brittle fern or lowland fragile fern...
(N) - Cystopteris tennesseensis (N)
- Cystopteris tenuisCystopteris tenuisCystopteris tenuis is sometimes known as Mackay's bladder fern or Mackay's fragile fern. It was long considered to be a part of the superspecies for fragile ferns, as Cystopteris fragilis Bernh. var. mackayi Lawson....
(N) - Cystopteris × wagneri (N)
- Cytisus scoparius var. scopariusCytisus scopariusCytisus scoparius, the Common Broom and Scotch Broom, syn. Sarothamnus scoparius, is a perennial leguminous shrub native to western and central Europe,....
(I)
D
- Dactylis glomerata ssp. glomerataDactylis glomerataDactylis glomerata, Cock's-foot and orchard grass, is a common species of grass in the genus Dactylis, native throughout most of Europe, temperate Asia, and northern Africa.-Distribution:...
(I) - Dactyloctenium aegyptiumDactyloctenium aegyptiumDactyloctenium aegyptium, or Egyptian crowfoot grass is a member of the family Poaceae native in Africa. The plant mostly grows in heavy soils at damp sites.-Description:...
(I) - Dactylorhiza viridis (N)
- Dalea leporina (N)
- Dalea purpurea var. purpureaDalea purpureaDalea purpurea is a species of flowering plant in the legume family known by the common name purple prairie clover, better written as "prairie-clover," in recognition of the fact that it is not a true clover...
(N) - Dalibarda repensDalibarda repensDalibarda repens is a perennial plant in the Rose family, Rosaceae. It is the only species in its genus, which is closely allied with the genus Rubus...
(N) - Danthonia compressa (N)
- Danthonia spicata (N)
- Daphne mezereumDaphne mezereumDaphne mezereum is a species of Daphne in the flowering plant family Thymelaeaceae, native to most of Europe and Western Asia, north to northern Scandinavia and Russia. In southern Europe it is confined to medium to higher elevations and in the subalpine vegetation zone, but descends to near sea...
(I) - Dasiphora fruticosa ssp. floribunda (N)
- Dasistoma macrophylla (N)
- Datura stramoniumDatura stramoniumDatura stramonium, known by the common names Jimson weed, devil's trumpet, devil's weed, thorn apple, tolguacha, Jamestown weed, stinkweed, locoweed, datura, pricklyburr, devil's cucumber, Hell's Bells, moonflower and, in South Africa, malpitte and mad seeds, is a common weed in the...
(I) - Datura wrightiiDatura wrightiiDatura wrightii or Sacred Datura is the name of a poisonous perennial plant and ornamental flower of southwestern North America. It is sometimes used as a hallucinogen. Datura wrightii is classified as a deliriant and an anticholinergic....
(N) - Daucus carota (I)
- Decodon verticillatusDecodon verticillatusDecodon verticillatus, the sole species in the genus Decodon, is a flowering plant in the Lythraceae family. It is commonly known as waterwillow or swamp loosestrife. It is endemic to wetlands in the eastern half of the United States.-Description:Waterwillow is a clump-forming shrubby perennial...
(N) - Delphinium exaltatum (N)
- Delphinium tricorne (N)
- Dennstaedtia punctilobulaDennstaedtia punctilobulaDennstaedtia punctilobula is a species of fern native to eastern North America, from Newfoundland west to Wisconsin and Arkansas, and south in the Appalachian Mountains to northern Alabama; it is most abundant in the east of its range, with only scattered populations in the west.It is a deciduous...
(N) - Deparia acrostichoidesDeparia acrostichoidesThe silvery glade fern is a common fern in stream bottoms throughout much of the eastern United States. It often forms extensive colonies, growing from creeping crowns...
(N) - Deschampsia cespitosa (N)
- Deschampsia danthonioidesDeschampsia danthonioidesDeschampsia danthonioides is a species of grass known by the common name annual hairgrass. It is native to western North America from British Columbia to Baja California, and southern South America in Chile and Argentina....
(N) - Deschampsia flexuosa var. flexuosaDeschampsia flexuosa-Introduction:Deschampsia flexuosa Trin. or Wavy Hair-grass is a species of bunchgrass in the Poaceae family with a Holarctic distribution.-Habitat and distribution:...
(N) - Descurainia pinnata ssp. brachycarpaDescurainia pinnataDescurainia pinnata is a species of flowering plant in the mustard family known by the common name western tansymustard. It is native to North America, where it is widespread and found in varied habitats. It is especially successful in deserts. It is a hardy plant which easily becomes weedy, and...
(N) - Descurainia sophia (I)
- Desmanthus illinoensisDesmanthus illinoensisDesmanthus illinoensis is a plant in many areas of the south central US.Root bark of D...
(N) - Desmodium canadenseDesmodium canadenseDesmodium canadense is a native North American forb of the Fabaceae family.- External links :* *...
(N) - Desmodium canescens (N)
- Desmodium ciliare var. ciliare (N)
- Desmodium cuspidatum var. cuspidatum (N)
- Desmodium cuspidatum var. longifolium (N)
- Desmodium glutinosum (N)
- Desmodium illinoense (N)
- Desmodium laevigatum (N)
- Desmodium marilandicum (N)
- Desmodium nudiflorum (N)
- Desmodium obtusum (N)
- Desmodium paniculatum var. paniculatumDesmodium paniculatumDesmodium paniculatum, or Panicled Tick-Trefoil, is a flowering plant located in the United States....
(N) - Desmodium pauciflorum (N)
- Desmodium perplexum (N)
- Desmodium rotundifolium (N)
- Desmodium sessilifolium (N)
- Desmodium viridiflorum (N)
- Dianthus armeria (I)
- Dianthus barbatus (I)
- Dianthus deltoides (I)
- Dianthus plumarius (I)
- Diarrhena americanaDiarrhena americanaDiarrhena americana, also known as American beak grass or American beakgrain, is a native, perennial grass of North America,, where it grows in rich, moist woodlands from Missouri to Maryland and south to Oklahoma and Alabama. It is considered to be threatened in Michigan, and is listed as...
(N) - Diarrhena obovata (N)
- Dicentra canadensisDicentra canadensisDicentra canadensis, or squirrel corn, is a herbaceous plant in the fumitory family with small yellow clustered bulblets, finely dissected leaves, and white heart-shaped flowers, native to deciduous woodland in eastern North America.-References:...
(N) - Dicentra cucullariaDicentra cucullariaDicentra cucullaria is a perennial herbaceous plant, native to rich woods of eastern North America, with a disjunct population in the Columbia River Basin....
(N) - Dicentra eximiaDicentra eximiaDicentra eximia is a herbaceous perennial growing from rhizomes, native to rocky woodland and bases of cliffs in the Appalachians from Pennsylvania south.-Description:...
(N) - Dichanthelium acuminatum var. acuminatumDichanthelium acuminatumDichanthelium acuminatum is a species of grass from the genus Dichanthelium, in North America.D. acuminatum forms a hybridization complex with other Dichanthelium species such as D. dichotomum, D. sphaerocarpon, D. ovale, and D. aciculare....
(N) - Dichanthelium acuminatum var. fasciculatumDichanthelium acuminatumDichanthelium acuminatum is a species of grass from the genus Dichanthelium, in North America.D. acuminatum forms a hybridization complex with other Dichanthelium species such as D. dichotomum, D. sphaerocarpon, D. ovale, and D. aciculare....
(N) - Dichanthelium acuminatum var. lindheimeriDichanthelium acuminatumDichanthelium acuminatum is a species of grass from the genus Dichanthelium, in North America.D. acuminatum forms a hybridization complex with other Dichanthelium species such as D. dichotomum, D. sphaerocarpon, D. ovale, and D. aciculare....
(N) - Dichanthelium boreale (N)
- Dichanthelium boscii (N)
- Dichanthelium clandestinum (N)
- Dichanthelium commutatum (N)
- Dichanthelium depauperatum (N)
- Dichanthelium dichotomum var. dichotomum (N)
- Dichanthelium latifolium (N)
- Dichanthelium laxiflorum (N)
- Dichanthelium leibergii (N)
- Dichanthelium linearifolium (N)
- Dichanthelium longiligulatum (N)
- Dichanthelium meridionale (N)
- Dichanthelium oligosanthes var. oligosanthes (N)
- Dichanthelium oligosanthes var. scribnerianum (N)
- Dichanthelium ovale var. addisonii (N)
- Dichanthelium sabulorum var. patulum (N)
- Dichanthelium sabulorum var. thinium (N)
- Dichanthelium sphaerocarpon var. isophyllum (N)
- Dichanthelium sphaerocarpon var. sphaerocarpon (N)
- Dichanthelium spretum (N)
- Dichanthelium villosissimum var. praecocius (N)
- Dichondra carolinensis (N)
- Diervilla lonicera (N)
- Digitalis grandifloraDigitalis grandifloraDigitalis grandiflora is a flowering plant in the family Plantaginaceae. In mountains it grows on warm, bushy slopes or areas left after logging....
(I) - Digitalis lanataDigitalis lanataDigitalis lanata is a species of foxglove that is part of the Plantaginaceae family. It gets its name due to the texture of the leaves. Digitalis lanata, like some other foxglove species, is highly toxic in all parts of the plant...
(I) - Digitalis luteaDigitalis luteaDigitalis lutea, a Yellow Foxglove, is a short-lived perennial plant.The flowers are tubular, yellow, with brown dots on the inside of the corolla. Flowers are borne beginning in late spring, then sporadically throughout the summer and fall....
(I) - Digitalis purpurea ssp. purpureaDigitalis purpureaDigitalis purpurea , is a flowering plant in the family Plantaginaceae , native to most of Europe.-Description:...
(I) - Digitaria ciliaris (N)
- Digitaria cognata (N)
- Digitaria filiformis (N)
- Digitaria ischaemumDigitaria ischaemumDigitaria ischaemum is a species of crabgrass known by the common names smooth crabgrass and small crabgrass. It is native to Europe and Asia, but it is known throughout much of the warm temperate world as an introduced species and often a common roadside and garden weed...
(I) - Digitaria sanguinalisDigitaria sanguinalisDigitaria sanguinalis is a species of grass known by the common name hairy crabgrass or large crabgrass. It is one of the better-known species of crabgrass, and one that is known nearly worldwide as a common weed. It is an annual grass with an inflorescence of up to nine very long, very thin,...
(N) - Diodia teres var. teresDiodia teresDiodia teres is a species of flowering plant in the coffee family known by the common name poorjoe. This annual plant is found throughout the southern half of North America as well as much of the northeastern United States. It has a thin, erect stem rarely approaching half a meter in height...
(N) - Diodia virginiana var. virginiana (N)
- Dioscorea oppositifolia (I)
- Dioscorea quaternata (N)
- Dioscorea villosa (N)
- Diospyros virginianaDiospyros virginianaDiospyros virginiana, commonly called the American persimmon, common persimmon, Eastern persimmon, "'simmon" and "possumwood", is a persimmon species known by a variety of names including. It ranges from New England to Florida, and west to Texas, Louisiana, Oklahoma, and Kansas...
(N) - Diplazium pycnocarponDiplazium pycnocarpon-Description:Diplazium pycnocarpon ' is a tall slender-leaved fern growing as individuals with 5 to 6 leaves. The plant spreads by creeping underground stems allowing a small colony to develop over time. The leaf blade is oblong-lanceolate and once-pinnate, unlike the closely related Athyrium...
(N) - Diplotaxis muralisDiplotaxis muralisDiplotaxis muralis is a species of flowering plant in the mustard family known by the common name annual wall-rocket. This plant is native to Europe, Asia, and Africa, but it is found throughout the temperate world, where it has naturalized. This is an erect mustardlike plant rarely reaching half a...
(I) - Diplotaxis tenuifoliaDiplotaxis tenuifoliaDiplotaxis tenuifolia is a species of flowering plant in the mustard family known by the common name perennial wall-rocket. This plant is native to Europe and Western Asia. It can be found throughout much of the temperate world where it has naturalized.This is an erect mustard-like plant with...
(I) - Dipsacus fullonumDipsacus fullonumDipsacus fullonum, syn. Dipsacus sylvestris, is a species of flowering plant known by the common names Fuller's teasel and wild teasel. It is native to Eurasia and North Africa, but it is known in the Americas, southern Africa, Australia and New Zealand as an introduced species and often a noxious...
(I) - Dipsacus laciniatusDipsacus laciniatusDipsacus laciniatus is a species of flowering plant in the teasel family known by the common name cutleaf teasel. It is native to Europe and Asia. It is present in North America as an introduced species and invasive weed....
(I) - Dipsacus sativus (I)
- Dirca palustrisDirca palustrisDirca palustris, or Eastern Leatherwood, is a shrub that grows to a maximum height of about three meters. It is native to the eastern half of North America but uncommon, found in rich woods, and is occasionally cultivated. The species name, "palustris", means "of the swamps"...
(N) - Distichlis spicata (N)
- Dodecatheon meadia ssp. meadiaDodecatheon meadiaDodecatheon meadia, known as Shooting Star, is a perennial wildflower native to North America. It is found in the American South, as well as the Upper Midwest, Kansas, New York, Pennsylvania and the Canadian province of Manitoba...
(N) - Doellingeria infirma (N)
- Doellingeria umbellata var. umbellata (N)
- Draba brachycarpa (N)
- Draba cuneifolia var. cuneifoliaDraba cuneifoliaDraba cuneifolia is a species of flowering plant in the mustard family known as the wedgeleaf draba or wedgeleaf whitlow-grass. This annual plant is native to the southern half of North America where it grows in open, rocky fields and disturbed areas. The plant forms a basal cluster of leaves,...
(N) - Draba reptans (N)
- Draba vernaDraba vernaSpring draba may also go by the names shadflower, nailwort, vernal whitlow grass, early witlow grass or whitlow-grass. It is a tiny, tiny plant of sagebrush country, in the inland western U.S., most of Europe, including Britain, North Africa and temperate Asia...
(I) - Dracocephalum parviflorum (N)
- Drosera intermediaDrosera intermediaDrosera intermedia, commonly known as the oblong-leaved sundew or spoonleaf sundew, is an insectivorous plant species belonging to the sundew genus. It is a temperate or tropical species native to Europe, southeastern Canada, the eastern half of the United States, Cuba and northern South America.-...
(N) - Drosera rotundifolia var. rotundifoliaDrosera rotundifoliaDrosera rotundifolia is a species of sundew, a carnivorous plant often found in bogs, marshes and fens...
(N) - Dryopteris × benedictii (N)
- Dryopteris × boottii (N)
- Dryopteris carthusianaDryopteris carthusianaDryopteris carthusiana H.P. Fuchs is a species of fern native to damp forests throughout the Holarctic Kingdom...
(N) - Dryopteris clintonianaDryopteris clintonianaDryopteris clintoniana, commonly known as Clinton's wood fern, is a fern of hybrid origin native to the northern hemisphere. It is a fertile hexaploid, arising as a species by doubling of its chromosome number from a hybrid between Dryopteris cristata, a tetraploid, and Dryopteris goldiana, a...
(N) - Dryopteris cristataDryopteris cristataDryopteris cristata A. Gray is a species of fern native to wetlands throughout the Holarctic Kingdom. It is known as the crested wood fern...
(N) - Dryopteris goldianaDryopteris goldianaDryopteris goldiana or Goldie's wood fern is a fern native to the Northeastern United States and adjacent areas of Canada.It can grow larger than any other native North American Dryopteris species. Specimens are known with fronds six feet tall.It is one of the parents of the hybrids Dryopteris...
(N) - Dryopteris intermediaDryopteris intermediaDryopteris intermedia A. Gray, the intermediate wood fern, is an evergreen eastern North American species also occasionally found in Europe. It is a diploid species, and is the parent of several species of hybrid origin, including Dryopteris carthusiana.This fern is often confused with several...
(N) - Dryopteris marginalisDryopteris marginalisDryopteris marginalis is known as the marginal shield fern or marginal wood fern. The marginal wood fern favors damp shady areas and is found throughout eastern North America. It favors moderately acid to circumneutral soils. It favors cooler areas, but is fairly drought-resistant once established...
(N) - Dryopteris × mickelii (N)
- Dryopteris × neowherryi (N)
- Dryopteris × pittsfordensis (N)
- Dryopteris × slossoniae (N)
- Dryopteris × triploidea (N)
- Dryopteris × uliginosa (N)
- Duchesnea indica (I)
- Dulichium arundinaceum var. arundinaceum (N)
- Dyssodia papposa (N)
E
- Echinacea purpureaEchinacea purpureaEchinacea purpurea is a species of flowering plant in the genus Echinacea. Its cone-shaped flowering heads are usually, but not always purple. It is native to eastern North America and present to some extent in the wild in much of the eastern, southeastern and midwest United States...
(N) - Echinochloa crus-galliEchinochloa crus-galliEchinochloa crus-galli is a type of wild grass originating from tropical Asia that was formerly classified as a type of panicum grass. It is commonly known as Cockspur , Common Barnyard Grass, or simply "barnyard grass"...
(I) - Echinochloa frumentaceaEchinochloa frumentaceaEchinochloa frumentacea is a species of Echinochloa. Both Echinochloa frumentacea and Echinochloa esculenta are called "Japanese millet". This millet is widely grown as a cereal in India, Pakistan, and Nepal...
(I) - Echinochloa muricata var. microstachyaEchinochloa muricataEchinochloa muricata is a species of grass known by the common names rough barnyard grass and American barnyard grass. It is native to Eurasia and much of North America. It is an annual grass growing one half to one meter in height....
(N) - Echinochloa muricata var. muricataEchinochloa muricataEchinochloa muricata is a species of grass known by the common names rough barnyard grass and American barnyard grass. It is native to Eurasia and much of North America. It is an annual grass growing one half to one meter in height....
(N) - Echinochloa walteri (N)
- Echinocystis lobata (N)
- Echinodorus berteroiEchinodorus berteroiIn Rataj's taxonomy E. berteroi is in Section Berteroii, Subgenus Echinodorus.Several varieties are named in the literature, but their exact status in such a variable plant seems uncertain.-Distribution:...
(N) - Echium vulgare (I)
- Eclipta prostrata (N)
- Egeria densaEgeria densaEgeria densa is a species of Egeria native to warm temperate South America in southeastern Brazil, Argentina, and Uruguay.It is an aquatic plant growing in water up to 4 m deep, with trailings stems to 2 m or more long, producing roots at...
(I) - Elaeagnus angustifoliaElaeagnus angustifoliaElaeagnus angustifolia, commonly called silver berry, oleaster, Russian olive, or wild olive, is a species of Elaeagnus, native to western and central Asia, from southern Russia and Kazakhstan to Turkey and Iran...
(I) - Elaeagnus multiflora (I)
- Elaeagnus umbellata var. parvifoliaElaeagnus umbellataElaeagnus umbellata, also referred to as Japanese silverberry, umbellate oleaster or autumn-olive, is a species of Elaeagnus native to eastern Asia from the Himalayas east to Japan...
(I) - Elatine brachysperma (N)
- Eleocharis acicularis var. acicularisEleocharis acicularisEleocharis acicularis is a species of spikesedge known by the common names needle spikerush and dwarf hairgrass. It has a circumboreal distribution and it can also be found throughout the rest of the Americas. It is also found in Australia, where it is probably an introduced species...
(N) - Eleocharis compressa var. compressa (N)
- Eleocharis elliptica (N)
- Eleocharis engelmannii (N)
- Eleocharis erythropoda (N)
- Eleocharis geniculataEleocharis geniculataEleocharis geniculata is a species of spikesedge known by several common names, including bent spikerush and Canada spikesedge. This is a widespread plant of wet areas in the Americas, Asia, Africa, and some Pacific Islands. It is an annual spikesedge growing to a maximum height of about 40...
(N) - Eleocharis intermedia (N)
- Eleocharis obtusaEleocharis obtusaEleocharis obtusa is a species of spikesedge known by the common name blunt spikerush. This plant is widely distributed across Canada and the United States, where it grows in wet areas such as riverbanks and moist forest floors. It is also a weed of rice paddies, especially when the rice plants are...
(N) - Eleocharis olivacea var. olivacea (N)
- Eleocharis ovata (N)
- Eleocharis palustris var. palustrisEleocharis palustrisEleocharis palustris Roem. & Schult. is a species of mat-forming perennial plants in the genus Eleocharis growing in wetlands throughout the Boreal Kingdom. E...
(N) - Eleocharis parvulaEleocharis parvulaEleocharis parvula is a species of spikesedge known by the common names dwarf spikerush, small spikerush and hairgrass in aquaria. It has a circumboreal distribution, growing throughout Eurasia and North America, into Central America. It is a plant of brackish and saltwater habitat, such as marshes...
(N) - Eleocharis quadrangulataEleocharis quadrangulataEleocharis quadrangulata is a species of spikesedge known by the common names squarestem spikerush and four-angled spikerush. It is native to much of North America from eastern Canada to southern Mexico, where it grows in and around freshwater in lakes and other water bodies. It is a rhizomatous...
(N) - Eleocharis quinquefloraEleocharis quinquefloraEleocharis quinqueflora is a species of spikesedge known by the common name fewflower spikerush. This plant has a circumboreal distribution and is also found in the southern half of the United States, as well as Chile. It is a resident of wet meadows, bogs, hot springs, and other moist places. This...
(N) - Eleocharis rostellataEleocharis rostellataEleocharis rostellata is a species of spikesedge known by the common name beaked spikerush. It is native to the Americas, where it is widespread from Canada to the West Indies to Chile....
(N) - Eleocharis tenuis var. tenuis (N)
- Eleocharis tenuis var. verrucosa (N)
- Eleocharis wolfii (N)
- ElephantopusElephantopusElephantopus is a genus of at least twelve species of perennials in the daisy family. Several species are native to the southeastern United States, and at least one is native to India and the Himalayas.- Uses :...
carolinianus (N) - Eleusine indicaEleusine indicaEleusine indica is an invasive species in the grass family Poaceae. It is a small annual weed distributed throughout the warmer areas of the world to about 50 degrees latitude...
(I) - Ellisia nyctelea (N)
- Elodea canadensis (N)
- Elodea nuttalliiElodea nuttalliiElodea nuttallii is a species of waterweed known by the common name western waterweed. This is a perennial aquatic plant which is native to North America where it grows submersed in lakes, rivers, and other shallow water bodies. It is also found in Eurasia, where it is commonly weedy; it is not...
(N) - Elymus canadensisElymus canadensisElymus canadensis is a species of wild rye known by the common name Canada wild rye. This grass is native to much of North America, being most abundant in the central plains and Great Plains...
(N) - Elymus hystrix var. bigelovianaElymus hystrixElymus hystrix is a bunchgrass in the grass family, Poaceae.-Description:Elymus hystrix is a herbaceous plant with alternate, simple leaves, on erect stems. The flowers are white, borne in spring....
(N) - Elymus hystrix var. hystrixElymus hystrixElymus hystrix is a bunchgrass in the grass family, Poaceae.-Description:Elymus hystrix is a herbaceous plant with alternate, simple leaves, on erect stems. The flowers are white, borne in spring....
(N) - Elymus repensElymus repensElymus repens Gould is a very common perennial species of grass native to most of Europe, Asia, and northwest Africa...
(I) - Elymus riparius (N)
- Elymus submuticus (N)
- Elymus trachycaulus ssp. subsecundusElymus trachycaulusElymus trachycaulus is a species of wild rye known by the common name slender wheatgrass. It is native to much of North America, where it grows in widely varied habitats from northern Canada to Mexico....
(N) - Elymus trachycaulus ssp. trachycaulusElymus trachycaulusElymus trachycaulus is a species of wild rye known by the common name slender wheatgrass. It is native to much of North America, where it grows in widely varied habitats from northern Canada to Mexico....
(N) - Elymus villosus (N)
- Elymus virginicus var. virginicusElymus virginicusElymus virginicus, or Virginia wildrye, is a perennial bunchgrass located in Virginia and the eastern United States....
(N) - Enemion biternatumEnemion biternatumEnemion biternatum , commonly known as the False Rue-anemone, is a spring ephemeral native to moist deciduous woodland in the eastern United States and extreme southern Ontario....
(N) - Epifagus virginiana (N)
- Epigaea repensEpigaea repensEpigaea repens — known as mayflower or trailing arbutus — is a low, spreading shrub in the Ericaceae family. It is found from Newfoundland to Florida, west to Kentucky and the Northwest Territories.-Biological description:...
(N) - Epilobium ciliatum ssp. ciliatumEpilobium ciliatumEpilobium ciliatum is a species of willowherb known by the common names Fringed Willowherb and American Willowherb. This plant is found in many parts of the world. It is native to much of North America and eastern Asia, and it is an introduced species in much of Eurasia and Australia...
(N) - Epilobium ciliatum ssp. glandulosumEpilobium ciliatumEpilobium ciliatum is a species of willowherb known by the common names Fringed Willowherb and American Willowherb. This plant is found in many parts of the world. It is native to much of North America and eastern Asia, and it is an introduced species in much of Eurasia and Australia...
(N) - Epilobium coloratum (N)
- Epilobium hirsutumEpilobium hirsutumEpilobium hirsutum is a flowering plant belonging to the willowherb genus Epilobium in the family Onagraceae. It is commonly known as the great willowherb, great hairy willowherb or hairy willowherb. Local names include codlins-and-cream, apple-pie and cherry-pie.It is a tall, perennial plant,...
(I) - Epilobium leptophyllumEpilobium leptophyllumEpilobium leptophyllum is a species of flowering plant in the evening primrose family known by the common names Bog Willowherb and Linear-leaved Willowherb. It is native to much of eastern and northern North America, where it grows in moist areas, such as bogs. It is a perennial herb growing up to...
(N) - Epilobium parviflorumEpilobium parviflorumEpilobium parviflorum, commonly known as Smallflower Hairy Willowherb, is a herbaceous perennial plant belonging to the Onagraceae family.-Etymology:...
(I) - Epilobium strictum (N)
- Epilobium × wisconsinense (N)
- Epipactis helleborineEpipactis helleborineEpipactis helleborine is a European orchid that has been introduced to several regions of North America. Its nodding flowers vary from greenish pink to purple, and it prefers shaded woodland environments. More information on this species and others of the genus are at Epipactis.-External links:*...
(I) - Equisetum arvenseEquisetum arvenseEquisetum arvense, commonly known as the Field Horsetail or Common Horsetail, is a rather bushy perennial with a rhizomatous stem formation native to the northern hemisphere. These horsetails may have sterile or fertile stems. Sterile stems start to grow after the fertile stems have wilted...
(N) - Equisetum × ferrissii (N)
- Equisetum fluviatile (N)
- Equisetum hyemale var. affineEquisetum hyemaleEquisetum hyemale , known in South Africa as snake grass, is a species of horsetail native to moist forests, forest edges and stream banks, swamps and fens throughout the Holarctic Kingdom.-Usage:...
(N) - Equisetum laevigatumEquisetum laevigatumEquisetum laevigatum is a species of horsetail known by the common names smooth scouring rush and smooth horsetail. This plant is native to much of North America except for northern Canada and southern Mexico. It is usually found in moist areas in sandy and gravelly substrates. It may be annual or...
(N) - Equisetum × mackaii (N)
- Equisetum × nelsonii (N)
- Equisetum sylvaticum (N)
- Equisetum variegatum var. variegatumEquisetum variegatumEquisetum variegatum is a horsetail native to the Northern Hemisphere.-Description:...
(N) - Eragrostis capillaris (N)
- Eragrostis cilianensisEragrostis cilianensisEragrostis cilianensis is a species of grass known by several common names, including stinkgrass, candy grass, and gray lovegrass.-Distribution:...
(I) - Eragrostis curvula (I)
- Eragrostis frankii (N)
- Eragrostis hirsuta (N)
- Eragrostis hypnoidesEragrostis hypnoidesEragrostis hypnoides is a species of grass known by the common name teal lovegrass. It is native to the Americas from Canada to Argentina...
(N) - Eragrostis minor (I)
- Eragrostis pectinacea var. miserrimaEragrostis pectinaceaEragrostis pectinacea is a species of grass known by the common name Tufted lovegrass. This plant is native to the Americas from Canada to Argentina...
(N) - Eragrostis pectinacea var. pectinaceaEragrostis pectinaceaEragrostis pectinacea is a species of grass known by the common name Tufted lovegrass. This plant is native to the Americas from Canada to Argentina...
(N) - Eragrostis pilosa (N)
- Eragrostis spectabilis (N)
- Eragrostis trichodesEragrostis trichodesEragrostis trichodes, the Sand lovegrass, is a warm season perennial bunchgrass native to North America.-Description:Eragrostis trichodes is most common in sandy soil of the prairies on the central and southern Great Plains....
(N) - Eranthis hyemalisEranthis hyemalisEranthis hyemalis is a plant found in Europe, which belongs to the family Ranunculaceae, the buttercup family. The plant is small, but it has large, yellow, cup-shaped flowers. It is commonly known as Winter Aconite or Wolf's Bane. This plant grows from a tuber and has a low habit...
(I) - Erechtites hieraciifolia var. hieraciifolia (N)
- Erica tetralixErica tetralixErica tetralix is a species of heather found in Atlantic areas of Europe, from southern Portugal to central Norway, as well as a number of boggy regions further from the coast in Central Europe. In bogs, wet heaths and damp coniferous woodland, Erica tetralix can become a dominant part of the flora...
(I) - Erigenia bulbosaErigenia bulbosaErigenia bulbosa, also known as harbinger of spring or pepper and salt, is a perennial plant in the carrot family . E. bulbosa is the only species in the genus Erigenia . This plant is known as harbinger of spring because it is one of the earliest blooming native wildflowers of rich forests in the...
(N) - Erigeron annuusErigeron annuusErigeron annuus is a plant in the daisy family, Asteraceae.-Description:Erigeron annuus is a herbaceous plant with alternate, simple leaves, and green, sparsely haired stems. The flowers are white with yellow centers, borne in spring through fall....
(N) - Erigeron philadelphicus var. philadelphicusErigeron philadelphicusErigeron philadelphicus is a plant in the daisy family, Asteraceae. Also known as Skevish or Philadelphia Daisy.- Description :...
(N) - Erigeron pulchellus var. brauniaeErigeron pulchellusErigeron pulchellus ' is a very pale purplish-blue daisy in the Asteraceae family. Its genus — Erigeron — contains many other species with its name.-External links:* profile at the USDA plants database...
(N) - Erigeron pulchellus var. pulchellusErigeron pulchellusErigeron pulchellus ' is a very pale purplish-blue daisy in the Asteraceae family. Its genus — Erigeron — contains many other species with its name.-External links:* profile at the USDA plants database...
(N) - Erigeron strigosus var. strigosusErigeron strigosusErigeron strigosus is a species of flowering plant in the daisy family known by the common name plains fleabane.It is native to eastern North America, and it is present in western North America as a somewhat weedy naturalized species. This is an annual or biennial daisy reaching heights of anywhere...
(N) - Eriocaulon aquaticum (N)
- Eriochloa contractaEriochloa contractaEriochloa contracta is a species of grass known by the common name prairie cupgrass. It is native to the central United States and it is naturalized in areas to the east and west, where it is often a weed, especially in moist areas. This annual grass may grow up to a meter tall when erect or it may...
(N) - Eriophorum gracile var. gracileEriophorum gracileEriophorum gracile is a species of flowering plant in the sedge family, Cyperaceae. It is known by the common name slender cottonsedge, or slender cottongrass. Eriophorum gracile is a plant with circumboreal distribution, extending south into mountain ranges of the Northern Hemisphere...
(N) - Eriophorum virginicum (N)
- Eriophorum viridicarinatum (N)
- Erodium cicutarium ssp. cicutariumErodium cicutariumErodium cicutarium, also known as Redstem filaree, Common Stork's-bill, is an herbaceous annual, and in warm climates a biennial member of the Geranium Family of flowering plants...
(I) - Erucastrum gallicumErucastrum gallicumErucastrum gallicum is an annual or biennial plant in the mustard family known by the common name common dogmustard. It is a weedy plant with an erect upright habit or sometimes with ascending tops with bright yellow flowers. Plants bloom in late spring, as plants bloom the stems extend upward and...
(I) - Eryngium yuccifolium var. yuccifoliumEryngium yuccifoliumEryngium yuccifolium is a common herbaceous perennial plant, native to the tallgrass prairies of central and eastern North America, from Minnesota east to Ohio and south to Texas and Florida. In the Chicago Region this species has a coefficient of conservatism of 9...
(N) - Erysimum capitatum var. capitatumErysimum capitatumErysimum capitatum is a species of wallflower known commonly as the sanddune wallflower, western wallflower, or prairie rocket. It is a mustard-like plant with thin, erect stems growing from a basal rosette and topped with dense bunches of variably colored flowers...
(N) - Erysimum cheiranthoidesErysimum cheiranthoidesErysimum cheiranthoides is a species of Erysimum native to most of central and northern Europe and northern and central Asia....
(I) - Erysimum inconspicuum var. inconspicuum (N)
- Erysimum repandumErysimum repandumErysimum repandum is a species of wallflower known by several common names, including spreading wallflower, bushy wallflower, and treacle mustard....
(I) - Erythronium albidumErythronium albidumErythronium albidum is a small herbaceous flowering plant in the Liliaceae, native to eastern North America, from southern Quebec and southern Manitoba south to Georgia and Texas....
(N) - Erythronium americanum ssp. americanumErythronium americanumErythronium americanum is a herbaceous flowering plant in the family Liliaceae. The common name "Trout lily" arises from the appearance of its mottled, colored leaves which allegedly resemble the coloring of brook trout. It blooms in early spring with yellow flowers tinged with red...
(N) - Erythronium rostratum (N)
- Eschscholzia californica ssp. californica (N)
- Eubotrys recurva (N)
- Euonymus alatus var. alatusEuonymus alatusEuonymus alatus, known variously as Winged Spindle, Winged Euonymus or Burning Bush, is a deciduous shrub native to eastern Asia, in central and northern China, Japan, and Korea. The shrub grows to 2.5 m tall , often wider than tall...
(I) - Euonymus americanusEuonymus americanusEuonymus americanus is commonly referred to as Strawberry Bush, Bursting Hearts or John Baptiste - Percival. The common names all refer to the plant's seed pods which first appear in mid-summer. It is an evergreen plant, though the number of leaves is greatly diminished during the winter...
(N) - Euonymus atropurpureus var. atropurpureus (N)
- Euonymus europaeus (I)
- Euonymus fortunei var. radicansEuonymus fortuneiEuonymus fortunei, also commonly known as winter creeper or wintercreeper and Fortune's spindle is a species of Euonymus native to east Asia, including China, Korea, Philippines and Japan....
(I) - Euonymus obovatusEuonymus obovatusEuonymus obovatus is a trailing, woodland groundcover plant of the Celastraceae family, which is native to eastern North America in the eastern United States and southeastern Canada.-External links:**...
(N) - Eupatoriadelphus fistulosus (N)
- Eupatoriadelphus maculatus var. maculatus (N)
- Eupatorium album var. albumEupatorium albumEupatorium album, or White thoroughwort, is a herbaceous perennial plant in Asteraceae native from the eastern states of the USA. Like other members of the genus Eupatorium, it flowers with large numbers of small white heads. The flower heads have disc florets but no ray florets...
(N) - Eupatorium altissimumEupatorium altissimumEupatorium altissimum is a perennial plant whose native range includes much of the eastern United States and Canada. It almost always grows on limestone soils, as does Brickellia eupatorioides, which it is potentially confused with...
(N) - Eupatorium godfreyanum (N) (a hybrid of Eupatorium rotundifoliumEupatorium rotundifoliumEupatorium rotundifolium, commonly called Roundleaf thoroughwort, is a herbaceous perennial plant in Asteraceae native to the eastern states of the United States in an area from New Jersey to Oklahoma south to Texas to Florida. The stems grow from 40 to over 100 cm tall and are produced from...
and Eupatorium sessilifoliumEupatorium sessilifoliumEupatorium sessilifolium, commonly called Upland Boneset or Sessile-leaved Boneset, is a herbaceous perennial plant in the family Asteraceae. This species is native to eastern North America, where it blooms in late summer with white flowers....
) - Eupatorium hyssopifolium var. laciniatumEupatorium hyssopifoliumEupatorium hyssopifolium, also known as Hyssopleaf thoroughwort, is a fall-blooming herbaceous plant native to North America. Like other members of the genus Eupatorium it has inflorescences containing a large number of white flowers with disc florets and no ray florets...
(N) - Eupatorium perfoliatum var. perfoliatumEupatorium perfoliatumEupatorium perfoliatum or Boneset is a common perennial plant native to the Eastern United States and Canada, with a range from Nova Scotia to Florida, as well as from Louisiana and Texas through North Dakota. It is also called "agueweed", "feverwort" or "sweating-plant"...
(N) - Eupatorium purpureum var. purpureumEupatorium purpureumEutrochium purpureum , Kidney-root, Sweetscented Joe-Pie weed, Sweet Joe-Pye weed, or Trumpet weed is a herbaceous perennial plant native to eastern and central North America....
(N) - Eupatorium rotundifolium var. ovatumEupatorium rotundifoliumEupatorium rotundifolium, commonly called Roundleaf thoroughwort, is a herbaceous perennial plant in Asteraceae native to the eastern states of the United States in an area from New Jersey to Oklahoma south to Texas to Florida. The stems grow from 40 to over 100 cm tall and are produced from...
(N) - Eupatorium rotundifolium var. rotundifoliumEupatorium rotundifoliumEupatorium rotundifolium, commonly called Roundleaf thoroughwort, is a herbaceous perennial plant in Asteraceae native to the eastern states of the United States in an area from New Jersey to Oklahoma south to Texas to Florida. The stems grow from 40 to over 100 cm tall and are produced from...
(N) - Eupatorium serotinumEupatorium serotinumEupatorium serotinum, also known as late boneset or late thoroughwort, is a fall-blooming herbaceous plant native to North America...
(N) - Eupatorium sessilifolium var. sessilifoliumEupatorium sessilifoliumEupatorium sessilifolium, commonly called Upland Boneset or Sessile-leaved Boneset, is a herbaceous perennial plant in the family Asteraceae. This species is native to eastern North America, where it blooms in late summer with white flowers....
(N) - Euphorbia commutata (N)
- Euphorbia corollataEuphorbia corollataEuphorbia corollata is a species from the Euphorbiaceae family that is native to North America. A common name for the species is flowering spurge.-Range and habitat:...
(N) - Euphorbia cyathophora (N)
- Euphorbia cyparissias (I)
- Euphorbia davidii (I)
- Euphorbia dentataEuphorbia dentataEuphorbia dentata is a species of spurge known by the common names toothed spurge and green poinsettia. It is native to parts of North and South America, and is present elsewhere on the continents. Its true native range is uncertain. It is a noxious weed in some areas...
(I) - Euphorbia dentata var. dentataEuphorbia dentataEuphorbia dentata is a species of spurge known by the common names toothed spurge and green poinsettia. It is native to parts of North and South America, and is present elsewhere on the continents. Its true native range is uncertain. It is a noxious weed in some areas...
(N) - Euphorbia esula var. esula (I)
- Euphorbia falcata (I)
- Euphorbia helioscopia (I)
- Euphorbia lathyrisEuphorbia lathyrisEuphorbia lathyris is a species of spurge native to southern Europe , northwest Africa, and eastward through southwest Asia to western China....
(I) - Euphorbia marginataEuphorbia marginataEuphorbia marginata, snow-on-the-mountain, smoke-on-the-prairie, variegated spurge,whitemargined spurge, is a small shrub in the Euphorbiaceae or spurge family native to parts of temperate North America...
(N) - Euphorbia peplusEuphorbia peplusEuphorbia peplus is a species of Euphorbia, native to most of Europe, northern Africa, and western Asia, where it typically grows in cultivated arable land, gardens, and other disturbed land.Outside of its native range it is very widely naturalised and often invasive, including in Australia, New...
(I) - Euphorbia platyphyllos (I)
- Euphorbia purpurea (N)
- Euphorbia spathulataEuphorbia spathulataEuphorbia spathulata is a species of spurge known by the common names warty spurge and roughpod spurge. It is native to the Americas, where it is widespread. This is an annual herb not exceeding half a meter in height with oval-shaped leaves one to three centimeters long. The upper stem may be...
(N) - Eurybia divaricataEurybia divaricataEurybia divaricata , commonly known as the white wood aster, is an herbaceous plant native to eastern North America. It occurs in the eastern United States, primarily in the Appalachian mountains, though it is also present in southeastern Canada, but only in about 25 populations in the provinces of...
(N) - Eurybia macrophyllaEurybia macrophyllaEurybia macrophylla, commonly known as the Bigleaf Aster, Largeleaf Aster or Largeleaf or Bigleaf Wood Aster, is an herbaceous perennial in the composite family that was formerly treated in the genus Aster...
(N) - Eurybia schreberiEurybia schreberiEurybia schreberi, commonly called Schreber's Aster, is a perennial herb in the composite family. It is native to eastern North America, where it is present in Canada and the United States. The flowers emerge in the late summer or early fall to show white ray florets and yellow disc florets...
(N) - Eurybia surculosaEurybia surculosaEurybia surculosa, commonly known as the Creeping Aster, is an herbaceous perennial in the composite family that was previously treated in the genus Aster. It is native to the eastern United States where it is found primarily in sandy soils along the coastal plain, though when E. compacta is also...
(N) - Euthamia graminifolia var. graminifoliaEuthamia graminifoliaEuthamia graminifolia is a plant in the daisy family, Asteraceae.It is native to much of North America, and also has introduced populations in Europe and Asia.-Description:...
(N) - Euthamia gymnospermoides (N)
F
- Fagopyrum esculentum (I)
- Fagus grandifolia (N)
- Fagus sylvatica (I)
- Fatoua villosa (I)
- Festuca brevipila (I)
- Festuca filiformis (I)
- Festuca rubraFestuca rubraFestuca rubra is a species of grass known by the common name red fescue. It is found worldwide and can tolerate many habitats and climates; it generally needs full sun to thrive...
(I) - Festuca rubra ssp. rubraFestuca rubraFestuca rubra is a species of grass known by the common name red fescue. It is found worldwide and can tolerate many habitats and climates; it generally needs full sun to thrive...
(N) - Festuca subverticillata (N)
- Filago vulgarisFilago vulgarisFilago vulgaris, commonly known as Common Cudweed, is a herbaceous annual plant of the genus Filago.The plant can reach 10 - 30 cm. The flowers are light yellow....
(I) - Filipendula rubraFilipendula rubraFilipendula rubra is a medicinal plant and ornamental plant native to the United States. Its native range extends from the Eastern to the Central United States, and grows in a wide range of shady and moist habitats....
(N) - Filipendula ulmaria ssp. ulmaria (I)
- Fimbristylis autumnalis (N)
- Fleischmannia incarnata (N)
- Floerkea proserpinacoides (N)
- Foeniculum vulgare (I)
- Fontanesia phillyreoides ssp. fortunei (I)
- Forsythia × intermediaForsythia × intermediaForsythia × intermedia is an ornamental deciduous shrub of garden origin.-Description:The shrub has an upright habit with arching branches and grows to 3 to 4 metres high. The opposite leaves turn yellowish or occasionally purplish in the autumn before falling...
(I) - Forsythia suspensaForsythia suspensaForsythia suspensa is a flowering plant native to Asia. It is one of the 50 fundamental herbs used in traditional Chinese medicine. Pinoresinol is a lignan found in F. suspensa.-Characteristics:...
(I) - Fragaria vesca ssp. americana (N)
- Fragaria vesca ssp. vesca (N)
- Fragaria virginiana ssp. grayana (N)
- Fragaria virginiana ssp. virginiana (N)
- Frangula alnus (I)
- Frangula alnus (N)
- Frangula caroliniana (N)
- Frasera caroliniensis (N)
- Fraxinus americana (N)
- Fraxinus excelsior (I)
- Fraxinus nigraFraxinus nigraFraxinus nigra is a species of Fraxinus native to much of eastern Canada and the northeastern United States, from western Newfoundland west to southeastern Manitoba, and south to Illinois and northern Virginia....
(N) - Fraxinus pennsylvanica (N)
- Fraxinus profundaFraxinus profundaFraxinus profunda is a species of Fraxinus native to eastern North America, primarily in the United States, with a scattered distribution on the Atlantic coastal plain and interior lowland river valleys from southern Maryland northwest to Indiana, southeast to northern Florida, and southwest to...
(N) - Fraxinus quadrangulata (N)
- Froelichia floridana var. campestris (N)
- Froelichia gracilis (N)
- Fumaria officinalis ssp. officinalisFumaria officinalisFumaria officinalis is the most common species of the genus Fumaria in Western and Central Europe. It is closely related to the Papaveraceae Family.-Description:...
(I)
G
- Gaillardia pulchella var. pulchellaGaillardia pulchellaGaillardia pulchella , is a short-lived perennial or annual flowering plant native to the central United States.-Growth:...
(N) - Galactia volubilis (N)
- Galanthus elwesii (I)
- Galanthus nivalisGalanthus nivalisOften referred to as the common snowdrop, Galanthus nivalis is the best-known and most widespread representative of a small genus of about 20 species...
(I) - Galax urceolata (N)
- Galearis spectabilisGalearis spectabilisGalearis spectabilis is a orchid species of the Orchis genus...
(N) - Galeopsis bifidaGaleopsis bifidaGaleopsis bifida is a plant species in the genus Galeopsis . It is an annual plant native to Europe and Asia but now found in Canada and northeastern, Midwestern part of United States. It has other alternative names such as Bifid hempnettle,split-lip hempnettle and common hempnettle...
(I) - Galeopsis ladanum var. ladanum (I)
- Galeopsis tetrahit var. tetrahitGaleopsis tetrahitGaleopsis tetrahit is a flowering plant in the family Lamiaceae, native to Europe and northwestern Asia.It is a herbaceous annual plant growing to 1 m tall; it is a pioneer species and thrives on disturbed sites or roadsides. The plant looks like mint but is taller. The stems have reflexed hairs...
(I) - Galinsoga parvifloraGalinsoga parvifloraGalinsoga parviflora is a herbaceous plant in the Asteraceae family. It has several common names including Guasca , Mielcilla , Galinsoga , gallant soldier ....
(I) - Galinsoga quadriradiataGalinsoga quadriradiataGalinsoga quadriradiata is a species of flowering plant in the daisy family which is known by several common names, including shaggy soldier, hairy galinsoga, and fringed quickweed. It is found throughout most of the temperate world, but apparently its native home is Mexico. In Portuguese-speaking...
(I) - Galium aparineGalium aparineGalium aparine is a herbaceous annual plant of the family Rubiaceae. It is native to North America and Eurasia. It has several common names, including Cleavers, Clivers, Goosegrass, Stickywilly, Stickyjack, Stickyweed, Stickyleaf, Catchweed, Robin-run-the-hedge and Coachweed.-Growth:The long stems...
(N) - Galium asprellum (N)
- Galium borealeGalium borealeGalium boreale or Northern Bedstraw is a plant species of the genus Galium.Gallium boreale is edible, with a sweet smell and taste, and can be eaten as a wild salad green...
(N) - Galium circaezans var. hypomalacum (N)
- Galium concinnum (N)
- Galium labradoricum (N)
- Galium lanceolatum (N)
- Galium mollugo (I)
- Galium obtusum ssp. obtusum (N)
- Galium odoratum (I)
- Galium palustreGalium palustreGalium palustre is a herbaceous annual plant of the family Rubiaceae. This plant is native to Europe and North America and has several common names, including Common Marsh-bedstraw....
(N) - Galium pilosum var. pilosum (N)
- Galium tinctorium (N)
- Galium trifidum ssp. trifidumGalium trifidumGalium trifidum is a species of flowering plant in the coffee family known by the common name threepetal bedstraw. It is native to most of northern and western North America from Alaska eastern Canada to Mexico, where it grows in moist habitat...
(N) - Galium triflorumGalium triflorumGalium triflorum is a herbaceous plant of the family Rubiaceae. It grows throughout the Northern Hemisphere. It exists in creeps along the forest floor, with whorled leaves and single fruiting peduncles rising above basal rosettes. There are six leaflets in a whorl below the peduncle...
(N) - Galium verum var. verumGalium verumGalium verum is a herbaceous perennial plant of the family Rubiaceae, native to Europe and Asia. It is a low scrambling plant, with the stems growing to long, frequently rooting where they touch the ground. The leaves are long and broad, shiny dark green, hairy underneath, borne in whorls of 8–12...
(I) - Gamochaeta purpurea (N)
- Gaultheria hispidulaGaultheria hispidulaGaultheria hispidula, commonly known as the Creeping Snowberry or Moxie-Plum, is a spreading ground-level vine of the heath family Ericaceae native to North America that produces small white edible berries. It fruits from August to September...
(N) - Gaultheria procumbens (N)
- Gaura biennis (N)
- Gaura longiflora (N)
- Gaura mollis (N)
- Gaylussacia baccataGaylussacia baccataGaylussacia baccata, the Black Huckleberry, is a common huckleberry found throughout a wide area of northeastern North America. It closely resembles the blueberry plants with which it grows, but can be readily identified by the numerous resin dots on the undersides of the leaves which glitter when...
(N) - Genista tinctoriaGenista tinctoriaGenista tinctoria, with common names: Dyer's Broom, Dyer’s Greenweed, Dyer's Whin, Furze, Greenbroom, Greenweed, Waxen Woad, Woad Waxen and Waxen Wood, is a plant species of the genus Genista.-Description:...
(I) - Gentiana albaGentiana albaGentiana alba is a herbaceous species of flowering plant in the Gentian family Gentianaceae, producing yellowish-white colored flowers from thick white taproots...
(N) - Gentiana andrewsii var. andrewsiiGentiana andrewsiiGentiana andrewsii is a herbaceous species of flowering plant in the Gentian family Gentianaceae....
(N) - Gentiana × billingtonii (N)
- Gentiana clausaGentiana clausaGentiana clausa is a 1'-2' tall flowering plant in the Gentianaceae family. It is native to Eastern North American moist meadows and woods at higher elevations, from Quebec in the north, through the Appalachian range to North Carolina and Tennessee in the south...
(N) - Gentiana puberulenta (N)
- Gentiana saponaria var. saponariaGentiana saponariaGentiana saponaria is a tall flowering plant in the Gentianaceae family. It is native to eastern North America south of the Great Lakes, from Wisconsin to New York, and south to Texas and Florida...
(N) - Gentiana villosaGentiana villosaGentiana villosa, the Striped Gentian or Sampson's Snakeroot, is a herbaceous perennial plant belonging to the genus Gentiana. It is found mainly in the Eastern United States and is used medicinally by Native American tribes....
(N) - Gentianella quinquefolia ssp. occidentalisGentianella quinquefoliaGentianella quinquefolia is a medicinal plant.-Subspecies:There are two subspecies:*Gentianella quinquefolia Small ssp. occidentalis J.Gillett...
(N) - Gentianopsis crinita (N)
- Gentianopsis virgata ssp. victorinii (N)
- Gentianopsis virgata ssp. virgata (N)
- Geranium bicknelliiGeranium bicknelliiGeranium bicknellii is a species of geranium known by the common names Bicknell's Cranesbill and Northern Cranesbill. It is native to much of the northern half of North America, where it can be found in a number of forest and woodland habitats. This is an annual or biennial herb which grows hairy...
(N) - Geranium carolinianum var. carolinianumGeranium carolinianumGeranium carolinianum is a species of geranium known by the common name Carolina cranesbill, or Carolina geranium. It is native to North America, where it is widespread and grows in many types of habitat. This is an annual herb reaching just over half a meter in maximum height. It has erect stems...
(N) - Geranium columbinumGeranium columbinumGeranium columbinum, common name Long-stalked Crane's-bill or Longstalk Cranesbill, is a herbaceous annual plant in the Geraniaceae family.-Description:...
(I) - Geranium dissectumGeranium dissectumGeranium dissectum or Cut-leaved Cranesbill is a plant species of the genus Geranium. It is native to Europe.It can be found on other continents as an introduced species. It is a widespread noxious weed and invasive species in North America, where it is known as the Cutleaf Geranium.-External...
(I) - Geranium maculatumGeranium maculatumGeranium maculatum, the Spotted Geranium, Wood Geranium, or Wild Geranium is a woodland perennial plant native to eastern North America, from southern Manitoba and southwestern Quebec south to Alabama and west to Oklahoma and South Dakota...
(N) - Geranium molleGeranium molleGeranium molle, the Dovesfoot Cranesbill, is an annual herbaceous plant belonging to the Geraniaceae family.-Description:Geranium molle is a small plant reaching on average in height. It is a very branched plant, quite hairy, with several ascending stems. The leaves are palmate, cut 5 to 9 times...
(I) - Geranium pusillumGeranium pusillumGeranium pusillum, commonly known as Small-flowered Cranesbill or Small Geranium, is a herbaceous annual plant of the genus Geranium.-External links:***...
(I) - Geranium robertianum (I)
- Geranium robertianum ssp. robertianum (N)
- Geranium sanguineumGeranium sanguineumGeranium sanguineum, commonly called Bloody Cranesbill or Bloody Geranium, is a perennial herbaceous plant species in the Geraniaceae family...
(I) - Geum aleppicumGeum aleppicumGeum aleppicum, Yellow Avens, is a flowering plant native to most of the temperate Northern Hemisphere, from eastern Europe across Asia and North America....
(N) - Geum canadense var. canadenseGeum canadenseGeum canadense is a plant in the rose family, Rosaceae.-Description:Geum canadense is a herbaceous plant with alternate, simple leaves, on green stems. The flowers are white, borne in spring....
(N) - Geum laciniatum var. laciniatumGeum laciniatumGeum laciniatum is a member of the Rosaceae family. It is a perennial forb, native to eastern North America. -External links:*...
(N) - Geum rivale (N)
- Geum urbanum (I)
- Geum vernum (N)
- Geum virginianum (N)
- Gilia capitata ssp. capitataGilia capitataGilia capitata is a species of flowering plant in the phlox family known by the common names bluehead gilia, blue field gilia, and globe gilia. It is native to much of western North America from Alaska to northern Mexico, and it can be found on the eastern side of the continent as an introduced...
(N) - Gillenia stipulataGillenia stipulataGillenia stipulata is a plant in the genus Gillenia, in the Rosaceae....
(N) - Gillenia trifoliataGillenia trifoliataGillenia trifoliata is an ornamental plant in the Rosaceae family.-External links:**...
(N) - Gladiolus × gandavensis (I)
- Glandularia canadensis (N)
- Glandularia × hybrida (I)
- Glebionis segetumGlebionis segetumGlebionis segetum is a species of the genus Glebionis, probably native only to the eastern Mediterranean region. Common names include Corn Marigold and Corn Daisy....
(I) - Glechoma hederaceaGlechoma hederaceaGlechoma hederacea is an aromatic, perennial, evergreen creeper of the mint family Lamiaceae. It is commonly known as Ground-ivy, gill-over-the-ground or Creeping Charlie. It has numerous medicinal uses, and is commonly used as a tasty salad green in many countries...
(I) - Gleditsia triacanthos (N)
- Glyceria acutiflora (N)
- Glyceria borealisGlyceria borealisGlyceria borealis is a species of mannagrass known by the common names northern mannagrass, boreal mannagrass, and small floating mannagrass. It is native to much of the northern half of North America, where it has a widespread distribution...
(N) - Glyceria canadensis (N)
- Glyceria grandis var. grandisGlyceria grandisGlyceria grandis is a species of mannagrass known by the common name American mannagrass. It is native to Canada and the United States, where it is widespread in distribution. It is most commonly found in wet areas such as riverbanks and ponds. This is a rhizomatous perennial grass bearing thin...
(N) - Glyceria melicaria (N)
- Glyceria septentrionalis (N)
- Glyceria striataGlyceria striataGlyceria striata is a species of mannagrass known by the common names fowl mannagrass and ridged glyceria. It is native to much of North America, from Alaska and northern Canada to northern Mexico....
(N) - Glycine max (I)
- Gnaphalium uliginosumGnaphalium uliginosumGnaphalium uliginosum or Marsh Cudweed is an annual plant found on damp, disturbed ground and tracks. It can be found in the British Isles and Europe. It is very common on damp, arable grasslands, paths, and on acid soils.-Description:...
(I) - Gomphrena globosaGomphrena globosaGomphrena globosa, commonly known as Globe Amaranth or Bachelor Button, is an annual plant that grows up to 24 inches in height...
(I) - Goodyera pubescensGoodyera pubescensGoodyera pubescens, the Rattlesnake Plantain, is one of the most common orchids native to eastern North America. It is an evergreen terrestrial species with variegated leaves. The variegation is in the form of a densely-reticulated network of veins that are a much lighter green than the rest of the...
(N) - Goodyera repensGoodyera repensGoodyera repens, an orchid in the genus Goodyera, is called by the common name creeping lady's tresses in Anglophone Europe and dwarf rattlesnake plantain or lesser rattlesnake plantain in North America....
(N) - Goodyera tesselataGoodyera tesselataGoodyera tesselata is a plant in the orchid family , called by the common name Checkered Rattlesnake Plantain. It has low basal leaves with white reticulated lines.The inflorescence is an upright stalk with small white flowers....
(N) - Gratiola neglectaGratiola neglectaGratiola neglecta is a species of flowering plant known by the common name clammy hedgehyssop. It is native to much of North America, including most all of the United States and the southern half of Canada. It is generally found in moist to wet habitat. This is an unobtrusive annual herb producing...
(N) - Gratiola virginiana var. virginiana (N)
- Gratiola viscidula (N)
- Grindelia lanceolata var. lanceolata (N)
- Grindelia squarrosa var. serrulataGrindelia squarrosaGrindelia squarrosa is a small North American biennial or short-lived perennial plant which grows to a height of 90 cm and bears yellow flowers from June to September. It was discovered by Lewis and Clark and before that it had been used by Great Plains Tribes as a medicinal herb.-External...
(N) - Grindelia squarrosa var. squarrosaGrindelia squarrosaGrindelia squarrosa is a small North American biennial or short-lived perennial plant which grows to a height of 90 cm and bears yellow flowers from June to September. It was discovered by Lewis and Clark and before that it had been used by Great Plains Tribes as a medicinal herb.-External...
(N) - Guizotia abyssinicaGuizotia abyssinicaGuizotia abyssinica is an erect, stout, branched annual herb, grown for its edible oil and seed. Its cultivation originated in the Ethiopian highlands, and has spread to other parts of Ethiopia...
(I) - Gutierrezia texana var. texana (N)
- Gymnocarpium appalachianum (N)
- Gymnocarpium × brittonianum (N)
- Gymnocarpium dryopteris (N)
- Gymnocladus dioicus (N)
- Gymnopogon ambiguus (N)
- Gypsophila muralis (I)
- Gypsophila paniculataGypsophila paniculataGypsophila paniculata, commonly known as Baby's-breath, is a cultivated ornamental garden plant in the Caryophyllaceae family, popular in the florist trade to provide a background for more colourful flowers....
(I) - Gypsophila scorzonerifolia (I)
H
- Hackelia deflexa var. americana (N)
- Hackelia virginianaHackelia virginianaHackelia virginiana, commonly known as Beggar's Lice or Stickseed, is a biennial plant native to Eastern North America. It has simple, rough leaves and ribbed green stems....
(N) - Halesia tetraptera var. tetrapteraHalesia tetrapteraHalesia tetraptera is a species in the family Styracaceae, native to the southeastern United States....
(N) - Hamamelis virginianaHamamelis virginianaHamamelis virginiana is a species of Witch-hazel native to eastern North America, from Nova Scotia west to Minnesota, and south to central Florida to eastern Texas....
(N) - Hasteola suaveolens (N)
- Hedeoma hispida (N)
- Hedeoma pulegioidesHedeoma pulegioidesHedeoma pulegioides is a species of Hedeoma native to eastern North America, from Nova Scotia and southern Ontario west to Minnesota and South Dakota, and south to northern Georgia and Arkansas.It is a low-growing, strongly aromatic herbaceous annual plant from 15–30 cm tall, with a slender erect...
(N) - Hedera helixHedera helixHedera helix is a species of ivy native to most of Europe and western Asia. It is labeled as an invasive species in a number of areas where it has been introduced.-Description:...
(I) - Helenium amarum var. amarumHelenium amarumHelenium amarum is a species of annual herb in the daisy family known by the common names yellowdicks, yellow sneezeweed, and bitter sneezeweed. It is native to much of the southeastern United States and northern Mexico, and it is present elsewhere in North America as an introduced species...
(N) - Helenium autumnale var. autumnaleHelenium autumnaleHelenium autumnale is a flowering plant native to North America. Common names include common sneezeweed and large-flowered sneezeweed.-Natural habitat and distribution:...
(N) - Helenium flexuosumHelenium flexuosumHelenium flexuosum is a species of annual herb in the daisy family known by the common name purple sneezeweed. It is native to the eastern half of North America.-External links:*...
(N) - Helianthemum bicknellii (N)
- Helianthemum canadense (N)
- Helianthus × ambiguus (N)
- Helianthus angustifolius (N)
- Helianthus annuus (N)
- Helianthus × brevifolius (N)
- Helianthus × cinereus (N)
- Helianthus decapetalus (N)
- Helianthus divaricatusHelianthus divaricatusHelianthus divaricatus, commonly known as the woodland sunflower, is a perennial herb in the composite family. It is native to eastern North America, from Ontario and Quebec in the north, south to Florida and west to Oklahoma and Iowa. It commonly occurs in dry, relatively open sites...
(N) - Helianthus × divariserratus (N)
- Helianthus × doronicoides (N)
- Helianthus giganteusHelianthus giganteusHelianthus giganteus , is a species of Helianthus native to the eastern United States and southeastern Canada, from Nova Scotia and Ontario west to Minnesota and south to Mississippi and Georgia....
(N) - Helianthus × glaucus (N)
- Helianthus grosseserratusHelianthus grosseserratusHelianthus grosseserratus, commonly known as sawtooth sunflower or thick-tooth sunflower, is a perennial sunflower in the family Asteraceae, with a large flowering head ....
(N) - Helianthus hirsutus (N)
- Helianthus × intermedius (N)
- Helianthus × kellermanii (N)
- Helianthus × laetiflorusHelianthus × laetiflorusHelianthus × laetiflorus is a plant in the daisy family, Asteraceae.-Description:Helianthus × laetiflorus is a herbaceous plant with alternate, simple leaves, on green stems. The flowers are yellow, borne in late summer....
(N) - Helianthus × luxurians (N)
- Helianthus maximilianiHelianthus maximilianiHelianthus maximiliani is a species of sunflower known by the common name Maximilian sunflower.Native to much of the eastern half of North America, it is found in parts of the western half as an introduced species. The plant thrives in a number of ecosystems, particularly across the plains in...
(N) - Helianthus microcephalusHelianthus microcephalusHelianthus microcephalus is a perennial species of Helianthus also known as small woodland sunflower or small-wood sunflower or small-head sunflower...
(N) - Helianthus mollis (N)
- Helianthus × multiflorus (N)
- Helianthus occidentalis ssp. occidentalisHelianthus occidentalisHelianthus occidentalis is a species of sunflower found in the eastern United States. It differs from other, similar species by its sparse leaves, most of which are basal. This perennial flower reaches heights from two to five feet.-References:*Schilling, E. E. Helianthus in: Flora of North...
(N) - Helianthus petiolaris ssp. petiolaris (N)
- Helianthus salicifolius (N)
- Helianthus strumosus (N)
- Helianthus tuberosus (N)
- Heliopsis helianthoides var. helianthoides (N)
- Heliopsis helianthoides var. occidentalis (N)
- Heliotropium europaeumHeliotropium europaeumHeliotropium europaeum is a species of heliotrope known by the common names European Heliotrope and European Turnsole. It is native to Europe, Asia, and North Africa, but it is widely naturalized elsewhere, such as in Australia and North America. It grows as a roadside weed in some places...
(I) - Heliotropium indicumHeliotropium indicumHeliotropium indicum, commonly known as Indian heliotrope, is an annual, hirsute plant that is a common weed in waste places and settled areas. It is native to Asia.-Description:...
(I) - Helleborus viridis (I)
- Hemerocallis fulvaHemerocallis fulvaHemerocallis fulva is a species of Hemerocallis, native to Asia from the Caucasus east through the Himalaya to China, Japan, Korea, and southeastern Russia.-Growth:...
(I) - Hemerocallis lilioasphodelusHemerocallis lilioasphodelusHemerocallis lilioasphodelus, is a plant of the genus Hemerocallis. It is found across China, in Europe in N.E...
(I) - Hepatica nobilis var. acuta (N)
- Hepatica nobilis var. obtusa (N)
- Heracleum maximum (N)
- Hesperis matronalis (I)
- Hesperostipa spartea (N)
- Heteranthera dubiaHeteranthera dubiaHeteranthera dubia is a species of aquatic plant known by the common names water stargrass and grassleaf mudplantain. It is native to North and Central America where it is widespread from Canada to Guatemala. It lives submersed in freshwater such as rivers and lakes. It is quite variable in...
(N) - Heteranthera reniformis (N)
- Heterotheca camporum var. camporum (N)
- Heuchera americana var. americanaHeuchera americanaHeuchera americana, or Alumroot, is a small evergreen perennial native to Central U.S. Lobed semi-palmate green, purple, or brown leaves are often veined or marbled...
(N) - Heuchera americana var. hirsuticaulisHeuchera americanaHeuchera americana, or Alumroot, is a small evergreen perennial native to Central U.S. Lobed semi-palmate green, purple, or brown leaves are often veined or marbled...
(N) - Heuchera americana var. hispidaHeuchera americanaHeuchera americana, or Alumroot, is a small evergreen perennial native to Central U.S. Lobed semi-palmate green, purple, or brown leaves are often veined or marbled...
(N) - Heuchera longiflora (N)
- Heuchera parviflora var. parviflora (N)
- Heuchera villosa var. villosaHeuchera villosaHeuchera villosa, the Hairy Alumroot, is a small evergreen perennial native to Appalachia. and the Northeastern, Southeastern, and parts of Central United States.....
(N) - Hexalectris spicata var. spicata (N)
- Hibiscus laevis (N)
- Hibiscus moscheutosHibiscus moscheutosHibiscus moscheutos is a cold-hardy perennial wetland plant that can grow in large colonies. The hirsute leaves are of variable morphology, but commonly found as deltoidal in form and sometimes having up to three lobes...
(N) - Hibiscus syriacusHibiscus syriacusHibiscus syriacus is a widely cultivated ornamental shrub in the genus Hibiscus. Common names include Rose of Sharon , Shrub Althea and Rose Althea.-Growth:...
(I) - Hibiscus trionum (I)
- Hieracium aurantiacum (I)
- Hieracium caespitosumHieracium caespitosumHieracium caespitosum...
(I) - Hieracium × flagellare var. flagellare (I)
- Hieracium × floribundum (I)
- Hieracium greenii (N)
- Hieracium gronovii (N)
- Hieracium kalmii var. fasciculatum (N)
- Hieracium kalmii var. kalmii (N)
- Hieracium longipilum (N)
- Hieracium paniculatum (N)
- Hieracium pilosella var. pilosella (I)
- Hieracium piloselloidesHieracium piloselloidesHieracium piloselloides is a species of flowering plant in the aster family known by the common name tall hawkweed. It is native to Europe and it is present in North America as an introduced species and a common weed....
(I) - Hieracium scabrum var. scabrum (N)
- Hieracium venosumHieracium venosumHieracium venosum is a species of Hieracium. It shares its name with the Blue Hill Daisy , as well as other Erigeron species alike....
(N) - Hierochloe hirta ssp. arctica (N)
- Holcus lanatus (I)
- Holosteum umbellatumHolosteum umbellatumHolosteum umbellatum is a species of flowering plant in the Caryophyllaceae family. It is native to Europe but has also been introduced to North America.-External links:*...
(I) - Hordeum brachyantherum ssp. brachyantherumHordeum brachyantherumHordeum brachyantherum, known by the common name Meadow barley, is a species of barley. It is native to western North America from Alaska to northern Mexico, coastal areas of eastern-most Russia , and a small area of coastal Newfoundland....
(N) - Hordeum jubatum ssp. jubatumHordeum jubatumHordeum jubatum is a perennials plant species in the grass family Poaceae. It occurs wild mainly in northern North America and adjacent northeastern Siberia. However, as it escaped often from gardens it can be found worldwide in areas with temperate to warm climates, and is considered a weed in...
(N) - Hordeum marinum ssp. gussonianumHordeum marinumHordeum marinum, commonly known as sea barley, is a species of grass....
(I) - Hordeum pusillumHordeum pusillumHordeum pusillum or little barley is a diploid-type species of the Poaceae family of grasses. H. pusillum, native to the United States except the westernmost parts, originated via multiple long-distance dispersals of a southern South American species of Hordeum to North America about 1 million...
(N) - Hordeum vulgare (I)
- Hosta lancifolia (I)
- Hosta ventricosa (I)
- Hottonia inflata (N)
- Houstonia caeruleaHoustonia caeruleaHoustonia caerulea is a perennial ornamental plant in the Rubiaceae family.-Description:...
(N) - Houstonia canadensis (N)
- Houstonia longifoliaHoustonia longifoliaHoustonia longifolia is a perennial plant in the family Rubiaceae. It can be found throughout most of the Eastern United States and Canada....
(N) - Houstonia purpurea var. calycosaHoustonia purpureaHoustonia purpurea is a species of flowering plant in the coffee family known by the common names Venus' pride, woodland bluet, and purple bluet. It is native to the eastern United States....
(N) - Houstonia purpurea var. purpureaHoustonia purpureaHoustonia purpurea is a species of flowering plant in the coffee family known by the common names Venus' pride, woodland bluet, and purple bluet. It is native to the eastern United States....
(N) - Hudsonia tomentosa var. tomentosa (N)
- Humulus japonicusHumulus japonicusHumulus japonicus is an ornamental plant in the Cannabaceae family.This species is a host plant for Polygonia c-aureum.-External links:***...
(I) - Humulus lupulus var. lupuloidesHumulus lupulusHumulus lupulus is a species of Humulus in the Cannabaceae family.Common hop is a dioecious, perennial herbaceous climbing plant which sends up new shoots in early spring and dies back to the cold-hardy rhizome in autumn...
(N) - Humulus lupulus var. pubescensHumulus lupulusHumulus lupulus is a species of Humulus in the Cannabaceae family.Common hop is a dioecious, perennial herbaceous climbing plant which sends up new shoots in early spring and dies back to the cold-hardy rhizome in autumn...
(N) - Humulus lupulus var. lupulusHumulus lupulusHumulus lupulus is a species of Humulus in the Cannabaceae family.Common hop is a dioecious, perennial herbaceous climbing plant which sends up new shoots in early spring and dies back to the cold-hardy rhizome in autumn...
(I) - Huperzia × bartleyi (N)
- Huperzia × buttersii (N)
- Huperzia lucidula (N)
- Huperzia porophila (N)
- Hyacinthoides non-scripta (I)
- Hybanthus concolorHybanthus concolorHybanthus concolor is a member of the Violaceae family, and it is more commonly known as "green violet". It is found in moist, shady sites in ravines and on rocky slopes, also on floodplains, in rich, calcareous soils. Most of the Canadian populations are located along the Niagara Escarpment, a...
(N) - Hydrangea arborescensHydrangea arborescensHydrangea arborescens, commonly known as Smooth Hydrangea, Wild Hydrangea, or Sevenbark, is a small to medium sized, deciduous shrub up to 3 m tall that is native to the eastern United States.-Range/Habitat:...
(N) - Hydrastis canadensis (N)
- Hydrocotyle americana (N)
- Hydrocotyle ranunculoidesHydrocotyle ranunculoidesHydrocotyle ranunculoides, known commonly as water pennywort or floating pennywort is an aquatic plant in the Apiaceae. It is native to North and South America and parts of Africa. In the UK it is an invasive alien species which is currently spreading in waterways in the UK. It is also a weed in...
(N) - Hydrocotyle sibthorpioides (I)
- Hydrocotyle umbellataHydrocotyle umbellataHydrocotyle umbellata, is an aquatic plant that thrives in wet, sandy habitat. Its English common name is manyflower marsh pennywort or dollarweed. It is native to North America and parts of South America. It can also be found growing as an introduced species and sometimes a noxious weed on other...
(N) - Hydrophyllum appendiculatum (N)
- Hydrophyllum canadense (N)
- Hydrophyllum macrophyllum (N)
- Hydrophyllum virginianum var. virginianumHydrophyllum virginianumThe Virginia Waterleaf is an herbaceous perennial plant native to Eastern North America. The plant generally spreads by rhizomes to form large colonies in wooded areas. It can also spread by seeds. The seedling usually appear early to mid-spring. Flowers are blue, white, or purple, appearing in...
(N) - Hylotelephium telephioidesHylotelephium telephioidesHylotelephium telephioides is a plant in the stonecrop family, Crassulaceae. Its common names include Allegheny stonecrop and live-forever....
(N) - Hylotelephium telephium ssp. telephiumHylotelephium telephiumHylotelephium telephium is succulent perennial groundcover of the family Crassulaceae native to Eurasia. The flowers are held in dense heads and can be reddish or yellowish-white...
(I) - Hypericum ascyron (N)
- Hypericum boreale (N)
- Hypericum canadense (N)
- Hypericum drummondii (N)
- Hypericum ellipticum (N)
- Hypericum gentianoides (N)
- Hypericum gymnanthum (N)
- Hypericum hypericoides ssp. multicaule (N)
- Hypericum kalmianum (N)
- Hypericum majus (N)
- Hypericum mutilumHypericum mutilumHypericum mutilum is a species of St. John's wort known by the common name dwarf St. John's wort. It is native to parts of North America, and is present in other parts as an introduced species. It is an annual or perennial herb taking a multibranched erect form up to about 60 centimeters tall. The...
(N) - Hypericum perforatum (I)
- Hypericum prolificum (N)
- Hypericum punctatum (N)
- Hypericum sphaerocarpum (N)
- Hypericum virgatum (N)
- Hypochaeris glabraHypochaeris glabraHypochaeris glabra is a species of flowering plant in the daisy family known by the common name smooth cat's ear. It is native to Eurasia and North Africa but it can be found on other continents where it is an introduced species and a widespread weed. This is an annual herb growing a small taproot,...
(I) - Hypochaeris radicata (I)
- Hypoxis hirsutaHypoxis hirsutaHypoxis hirsuta is an ornamental plant native to the United States and Canada in the Hypoxidaceae family. Sometimes this plant is placed in the Amaryllidaceae family or the Liliaceae family.-External links:****...
(N)
I
- Iberis umbellataIberis umbellataIberis umbellata, common name Candytuft or Globe Candytuft, is a herbaceous annual flowering plant of the genus Iberis and the family Brassicaceae.-Etymology:...
(I) - Ilex crenata (I)
- Ilex mucronata (N)
- Ilex opaca var. opaca (N)
- Ilex verticillata (N)
- Impatiens balsaminaImpatiens balsaminaImpatiens balsamina is a species of Impatiens native to southern Asia in India and Myanmar.It is called kamantigue in the Philippines. This species of Kalamantigue are used in teas...
(I) - Impatiens capensisImpatiens capensisImpatiens capensis, the Orange Jewelweed, Common Jewelweed, Spotted Jewelweed, Spotted Touch-me-not, or Orange Balsam, is an annual plant native to North America. It is common in bottomland soils, ditches, and along creeks, often growing side-by-side with its less common relative, Yellow Jewelweed...
(N) - Impatiens pallidaImpatiens pallidaPale Jewelweed or Yellow Jewelweed is a flowering plant native to the United States. It grows in moist to wet soils, generally alongside the closely related Impatiens capensis, producing flowers from midsummer through fall...
(N) - Inula helenium (I)
- Iodanthus pinnatifidus (N)
- Ionactis linariifolius (N)
- Ipomoea coccineaIpomoea coccineaIpomea coccinea is a flowering plant in the family Convolvulaceae known by several common names including Red Morning Glory, Redstar and Mexican Morning Glory.It was first described by Linnaeus in 1753.- References :...
(I) - Ipomoea hederaceaIpomoea hederaceaIpomoea hederacea is a flowering plant in the bindweed family. The species is native to tropical parts of the Americas, and has more recently been introduced to North America. It now occurs there from Arizona to Florida and north to Ontario and North Dakota. Like most members of the family, it is...
(I) - Ipomoea lacunosaIpomoea lacunosaThe whitestar potato, Ipomoea lacunosa, is a species that belongs to the Ipomoea genus. In this genus most members are commonly referred to as "morning glories". The name for the genus, Ipomoea, has root in the Greek words ips and homoios, which translates to worm-like. This is a reference to the...
(N) - Ipomoea pandurataIpomoea pandurataIpomoea pandurata the Wild Potato Vine, Big-rooted Morning Glory or Man-of-the-Earth is a species of herbaceous perennial vine. Another common name is "manroot", but that typically refers to the quite unrelated gourd genus Marah.It is rarely cultivated but grows wild in North America appearing...
(N) - Ipomoea purpureaIpomoea purpureaIpomoea purpurea, the Purple, Tall, or Common Morning Glory, is a species in the genus Ipomoea, native to Mexico and Central America. Like all morning glories the plant entwines itself around structures, growing to a height of 2–3 m tall. The leaves are heart-shaped and the stems are covered with...
(I) - Ipomopsis rubra (N)
- Iris brevicaulis (N)
- Iris cristataIris cristataIris cristata is a beardless rhizomatous iris native to the eastern United States, south of where the Wisconsinan glaciation spread about 11,000 years ago....
(N) - Iris fulva (N)
- Iris germanicaIris germanicaIris germanica, the German Iris, is a species in the genus irisThe Iris Germanica grows up to 90 cm high and 10 cm wide. The roots can go up to 10 cm deep. It is an outdoors plant that blooms most in May-August, but planting it would be best in February-April..It is a European hybrid, rather than a...
(I) - Iris pseudacorusIris pseudacorusIris pseudacorus is a species of Iris, native to Europe, western Asia and northwest Africa. Common names include yellow iris and yellow flag...
(I) - Iris verna var. smalliana (N)
- Iris versicolorIris versicolorIris versicolor, also commonly known as the Harlequin Blueflag, Larger Blue Flag, Northern Blue Flag, and other variations of those names, is a species of Iris native to North America where it is common in sedge meadows, marshes, and along streambanks and shores.-Growth:I. versicolor is a perennial...
(N) - Iris virginica var. shrevei (N)
- Isoetes engelmanniiIsoetes engelmanniiIsoetes engelmannii, commonly known as Engelmann's quillwort or Appalachian quillwort , is an aquatic pteridophyte and is the most widely distributed species of its genus in eastern North America...
(N) - Isoetes tenella (N)
- Isotria medeoloidesIsotria medeoloidesIsotria medeoloides is a terrestrial orchid found in temperate Eastern North America. Its range is from southern Maine south to Georgia and west to southern Ontario, Michigan, and Tennessee. A population was found in Missouri in 1897, but the plant is no longer believed extant there...
(N) - Isotria verticillata (N)
- Iva annua var. annuaIva annuaIva annua, sumpweed or marshelder, is an herbaceous annual plant native to much of North America.-Uses:Iva annua var. macrocarpa was formerly cultivated by Native Americans in the central eastern United States and specifically the indigenous peoples of the Kansas City Hopewell culture in present...
(N)
J
- Jacquemontia tamnifolia (N)
- Jeffersonia diphylla (N)
- Juglans cinerea (N)
- Juglans nigra (N)
- Juncus acuminatusJuncus acuminatusJuncus acuminatus is a species of rush known by the common names Tapertip Rush, Tufted Rush and Sharp-fruited Rush. It is native to North and Central America, where it can be found in and around water bodies from central Canada to Honduras. It is a rhizomatous perennial herb forming clumps up to...
(N) - Juncus alpinoarticulatus ssp. nodulosus (N)
- Juncus anthelatus (N)
- Juncus arcticus ssp. littoralis (N)
- Juncus articulatusJuncus articulatusJuncus articulatus is a species of rush known by the common name Jointleaf Rush, and more ambiguously as "Jointed Rush" which can also refer to J. kraussii from Australia . It is native to Eurasia and much of Canada and the United States. It grows in moist areas, such as wet sand, and thrives in...
(N) - Juncus biflorus (N)
- Juncus brachycarpus (N)
- Juncus brachycephalus (N)
- Juncus bufonius var. bufoniusJuncus bufoniusJuncus bufonius, known commonly as toad rush, is a common species of rush found worldwide. It grows in moist and muddy places and is considered a weed in many areas. This is an annual monocot that is quite variable in appearance. It is sometimes described as a complex of variants labeled with one...
(N) - Juncus canadensis (N)
- Juncus compressus (I)
- Juncus dichotomus (N)
- Juncus diffusissimus (N)
- Juncus dudleyi (N)
- Juncus effusus var. decipiens (N)
- Juncus effusus var. pylaei (N)
- Juncus effusus var. solutus (N)
- Juncus gerardii var. gerardiiJuncus gerardiiJuncus gerardii, commonly known as blackgrass, black needle rush or saltmarsh rush, is a member of the family Juncaceae.-Site:...
(N) - Juncus greenei (N)
- Juncus interior var. interiorJuncus interiorJuncus interior is a species of rush. It is known by the common name Interior Rush, and in its native range also as "Soft Rush" ....
(N) - Juncus marginatus (N)
- Juncus nodosus var. nodosusJuncus nodosusJuncus nodosus is a species of rush known by the common name knotted rush. It is native to much of North America from northern Canada to central Mexico, where it grows in wet places from freshwater to salt marsh habitat. This is a rhizomatous perennial herb producing slender, smooth stems up to...
(N) - Juncus secundus (N)
- Juncus × stuckeyi (N)
- Juncus subcaudatus var. subcaudatus (N)
- Juncus tenuis (N)
- Juncus torreyiJuncus torreyiJuncus torreyi is a species of rush known by the common name Torrey's rush. It is native to North America, where it is widespread. It can be found in many habitats across the southern half of Canada, coast to coast in the United States, and throughout northern Mexico. This is a perennial herb...
(N) - Juniperus communis var. depressaJuniperus communisJuniperus communis, the Common Juniper, is a species in the genus Juniperus, in the family Cupressaceae. It has the largest range of any woody plant, throughout the cool temperate Northern Hemisphere from the Arctic south in mountains to around 30°N latitude in North America, Europe and Asia.-...
(N) - Juniperus virginiana var. virginianaJuniperus virginianaJuniperus virginiana is a species of juniper native to eastern North America, from southeastern Canada to the Gulf of Mexico, east of the Great Plains...
(N) - Justicia americanaJusticia americanaAmerican Water-willow is a herbaceous, aquatic flowering plant in the Acanthus family native to North America. It is the hardiest species in the genus Justicia, the other members of which being largely tropical and subtropical, and it is able to survive as far north as USDA zone 4...
(N)
K
- Kalmia latifoliaKalmia latifoliaKalmia latifolia, commonly called Mountain-laurel or Spoonwood, is a species of flowering plant in the blueberry family, Ericaceae, that is native to the eastern United States. Its range stretches from southern Maine south to northern Florida, and west to Indiana and Louisiana. Mountain-laurel is...
(N) - Kerria japonica (I)
- Kickxia elatineKickxia elatineKickxia elatine is a species of flowering plant in the Figwort family known by several common names, including sharpleaf cancerwort and sharp-leaved fluellin. It is native to Europe and Asia, but it is present on other continents as an introduced species, and sometimes a noxious weed. This is a...
(I) - Kickxia spuriaKickxia spuriaKickxia spuria is a species of flowering plant in the figwort family known by several common names, including roundleaf cancerwort and round-leaved fluellin. It is native to Europe and Asia, but it is present on other continents as an introduced species, and sometimes a noxious weed. This is a low...
(I) - Koeleria macranthaKoeleria macranthaKoeleria macrantha is a species of grass known by the common name prairie Junegrass. In the UK it is known as Crested hair-grass. It is native to much of North America, from Alaska to California, from northern Mexico to the Eastern United States...
(N) - Koelreuteria paniculataKoelreuteria paniculataKoelreuteria paniculata, with the common name Goldenrain tree, is a species of Koelreuteria native to eastern Asia, in China and Korea...
(I) - Krigia biflora var. biflora (N)
- Krigia dandelion (N)
- Krigia virginica (N)
- Kummerowia stipulaceaKummerowia stipulaceaKummerowia stipulacea is a species of flowering plant in the legume family known by the common name Korean clover. It is native to China, Japan, Korea, and Russia, and it is present in the eastern United States as an introduced species....
(I) - Kummerowia striataKummerowia striataKummerowia striata is a species of flowering plant in the legume family known by the common name Japanese clover. It is native to much of Asia and it is present in the eastern United States as an introduced species....
(I) - Kyllinga pumila (N)
L
- Lablab purpureus (I)
- Lactuca biennisLactuca biennisLactuca biennis is a species of wild lettuce known by the common names tall blue lettuce and blue wood lettuce. It is native to the eastern half of the United States and Canada, but it can also be found in much of the western half as an introduced species. This is a biennial herb in the daisy...
(N) - Lactuca canadensisLactuca canadensisLactuca canadensis is a species of wild lettuce known by the common name Canada lettuce, or Canada wild lettuce. It is native to much of North America, especially in eastern regions, but it can be found all across the continent, having been introduced widely...
(N) - Lactuca floridana var. floridana (N)
- Lactuca floridana var. villosa (N)
- Lactuca hirsuta var. sanguinea (N)
- Lactuca × morssii (N)
- Lactuca salignaLactuca salignaLactuca saligna is a species of wild lettuce known by the common name willowleaf lettuce, and Least lettuce. It is native to Eurasia but it grows in many other places as an introduced species, including much of North America....
(I) - Lactuca sativa (I)
- Lactuca serriolaLactuca serriolaPrickly Lettuce is an annual or biennial plant, slightly foetid, that is commonly considered a weed of orchards, roadsides and field crops. The closest wild relative of cultivated lettuce , it grows throughout the temperate regions of all major continents. The leaves grow along a spiny stem and...
(I) - Lactuca tatarica var. pulchella (N)
- Lamium albumLamium albumLamium album is a flowering plant in the family Lamiaceae, native throughout Europe and Western Asia, growing in a variety of habitats from open grassland to woodland, generally on moist, fertile soils.-Growth:...
(I) - Lamium amplexicauleLamium amplexicauleLamium amplexicaule is a species of Lamium native to Europe, western Asia and northern Africa....
(I) - Lamium maculatumLamium maculatumLamium maculatum is a flowering plant in the family Lamiaceae.-Description:...
(I) - Lamium purpureum var. purpureum (I)
- Laportea canadensisLaportea canadensisLaportea canadensis or wood-nettle, is an annual or perennial herbaceous plant of the nettle family Urticaceae, native to eastern and central North America...
(N) - Lappula squarrosaLappula squarrosaLappula squarrosa is a species of flowering plant in the borage family known by several common names, including European stickseed, bluebur, and bristly sheepbur. It is native to Europe and Asia, where it is common, and it is an introduced species in much of North America and Africa...
(I) - Lapsana communis (I)
- Larix laricina (N)
- Lathyrus japonicus var. maritimusLathyrus japonicusLathyrus japonicus is a legume native to temperate coastal areas of Asia, Europe, North and South America....
(N) - Lathyrus japonicus var. parviflorusLathyrus japonicusLathyrus japonicus is a legume native to temperate coastal areas of Asia, Europe, North and South America....
(N) - Lathyrus latifolius (I)
- Lathyrus ochroleucus (N)
- Lathyrus odoratus (I)
- Lathyrus palustrisLathyrus palustrisLathyrus palustris is a species of wild pea known by the common name marsh pea. It is native to Europe, Asia, and North America. It is a perennial herb with leaves made up of oval-shaped or oblong leaflets a few centimeters long. It has branched, coiled tendrils. The plant bears an inflorescence of...
(N) - Lathyrus pratensis (I)
- Lathyrus tuberosusLathyrus tuberosusLathyrus tuberosus, also known as the Tuberous Pea, Tuberous Vetchling, Earthnut Pea, or Aardaker, is a small, climbing perennial plant, native in moist temperate parts of Europe and Western Asia....
(I) - Lathyrus venosus (N)
- Leavenworthia uniflora (N)
- Lechea intermedia var. intermedia (N)
- Lechea minor (N)
- Lechea mucronata (N)
- Lechea pulchella var. moniliformis (N)
- Lechea pulchella var. pulchella (N)
- Lechea racemulosa (N)
- Lechea tenuifolia (N)
- Ledum groenlandicum (N)
- Leersia lenticularis (N)
- Leersia oryzoidesLeersia oryzoidesLeersia oryzoides is a species of grass known by the common name rice cutgrass. It is a widespread grass native to Europe, Asia, and North America and present in many other regions, such as Australia, as an introduced species. This is a rhizomatous perennial grass growing to a maximum height...
(N) - Leersia virginicaLeersia virginicaLeersia virginica, commonly known as whitegrass, white cutgrass, or Virginian cutgrass, is a perennial grass that is native to eastern North America, typically found in partially shaded low-lying wet areas....
(N) - Lemna minorLemna minorLemna minor is a species of Lemna with a subcosmopolitan distribution, native throughout most of Africa, Asia, Europe and North America, occurring everywhere that freshwater ponds and slow-moving streams occur, except for arctic and subarctic climates...
(N) - Lemna minutaLemna minutaLemna minuta is a species of duckweed known by the common name least duckweed. It is the smallest Lemna species. It is native to parts of the Americas, and naturalized in others; the exact native range is not known. It is found on other continents as a non-native introduction as well...
(N) - Lemna obscura (N)
- Lemna perpusilla (N)
- Lemna trisulcaLemna trisulcaLemna trisulca L. is a species of aquatic plants in the genus Lemna with a subcosmopolitan distribution, occurring in quiet freshwater habitats in cool temperate regions. L. trisulca normally doesn't occur in warm temperate regions...
(N) - Lemna turionifera (N)
- Lemna valdivianaLemna valdivianaLemna valdiviana is a species of duckweed known by the common name valdivia duckweed. It is native to much of the Americas. It is a minute flowering plant which grows in mats on the surface of calm bodies of freshwater. The individual plant is a flat, translucent, pale green oval body 2 to 4...
(N) - Leontodon autumnalis ssp. autumnalisLeontodon autumnalisLeontodon autumnalis is a plant species in the genus Leontodon. It is widespread in its native range in Eurasia , and has been introduced in North America. The fly Tephritis leontodontis is known to attack the capitula of this plant....
(I) - Leontodon autumnalis ssp. pratensisLeontodon autumnalisLeontodon autumnalis is a plant species in the genus Leontodon. It is widespread in its native range in Eurasia , and has been introduced in North America. The fly Tephritis leontodontis is known to attack the capitula of this plant....
(I) - Leontodon hispidus ssp. danubialis (I)
- Leontodon taraxacoides ssp. taraxacoidesLeontodon taraxacoidesLeontodon taraxacoides is a species of hawkbit known by the common name lesser hawkbit. It is native to Europe and North Africa but it can be found in many other places across the globe as an introduced species and often a noxious weed. This is a dandelion-like herb growing patches of many erect,...
(I) - Leonurus cardiaca ssp. cardiaca (I)
- Leonurus sibiricusLeonurus sibiricusLeonurus sibiricus, commonly called Honeyweed or Siberian motherwort, is an herbaceous plant species native to central and Southwest Asia, including China, Mongolia, and Russia...
(I) - Lepidium campestreLepidium campestreLepidium campestre is an annual plant in the Brassicaceae or mustard family, native to Europe, but commonly found in North America as an invasive weed. The most notable characteristic of field pepperweed is the raceme of flowers which forks off of the stem...
(I) - Lepidium densiflorum var. densiflorumLepidium densiflorumLepidium densiflorum is a species of flowering plant in the mustard family known by the common names common pepperweed and prairie peppergrass. It is a common and widespread plant in North America, where it grows in many habitats across Canada and the United States...
(N) - Lepidium perfoliatumLepidium perfoliatumLepidium perfoliatum is a species of flowering plant in the mustard family known by the common name clasping pepperweed. It is native to Europe and Asia and it can be found in other parts of the world as an introduced species....
(I) - Lepidium ramosissimum var. bourgeauanum (N)
- Lepidium ruderale (I)
- Lepidium sativum (I)
- Lepidium virginicum var. virginicumLepidium virginicumLepidium virginicum, also known as Virginia pepperweed or peppergrass, is an annual or biennial plant in the Brassicaceae or mustard family. It is native to much of North America, including most of the United States and Mexico and southern regions of Canada, as well as most of Central America...
(N) - Leptochloa fusca ssp. fascicularis (N)
- Leptochloa panicea ssp. brachiata (N)
- Lespedeza × acuticarpa (N)
- Lespedeza bicolorLespedeza bicolorLespedeza bicolor is a species of flowering plant in the legume family known by the common names shrubby bushclover, shrub lespedeza, and bicolor lespedeza. It is native to Asia and it is widely grown as an ornamental plant...
(I) - Lespedeza × brittonii (N)
- Lespedeza capitata (N)
- Lespedeza cuneataLespedeza cuneataLespedeza cuneata is a species of flowering plant in the legume family known by the common names Chinese bushclover and sericea lespedeza, or just sericea...
(I) - Lespedeza formosa (I)
- Lespedeza frutescens (N)
- Lespedeza hirta ssp. hirta (N)
- Lespedeza × nuttallii (N)
- Lespedeza procumbens (N)
- Lespedeza repens (N)
- Lespedeza thunbergii (I)
- Lespedeza violacea (N)
- Lespedeza virginica (N)
- Lesquerella globosa (N)
- Leucanthemum maximumLeucanthemum maximumLeucanthemum maximum is a species of flowering plants in the aster family known by the common name max chrysanthemum. It is native to France and Spain but it can be found growing wild in other parts of the world as an introduced species and sometimes a garden escapee...
(I) - Leucanthemum vulgare (I)
- Leucojum aestivum ssp. aestivum (I)
- Leucospora multifida (N)
- Levisticum officinale (I)
- Liatris aspera var. asperaLiatris asperaLiatris aspera also known as the lacerate, rough, tall or prairie blazing star is a wildflower that is found the mid to eastern United States in habitats that range from mesic to dry prairie and dry savanna....
(N) - Liatris aspera var. intermediaLiatris asperaLiatris aspera also known as the lacerate, rough, tall or prairie blazing star is a wildflower that is found the mid to eastern United States in habitats that range from mesic to dry prairie and dry savanna....
(N) - Liatris cylindraceaLiatris cylindraceaLiatris cylindracea, also known as Barrelhead gayfeather, Cylindrical blazing star, or Ontario blazing star, is a plant species in the aster family Asteraceae and genus Liatris. It is native to north eastern and central North America, where it is found in habitats such as prairies, limestone and...
(N) - Liatris punctata var. punctataLiatris punctataLiatris punctata is a species of flowering plant in the aster family known by the common names dotted gayfeather, dotted blazingstar, and narrow-leaved blazingstar. It is native to North America, where it occurs throughout the plains of central Canada, the central United States, and northern...
(N) - Liatris pycnostachya var. pycnostachyaLiatris pycnostachyaLiatris pycnostachya is an ornamental plant native to the tallgrass prairies of the Midwestern United States.-External links:*...
(N) - Liatris scariosa var. nieuwlandii (N)
- Liatris spheroidea (N)
- Liatris spicata var. spicataLiatris spicataLiatris spicata, the dense blazing star or prairie gay feather, is an herbaceous perennial plant native throughout most of eastern North America....
(N) - Liatris squarrosa var. squarrosa (N)
- Liatris squarrulosa (N)
- Ligusticum canadense (N)
- Ligustrum obtusifoliumLigustrum obtusifoliumLigustrum obtusifolium is a species of privet, native to Japan, Korea and China.It is a deciduous shrub growing to 3 m tall. The leaves are 1-6 cm long and 4-25 mm broad.There are three subspecies:...
(I) - Ligustrum ovalifoliumLigustrum ovalifoliumLigustrum ovalifolium, also known as Oval-Leaved Privet, is a semi-evergreen shrub used extensively for hedging, and sometimes for other garden uses. The species comes from Japan...
(I) - Ligustrum vulgareLigustrum vulgareLigustrum vulgare , is a species of Ligustrum native to central and southern Europe, north Africa and southwestern Asia, from southern England and southwestern Sweden south to Morocco, and east to Poland and northwestern Iran.It is a semi-evergreen or deciduous shrub, growing to 3 m...
(I) - Lilium canadense ssp. canadenseLilium canadenseLilium canadense, commonly called either the Canada Lily, Wild Yellow-Lily, or the Meadow Lily, is a native of eastern North America. Flowers emerge in June, and are nodding, yellow, orange or red, with spots...
(N) - Lilium canadense ssp. editorumLilium canadenseLilium canadense, commonly called either the Canada Lily, Wild Yellow-Lily, or the Meadow Lily, is a native of eastern North America. Flowers emerge in June, and are nodding, yellow, orange or red, with spots...
(N) - Lilium lancifoliumLilium lancifoliumLilium lancifolium is a species of lily native to northern and eastern Asia, including Japan. It is one of several species of lily to which the common name Tiger lily is applied, and is the species most widely known by this name....
(I) - Lilium michiganenseLilium michiganenseLilium michiganense is a species of true lily commonly referred to as the Michigan Lily. It is a wildflower present in prairie habitats in the eastern United States and Canada, as far southwest as Oklahoma....
(N) - Lilium philadelphicum var. andinumLilium philadelphicumLilium philadelphicum, also known as the Wood Lily, Philadelphia Lily, Prairie Lily or Western Red Lily, is a perennial species of lily native to North America...
(N) - Lilium philadelphicum var. philadelphicumLilium philadelphicumLilium philadelphicum, also known as the Wood Lily, Philadelphia Lily, Prairie Lily or Western Red Lily, is a perennial species of lily native to North America...
(N) - Lilium superbumLilium superbumLilium superbum is a species of true lily native to the eastern and central regions of North America. Common names include, Turk's cap lily, turban lily, swamp lily or American tiger lily...
(N) - Linaria dalmatica ssp. dalmaticaLinaria dalmaticaLinaria dalmatica is a herbaceous plant native to western Asia and southeastern Europe that has become a weed in other areas. Its common names include Balkan toadflax, broadleaf toadflax, and Dalmatian toadflax.- External Links :...
(I) - Linaria genistifolia (I)
- Linaria vulgarisLinaria vulgarisLinaria vulgaris is a species of toadflax , native to most of Europe and northern Asia, from the United Kingdom south to Spain in the west, and east to eastern Siberia and western China...
(I) - Lindera benzoin var. benzoinLindera benzoinLindera benzoin is a flowering plant in the family Lauraceae, native to eastern North America, ranging from Maine to Ontario in the north, and to Kansas, Texas and northern Florida in the south.-Characteristics:Spicebush is a medium-sized deciduous shrub growing to 5 m...
(N) - Lindera benzoin var. pubescensLindera benzoinLindera benzoin is a flowering plant in the family Lauraceae, native to eastern North America, ranging from Maine to Ontario in the north, and to Kansas, Texas and northern Florida in the south.-Characteristics:Spicebush is a medium-sized deciduous shrub growing to 5 m...
(N) - Lindernia dubia var. anagallideaLindernia dubiaLindernia dubia is a species of flowering plant known by the common names yellowseed false pimpernel and moist bank pimpernel. It is a member of the "new" plant family Linderniaceae, and it is sometimes treated as a member of the families Scrophulariaceae and Plantaginaceae...
(N) - Lindernia dubia var. dubiaLindernia dubiaLindernia dubia is a species of flowering plant known by the common names yellowseed false pimpernel and moist bank pimpernel. It is a member of the "new" plant family Linderniaceae, and it is sometimes treated as a member of the families Scrophulariaceae and Plantaginaceae...
(N) - Linnaea borealis ssp. americana (N)
- Linum grandiflorumLinum grandiflorumLinum grandiflorum is a species of flax known by several common names, including red flax, scarlet flax, and crimson flax. It is native to Algeria, but it is known elsewhere in Northern Africa, Southern Europe and in several locations in North America as an introduced species...
(I) - Linum medium var. texanumLinum mediumLinum medium is a species of Linum native to eastern North America, as far west as Texas and Wisconsin, east to the Atlantic ocean, and north to Ontario and Maine. It is one of several yellow-flowered Linum species in this region; others include Linum virginianum....
(N) - Linum perenneLinum perenneLinum perenne , is a flowering plant in the family Linaceae, native to Europe, primarily in the Alps, but also locally in England....
(I) - Linum perenneLinum perenneLinum perenne , is a flowering plant in the family Linaceae, native to Europe, primarily in the Alps, but also locally in England....
(N) - Linum striatum (N)
- Linum sulcatum var. sulcatum (N)
- Linum usitatissimum (I)
- Linum virginianum (N)
- Liparis liliifolia (N)
- Liparis loeseliiLiparis loeseliiLiparis loeselii is a species of orchid endemic native to Europe, the eastern United States and eastern Canada. It grows in fens, bogs and dune slacks. Known as the Fen Orchid, it is a yellow flowering plant with glossy yellow-green leaves.-Synonyms:...
(N) - Lipocarpha drummondii (N)
- Lipocarpha micrantha (N)
- Liquidambar styraciflua (N)
- Liriodendron tulipiferaLiriodendron tulipiferaLiriodendron tulipifera, commonly known as the tulip tree, American tulip tree, tuliptree, tulip poplar or yellow poplar, is the Western Hemisphere representative of the two-species genus Liriodendron, and the tallest eastern hardwood...
(N) - Listera cordata var. cordata (N)
- Lithospermum canescensLithospermum canescensLithospermum canescens is a species of flowering plant known by the common name Hoary Puccoon. It is endemic to eastern North America. The plant has golden yellow flowers which bloom from April to May....
(N) - Lithospermum caroliniense var. croceumLithospermum carolinienseLithospermum caroliniense is commonly known as the Hairy puccoon or Carolina puccoon. It is found in the United States in the Midwest, around the Great Lakes, and through the Canadian provinces surrounding the Great Lakes. The plant grows in sandhills, pine barrens and dry, sandy woods.Dr. Robert...
(N) - Lithospermum latifolium (N)
- Lithospermum officinaleLithospermum officinaleLithospermum officinale or Common Gromwell or European Stoneseed is a plant species of the genus Lithospermum.Its leaves are eaten by the caterpillars of the moth Ethmia pusiella....
(I) - Lobelia cardinalisLobelia cardinalisLobelia cardinalis is a species of Lobelia native to the Americas, from southeastern Canada south through the eastern and southwestern United States, Mexico and Central America to northern Colombia...
(N) - Lobelia inflataLobelia inflataLobelia inflata is a species of Lobelia native to eastern North America, from southeastern Canada south through the eastern United States to Alabama and west to Kansas.-Growth:...
(N) - Lobelia kalmiiLobelia kalmiiLobelia kalmii is a species of flowering plant with a distribution primarily across Canada and the northern United States in temperate and boreal regions...
(N) - Lobelia puberula var. simulans (N)
- Lobelia siphilitica var. siphiliticaLobelia siphiliticaThe Great Blue Lobelia is a species within the Campanulaceae family. It is an herbaceous, perennial dicot native to eastern and central Canada and United States. Growing up to a meter tall, it lives in zones 4 to 9 in moist to wet soils. It produces a spike of zygomorphic flowers in the late...
(N) - Lobelia spicata var. campanulata (N)
- Lobelia spicata var. leptostachys (N)
- Lobelia spicata var. spicata (N)
- Lobularia maritimaLobularia maritimaLobularia maritima, common name Sweet Alyssum or Sweet Alison, also commonly referred to as just Alyssum from the genus in which it was formerly classified, is a low-growing flowering plant in the family Brassicaceae.-Etymology:...
(I) - Lolium perenne ssp. multiflorumLolium perenneLolium perenne, common name Perennial Ryegrass, is a grass from the family Poaceae. It is native to Europe, Asia and northern Africa, but is widely cultivated and naturalised around the world.-Description:...
(I) - Lolium perenne ssp. perenneLolium perenneLolium perenne, common name Perennial Ryegrass, is a grass from the family Poaceae. It is native to Europe, Asia and northern Africa, but is widely cultivated and naturalised around the world.-Description:...
(I) - Lolium temulentum ssp. temulentumLolium temulentumLolium temulentum, typically known as darnel, poison darnel or cockle, is an annual plant that forms part of the Poaceae family and part of the Lolium genus. The plant stem can grow up to one meter tall, with inflorescence in the ears and purple grain...
(I) - Lonicera × bella (I)
- Lonicera canadensisLonicera canadensisLonicera canadensis is a flowering deciduous, perennial, phanerophytic shrub which is monoclinous and grows 1–2 m tall. It is the only member of its genus with hairless leaf structures. It typically flowers from the last week of April until the third or fourth week of May...
(N) - Lonicera dioica (N)
- Lonicera flava (N)
- Lonicera fragrantissima (I)
- Lonicera japonica (I)
- Lonicera × minutiflora (I)
- Lonicera morrowii (I)
- Lonicera maackiiLonicera maackiiLonicera maackii is a species of honeysuckle in the family Caprifoliaceae, native to temperate Asia in northern and western China , Mongolia, Japan , Korea, and southeastern Russia .It is listed as an endangered species in Japan...
(I) - Lonicera oblongifolia (N)
- Lonicera reticulata (N)
- Lonicera ruprechtiana (I)
- Lonicera × salicifolia (I)
- Lonicera sempervirensLonicera sempervirensLonicera sempervirens is a species of honeysuckle native to the eastern United States.It is an evergreen twining shrubby vine growing to several meters high through shrubs and young trees...
(N) - Lonicera tataricaLonicera tataricaLonicera tatarica is a species of honeysuckle known by the common name Tatarian honeysuckle. It is native to Siberia and other parts of eastern Asia, but it is probably better known in North America, where it is a widespread introduced species and noxious weed...
(I) - Lonicera villosa var. tonsa (N)
- Lonicera × xylosteoides (I)
- Lonicera xylosteumLonicera xylosteumLonicera xylosteum, commonly known as Fly honeysuckle, European Fly Honeysuckle, Dwarf Honeysuckle or Fly Woodbine is a deciduous shrub. It is one of two honeysuckles native to Britain, the other being the Common Honeysuckle ....
(I) - Lotus corniculatus var. corniculatusLotus corniculatusLotus corniculatus is a common flowering plant native to grassland temperate Eurasia and North Africa. The common name is Bird's-foot Trefoil , though the common name is often also applied to other members of the genus...
(I) - Lotus glaberLotus glaberLotus glaber is a flowering plant of the pea family Fabaceae, native to western and southern Europe and southwest Asia. Some botanists treat it as a subspecies of Lotus corniculatus, as L. corniculatus subsp. tenuifolius.Its tolerance of salt and poor soil make this plant useful for marginal...
(I) - Ludwigia alternifoliaLudwigia alternifoliaLudwigia alternifolia, commonly known as Bushy seedbox and Rattlebox, is a herbaceous perennial plant of the family Onagraceae.Its habitat includes wet, swampy localities....
(N) - Ludwigia decurrens (N)
- Ludwigia leptocarpa (N)
- Ludwigia palustrisLudwigia palustrisLudwigia palustris is a species of flowering plant in the evening primrose family known by the common names marsh seedbox and water purslane. Its native distribution is unclear, but includes parts of the Americas; it can be found on most continents and spreads easily to become naturalized. It is...
(N) - Ludwigia peploidesLudwigia peploidesLudwigia peploides is a species of flowering plant in the evening primrose family known by the common names floating primrose-willow and creeping water primrose. It is native to many parts of the Americas, but it can be found on many continents and spreads easily to become naturalized...
(I) - Ludwigia peploides ssp. glabrescensLudwigia peploidesLudwigia peploides is a species of flowering plant in the evening primrose family known by the common names floating primrose-willow and creeping water primrose. It is native to many parts of the Americas, but it can be found on many continents and spreads easily to become naturalized...
(N) - Ludwigia polycarpa (N)
- Lunaria annua (I)
- Lupinus perennis ssp. perennis var. occidentalisLupinus perennisLupinus perennis is a medicinal plant in the Fabaceae family...
(N) - Lupinus perennis ssp. perennis var. perennisLupinus perennisLupinus perennis is a medicinal plant in the Fabaceae family...
(N) - Lupinus perennis ssp. perennisLupinus perennisLupinus perennis is a medicinal plant in the Fabaceae family...
(N) - Luzula acuminata ssp. acuminata (N)
- Luzula acuminata ssp. carolinae (N)
- Luzula bulbosa (N)
- Luzula echinata (N)
- Luzula multiflora ssp. multiflora var. multifloraLuzula multifloraLuzula multiflora, the Heath Wood-rush, is a species of flowering plant in the rush family. It is native to North America, found in Canada and all regions of the U.S. except the Southwest.- References :* * * Fl. Spa. 1:169. 1811...
(N) - Luzula multiflora ssp. multifloraLuzula multifloraLuzula multiflora, the Heath Wood-rush, is a species of flowering plant in the rush family. It is native to North America, found in Canada and all regions of the U.S. except the Southwest.- References :* * * Fl. Spa. 1:169. 1811...
(N) - Lychnis coronariaLychnis coronariaSilene coronaria is a species of flowering plant in the carnation family, Caryophyllaceae, that is native to Asia and Europe. Common names include Dusty Miller , Mullein-pink, Rose Campion, and Bloody William. It is cultivated as an ornamental.-References:* Armitage, Allan M...
(I) - Lychnis flos-cuculi (I)
- Lychnis viscaria (I)
- Lycium barbarum (I)
- Lycium chinense (I)
- Lycopodiella inundataLycopodiella inundataLycopodiella inundata is a species of club moss known by the common names inundated club moss, marsh club moss and northern bog club moss. It has a circumpolar and circumboreal distribution, occurring throughout the northern Northern Hemisphere from the Arctic to montane temperate regions in...
(N) - Lycopodiella margueritiae (N)
- Lycopodiella subappressa (N)
- Lycopodium clavatumLycopodium clavatumLycopodium clavatum is the most widespread species in the genus Lycopodium of the clubmoss family Lycopodiaceae....
(N) - Lycopodium dendroideumLycopodium dendroideumLycopodium dendroideum is a clubmoss native to the northeastern United States. It is part of a complex of species colloquially known as groundpine and which was originally all lumped under the species Lycopodium obscurum. This species was known as L. obscurum L. var...
(N) - Lycopodium digitatum (N)
- Lycopodium × habereri (N)
- Lycopodium hickeyi (N)
- Lycopodium lagopus (N)
- Lycopodium obscurumLycopodium obscurumLycopodium obscurum, commonly called ground pine or princess pine, is a species of clubmoss in the family Lycopodiaceae. It is a close relative of other treelike Lycopodium such as L. dendroideum and L. Hickeyi. It is distributed from Alabama to the east coast of the United States, and north into...
(N) - Lycopodium tristachyum (N)
- Lycopus americanusLycopus americanusLycopus americanus, common names Water horehound or American bugleweed, is a member of the genus Lycopus.It blooms in late summer and is found in much of North America.-Medicinal plant:...
(N) - Lycopus asperLycopus asperLycopus asper is a species of flowering plant in the mint family known by the common name rough bugleweed. It is native to much of North America, where it can be found most often in moist areas, such as the soil near lakes. This is a perennial herb growing from a rhizome with thick, knobby tips...
(N) - Lycopus europaeus (I)
- Lycopus rubellus (N)
- Lycopus × sherardii (N)
- Lycopus uniflorus var. uniflorusLycopus uniflorusLycopus uniflorus is a species of flowering plant in the mint family known by the common name northern bugleweed. It is native to much of North America, where it can be found most often in moist areas, such as marshes. This is a perennial herb growing from a slender rhizome with thickened,...
(N) - Lycopus virginicus (N)
- Lycoris squamigeraLycoris squamigeraLycoris squamigera is a plant in the amaryllis family, Amaryllidaceae, subfamily Amaryllidoideae.-Description:...
(I) - Lygodium palmatumLygodium palmatumLygodium palmatum is the only species of its genus native to North America. Unlike most species in the genus, this one, called the climbing fern or Hartford fern Lygodium palmatum is the only species of its genus native to North America. Unlike most species in the genus, this one, called the...
(N) - Lyonia ligustrina var. ligustrina (N)
- Lysimachia ciliataLysimachia ciliataLysimachia ciliata is a plant in the Myrsinaceae family. It is a herbaceous plant with opposite, simple leaves, and smooth, green stems. The flowers are yellow, borne in summer. It is native to North America, including most of southern Canada and most of the United States except for the southwest....
(N) - Lysimachia lanceolata (N)
- Lysimachia nummulariaLysimachia nummulariaLysimachia nummularia is a low, creeping plant of the genus Lysimachia. It is commonly called Creeping Jenny, Moneywort, Herb Twopence and Twopenny grass.-Distribution:...
(I) - Lysimachia × producta (N)
- Lysimachia punctataLysimachia punctataLysimachia punctata is a plant species in the genus Lysimachia....
(I) - Lysimachia quadriflora (N)
- Lysimachia quadrifoliaLysimachia quadrifoliaLysimachia quadrifolia is a herbaceous plant in the Myrsinaceae family. It has simple leaves in whorls of 3-7 , and erect stems. It grows to a height of about one meter. The flowers have five pointed, yellow petals with a splash of red near the center.It is native to the eastern United States and...
(N) - Lysimachia terrestrisLysimachia terrestrisLysimachia terrestris is a plant in the Primulaceae family.-Description:Lysimachia terrestris is a herbaceous plant with opposite, simple leaves, and erect stems. The flowers are yellow, borne in mid-summer.The flowers are star-shaped with five yellow petals...
(N) - Lysimachia thyrsifloraLysimachia thyrsifloraLysimachia thyrsiflora, commonly known as Tufted Loosestrife, is a plant in the genus Lysimachia. It is native to large sections of the northern Northern Hemisphere, including Eurasia and North America. It often grows in marshes, shorelines of lakes and ponds and occasionally along streams...
(N) - Lysimachia vulgarisLysimachia vulgarisLysimachia vulgaris is a species of herbaceous perennial plants in the genus Lysimachia native to wetlands, damp meadows and forests of Eurasia. It is a 50-150 cm tall plant with an upright habit, blooming from June through August with erect panicles of conspicuous yellow flowers. L...
(I) - Lythrum alatum var. alatumLythrum alatumLythrum alatum, commonly known as winged loosestrife or winged lythrum, is a species of flowering plant belonging to the family Lythraceae. It is endemic to wetland areas in central and eastern United States and Ontario.-Description:...
(N) - Lythrum hyssopifolium (I)
- Lythrum portulaLythrum portulaLythrum portula is a species of flowering plant in the loosestrife family known by the common name spatulaleaf loosestrife. It is native to Europe, and it is found in parts of western North America as an introduced species. It often grows in moist habitat, such as marshes...
(I) - Lythrum salicaria (I)
M
- Macleaya cordataMacleaya cordataMacleaya cordata is a poisonous plant, which is used ornamentally.Macleaya cordata is a source of bioactive compounds, mainly isoquinoline alkaloids which are used in phytopreparations with anti-inflammatory and antimicrobial activities...
(I) - Maclura pomifera (N)
- Magnolia acuminata (N)
- Magnolia fraseri (N)
- Magnolia macrophylla (N)
- Magnolia × soulangeanaMagnolia × soulangeanaMagnolia × soulangeana is a hybrid plant in the genus Magnolia and family Magnoliaceae. It is a deciduous tree with large, early-blooming flowers in various shades of white, pink, and purple...
(I) - Magnolia stellata (I)
- Magnolia tripetala (N)
- Mahonia aquifolium (N)
- Maianthemum canadenseMaianthemum canadenseMaianthemum canadense Maianthemum canadense Maianthemum canadense (Canadian May-lily, Canada Mayflower, False Lily-of-the-valley, Canadian Lily-of-the-valley, Wild Lily-of-the-valley, Two-leaved Solomonseal; syn. Maianthemum canadense var. interius Fern., Maianthemum canadense var...
(N) - Maianthemum racemosum ssp. racemosumMaianthemum racemosumMaianthemum racemosum is a species of flowering plant, native to North America....
(N) - Maianthemum stellatumMaianthemum stellatumMaianthemum stellatum is a species of flowering plant, native across North America generally from Alaska to California in the west and from Newfoundland to the central Appalachian Mountains in the east...
(N) - Maianthemum trifoliumMaianthemum trifoliumMaianthemum trifolium is a species of flowering plant that is native to Canada and the northeastern United States, from Yukon and British Columbia east to Newfoundland and south to Delaware.It is a herbaceous perennial plant growing to 25 cm tall, with alternate,...
(N) - Malaxis unifoliaMalaxis unifoliaMalaxis unifolia is a species of orchid occurring from eastern Canada, central and eastern US to Central America and the Caribbean.-Synonyms:*Orchis ophioglossoides Walter*Malaxis ophioglossoides Muhl. ex Willd....
(N) - Malus angustifolia var. angustifoliaMalus angustifoliaMalus angustifolia, or Southern crabapple, is a species of crabapple. The fruit is astringent and acidic and is not palatable when raw. The fruit can be use to make jellies, jams and food preserves. The fruits are small and have an aromatic scent and a pear-like shape. It is a tree that is grown as...
(N) - Malus baccataMalus baccataMalus baccata is a species of apple known by the common names Siberian crabapple, Siberian crab, Manchurian crab apple and Chinese crab apple. It is native to most of Asia, but is also grown elsewhere as an ornamental tree and for rootstock. It is used for bonsai in Japan...
(I) - Malus coronariaMalus coronariaMalus coronaria, also known by the names sweet crabapple or garland crab, is a North American species of Malus . It often is a bushy shrub with rigid, contorted branches, but frequently becomes a small tree with a broad open head. It prefers rich moist soil and is most abundant east of the...
(N) - Malus floribundaMalus floribundaMalus floribunda, or Japanese flowering crabapple, originates from Japan and East Asia. It may be a wild species, or a hybrid of M. sieboldii x M. baccata....
(I) - Malus ioensis var. ioensisMalus ioensisMalus ioensis, or the prairie crabapple, is a species of crabapple tree native to the United States. The most common variety, Malus ioensis var. ioensis, is found primarily in the prairie regions of the upper Mississippi Valley. Another variety, Malus ioensis var...
(N) - Malus × platycarpa (N)
- Malus pumila (I)
- Malus toringo (I)
- Malus zumi (I)
- Malva alceaMalva alceaMalva alcea is a plant in the mallow family native to southwestern, central and eastern Europe and southwestern Asia, from Spain north to southern Sweden and east to Russia and Turkey.-Description:It is a herbaceous perennial plant growing to 50–125 cm tall, with stems covered...
(I) - Malva moschataMalva moschataMalva moschata is a species of Malva native to Europe and southwestern Asia, from Spain north to the British Isles and Poland, and east to southern Russia and Turkey....
(I) - Malva neglectaMalva neglectaMalva neglecta is also known as Common mallow in the United States and also buttonweed, cheeseplant, cheeseweed, dwarf mallow and roundleaf mallow.Although often considered a weed, this plant is reportedly consumed as a food...
(I) - Malva pusilla (I)
- Malva sylvestrisMalva sylvestrisMalva sylvestris is a species of the Mallow genus Malva in the family of Malvaceae and is considered to be the type species for the genus...
(I) - Malva verticillataMalva verticillataMalva verticillata, also known as the Chinese Mallow is a species of the Mallow genus Malva in the family of Malvaceae found in East Asia. M. verticillata is an annual or biennial that grow up to 1.7 meters in high and can inhabit woodland areas of different soil types. In temperate climates, it...
(I) - Manfreda virginicaManfreda virginicaManfreda virginica, commonly known as the False Aloe or Rattlesnake Master, is a species of flowering plant related to agaves. It is native to an area stretching from North Carolina west to Texas in the United States and south to Nuevo León and Tamaulipas in Mexico.-Description:False Aloe is...
(N) - Marrubium vulgareMarrubium vulgareMarrubium vulgare is a flowering plant in the family Lamiaceae, native to Europe, northern Africa and Asia....
(I) - Marsilea quadrifoliaMarsilea quadrifolia-Common names:'Four Leaf Clover'; European waterclover ; Sushni in parts of India; "aaraik keerai" in Tamil and is in use for more than 3000 years as part of food.-Origins:M...
(I) - Marsilea quadrifoliaMarsilea quadrifolia-Common names:'Four Leaf Clover'; European waterclover ; Sushni in parts of India; "aaraik keerai" in Tamil and is in use for more than 3000 years as part of food.-Origins:M...
(N) - Matelea obliqua (N)
- Matricaria discoidea (I)
- Matricaria recutita (I)
- Matteuccia struthiopteris (N)
- Mazus pumilus (I)
- Medeola virginianaMedeola virginianaMedeola virginiana or Indian Cucumber-root is a perennial plant in the genus Medeola.-Description:It occurs with either a single tier or two tiers of leaves. The upper tier consists of from three to five whorled leaves on the stem above a lower tier of five to nine...
(N) - Medicago lupulinaMedicago lupulinaMedicago lupulina is a summer annual or perennial plant usually considered a weed. It has a tap root. Like other legumes, it has three leaflets; its center leaflet is on a separate petiole...
(I) - Medicago polymorphaMedicago polymorphaMedicago polymorpha is a plant species of the genus Medicago. It is native to the Mediterranean basin but is found throughout the world. It forms a symbiotic relationship with the bacterium Sinorhizobium medicae, which is capable of nitrogen fixation...
(I) - Medicago sativa ssp. falcata (I)
- Medicago sativa ssp. sativa (I)
- Meehania cordataMeehania cordataMeehania cordata, also known as Meehan's Mint or Creeping Mint, is a perennial plant of the genus Meehania, within the family Lamiaceae found in moist shady banks west of Pennsylvania to Illinois, Tennessee, and North Carolina around the month of June....
(N) - Melampyrum lineare var. latifoliumMelampyrum lineareMelampyrum lineare or narrowleaf cow wheat is a hemiparasitic plant native to North America, especially southern Canada through the eastern United States. Leaves have two forms. Lower on the plant leaves are linear. Below the flowers, leaves have two pointed lobes behind the usual linear structure....
(N) - Melampyrum lineare var. lineareMelampyrum lineareMelampyrum lineare or narrowleaf cow wheat is a hemiparasitic plant native to North America, especially southern Canada through the eastern United States. Leaves have two forms. Lower on the plant leaves are linear. Below the flowers, leaves have two pointed lobes behind the usual linear structure....
(N) - Melica nitens (N)
- Melilotus altissimusMelilotus altissimusMelilotus altissimus or Tall Melilot is a plant species of the genus Melilotus. This plant comes in many types of forms. They are found in Asia, Europe, Egypt, and now they are found worldwide. They are a long stalk like plant with green leaves and stems that shoot out of the ground....
(I) - Melilotus officinalisMelilotus officinalisMelilotus officinalis, known as the yellow sweet clover, yellow melilot, ribbed melilot or common melilot is a species of legume native to Eurasia and introduced in North America, Africa and Australia.-Description:...
(I) - Melissa officinalis (I)
- Menispermum canadense (N)
- Mentha aquatica (I)
- Mentha arvensisMentha arvensisMentha arvensis is a species of mint with a circumboreal distribution. It is native to the temperate regions of Europe and western and central Asia, east to the Himalaya and eastern Siberia, and North America.It is a herbaceous perennial plant growing to 10–60 cm tall...
(N) - Mentha × gracilisMentha × gracilisThe mint hybrid Mentha × gracilis is known by the common names of gingermint, redmint and Scotchmint. It is a mint species within the genus Mentha. Gingermint is a hybrid between Mentha arvensis and Mentha spicata....
(I) - Mentha × piperita (N)
- Mentha × rotundifolia (I)
- Mentha spicata (I)
- Mentha suaveolens (I)
- Mentha × villosa (I)
- Menyanthes trifoliata (N)
- Mercurialis annuaMercurialis annuaMercurialis annua is a species of flowering plant in the spurge family known by the common name annual mercury. It is native to Europe but it is known on many other continents as an introduced species. It grows in many types of habitat, including disturbed areas...
(I) - Mertensia virginica (N)
- Microstegium vimineumMicrostegium vimineumMicrostegium vimineum, commonly known as Japanese stiltgrass or Nepalese browntop, is an annual grass that is common in a wide variety of habitats and is well adapted to low light levels.-Geographic range:...
(I) - Microthlaspi perfoliatum (I)
- Mikania scandens (N)
- Milium effusum var. cisatlanticumMilium effusumMilium effusum L. is a species of grass in the Poaceae family, native to damp forests of the Holarctic Kingdom.-External links:*...
(N) - Mimulus alatus (N)
- Mimulus ringens var. ringensMimulus ringensMimulus ringens is a species of monkeyflower known by the common names Allegheny monkeyflower and square-stemmed monkeyflower....
(N) - Minuartia michauxii var. michauxii (N)
- Minuartia patula (N)
- Mirabilis albida (N)
- Mirabilis hirsuta (N)
- Mirabilis jalapaMirabilis jalapaMirabilis jalapa is the most commonly grown ornamental species of Mirabilis, and is available in a range of colours. Mirabilis in Latin means wonderful and Jalapa is a town in Mexico...
(I) - Mirabilis nyctagineaMirabilis nyctagineaMirabilis nyctaginea is a species of flowering plant in the four o'clock family known by several common names, including wild four o'clock, heartleaf four o'clock, and heartleaf umbrella wort. It is native to the central section of North America, and it occurs elsewhere as an introduced species,...
(N) - Miscanthus sinensisMiscanthus sinensisMiscanthus sinensis Miscanthus sinensis Miscanthus sinensis (Chinese silver grass, Eulalia grass, maiden grass, zebra grass, Susuki grass, porcupine grass; syn. Eulalia japonica Trin., Miscanthus sinensis f. glaber Honda, Miscanthus sinensis var. gracillimus Hitchc., Miscanthus sinensis var....
(I) - Misopates orontium (I)
- Mitchella repensMitchella repensMitchella repens , or Partridge Berry, or Squaw Vine, is the best known plant in the genus Mitchella.It is a creeping prostrate herbaceous woody shrub, occurring in North America and Japan, and belonging to the madder family ....
(N) - Mitella diphyllaMitella diphyllaMitella diphylla is a clump forming, open woodland plant growing from a fibrouse root system. The species is placed in the Saxifragaceae family. It is native to Eastern North America and is a spring blooming plant with lacy, white flowers produced on stems growing from 20 to 50 centimeters tall...
(N) - Moehringia lateriflora (N)
- Moehringia trinerviaMoehringia trinerviaMoehringia trinervia, commonly known as Three-nerved Sandwort, is a herbaceous annual plant of the family Caryophyllaceae....
(I) - Mollugo verticillataMollugo verticillataMollugo verticillata is a rapidly spreading annual plant from tropical America. In eastern North America, it is a common weed growing in disturbed areas. It forms a prostrate circular mat that can quickly climb over nearby plants and obstacles.Carpetweed has narrow, whorled leaves of 3-8 at each...
(N) - Monarda clinopodia (N)
- Monarda didymaMonarda didymaMonarda didyma is an aromatic herb in the family Lamiaceae, native to eastern North America from Maine west to Ohio and south to northern Georgia. Its name is derived from its odor, which is considered similar to that of the bergamot orange...
(N) - Monarda fistulosa ssp. fistulosa var. fistulosaMonarda fistulosaWild bergamot or Bee Balm is a wildflower in the mint family widespread and abundant as a native plant in much of North America. This plant, with showy summer-blooming white flowers, is often used as a honey plant, medicinal plant, and garden ornamental...
(N) - Monarda fistulosa ssp. fistulosa var. mollisMonarda fistulosaWild bergamot or Bee Balm is a wildflower in the mint family widespread and abundant as a native plant in much of North America. This plant, with showy summer-blooming white flowers, is often used as a honey plant, medicinal plant, and garden ornamental...
(N) - Monarda fistulosa ssp. fistulosaMonarda fistulosaWild bergamot or Bee Balm is a wildflower in the mint family widespread and abundant as a native plant in much of North America. This plant, with showy summer-blooming white flowers, is often used as a honey plant, medicinal plant, and garden ornamental...
(N) - Monarda media (N)
- Monarda punctata ssp. punctata var. villicaulisMonarda punctataMonarda punctata is a herbaceous plant in the mint family, Lamiaceae, that is native to the United States and northeastern Mexico. Common names include Spotted Beebalm and Horsemint....
(N) - Monarda punctata ssp. punctataMonarda punctataMonarda punctata is a herbaceous plant in the mint family, Lamiaceae, that is native to the United States and northeastern Mexico. Common names include Spotted Beebalm and Horsemint....
(N) - Moneses unifloraMoneses unifloraMoneses uniflora Gray is a plant of the family of Ericaceae, that is indigenous to moist coniferous forests in temperate regions of the Northern Hemisphere from Spain to Japan and across North America...
(N) - Monolepis nuttallianaMonolepis nuttallianaMonolepis nuttalliana is a species of flowering plant in the amaranth family known by the common name Nuttall's povertyweed. It is native to North America, where it is widespread and common from Alaska to Mexico to New England. It can be found in many types of habitat, including disturbed areas,...
(N) - Monotropa hypopithys (N)
- Monotropa unifloraMonotropa unifloraMonotropa uniflora, also known as the Ghost Plant, Indian Pipe, or Corpse Plant is a herbaceous perennial plant, formerly classified in the family Monotropaceae, but now included within the Ericaceae. It is native to temperate regions of Asia, North America and northern South America, but with...
(N) - Morella pensylvanica (N)
- Morus alba (I)
- Morus nigra (I)
- Morus rubra var. rubra (N)
- Muhlenbergia asperifoliaMuhlenbergia asperifoliaMuhlenbergia asperifolia is a species of grass known by the common name Scratchgrass. It is native to much of North America, including most of southern Canada, most of the continental United States except for the southeastern region, and parts of northern Mexico...
(N) - Muhlenbergia capillaris (N)
- Muhlenbergia × curtisetosa (N)
- Muhlenbergia cuspidata (N)
- Muhlenbergia frondosa (N)
- Muhlenbergia glomerata (N)
- Muhlenbergia mexicanaMuhlenbergia mexicanaMuhlenbergia mexicana, known by the common names Mexican muhly and Wirestem muhly, is a species of grass. It is native to North America, including most of the United States and southern Canada...
(N) - Muhlenbergia schreberi (N)
- Muhlenbergia sobolifera (N)
- Muhlenbergia sylvatica (N)
- Muhlenbergia tenuiflora (N)
- Muscari armeniacumMuscari armeniacumMuscari armeniacum is an bulbous plant of the genus Muscari with basal, simple leaves and short, flowering stems. It is one of a number of species and genera known as Grape Hyacinth, in this case Armenian Grape Hyacinth. The flowers are purple, blue , or white and the plants are usually tall. M...
(I) - Muscari botryoidesMuscari botryoidesMuscari botryoides is a bulbous perennial plant plant of the genus Muscari and one of a number of species and genera known as Grape Hyacinth. It is sometimes grown as an ornamental plant....
(I) - Muscari comosumLeopoldia comosaLeopoldia comosa is a perennial bulbous plant. Usually called the Tassel Hyacinth, it is one of a number of species and genera also known as Grape Hyacinths. It is found in rocky ground and cultivated areas, such as cornfields and vineyards, in south-east Europe to Turkey and Iran, but has...
(I) - Muscari neglectumMuscari neglectumMuscari neglectum is a perennial bulbous plant, one of a number of species and genera known as Grape Hyacinth and in particular Common Grape Hyacinth. It is sometimes grown as an ornamental plant.- Description :...
(I) - Myagrum perfoliatum (I)
- Myosotis arvensisMyosotis arvensisMyosotis arvensis or Field Forget-me-not is a herbaceous annual of the genus Myosotis. The flowers are 2–5 mm large, and clearly pale blue. They stand in small groups dense at each other. The flowering period runs from May to late in the autumn....
(I) - Myosotis discolorMyosotis discolorMyosotis discolor is a species of forget-me-not known by the common name changing forget-me-not. It is native to Europe, and it can also be found throughout eastern and western North America, where it is an introduced species. It grows in many types of habitat, including disturbed areas such as...
(I) - Myosotis laxaMyosotis laxaMyosotis laxa is a species of forget-me-not known by several common names, including tufted forget-me-not, bay forget-me-not, and small-flowered forget-me-not. It has a circumboreal distribution, occurring throughout northern parts of the Northern Hemisphere...
(N) - Myosotis macrosperma (N)
- Myosotis scorpioidesMyosotis scorpioidesMyosotis scorpioides , the Water Forget-me-not or True Forget-me-not, is a herbaceous perennial plant of the genus Myosotis. It is native to Europe and Asia and it can be found elsewhere, including much of North America, as an introduced species and sometimes a noxious weed. It grows in bogs and...
(I) - Myosotis strictaMyosotis strictaMyosotis stricta is a plant species of the genus Myosotis. Commonly known as Blue scorpion grass....
(I) - Myosotis sylvaticaMyosotis sylvaticaMyosotis sylvatica is a herbaceous perennial plant of the genus Myosotis.Myosotis sylvatica is a compact bushy plant with lance-shaped foliage and tiny delicate blue flowers in May and June. It grows in rich, moist soil in part shade to shade. It is appropriate for woodland gardens, groundcover,...
(I) - Myosotis verna (N)
- Myosoton aquaticum (I)
- Myosurus minimusMyosurus minimusMyosurus minimus is a species of flowering plant in the buttercup family known by the common name tiny mousetail. It is native to much of the Northern Hemisphere, including parts of Europe, Asia, North Africa, and North America. It generally grows in moist habitat types, such as riverbanks and wet...
(N) - Myriophyllum aquaticum (I)
- Myriophyllum heterophyllum (N)
- Myriophyllum humile (N)
- Myriophyllum pinnatum (N)
- Myriophyllum sibiricumMyriophyllum sibiricumMyriophyllum sibiricum is a species of water milfoil known by the common name shortspike water milfoil. It is native to Russia, China, and much of North America, where it grows in aquatic habitat such as ponds and streams. It generally grows over a meter long, its green stem drying white. It is...
(N) - Myriophyllum spicatumMyriophyllum spicatumMyriophyllum spicatum is a species of Myriophyllum native to Europe, Asia, and north Africa. It is a submerged aquatic plant, and grows in still or slow-moving water.-Description:...
(I) - Myriophyllum verticillatum (N)
N
- Najas flexilisNajas flexilisNajas flexilis is an aquatic annual plant native to parts of North America and Europe. Its common names include slender naiad and nodding waternymph.The plant inhabits shallow bodies of brackish and fresh water such as lakes and bays...
(N) - Najas gracillima (N)
- Najas guadalupensis ssp. guadalupensisNajas guadalupensisNajas guadalupensis is a species of aquatic plant known by the common name common water nymph. It is native to the Americas, where it is widespread. It is also known on other continents as an introduced species and sometimes a noxious weed. This annual plant grows submerged in aquatic habitat types...
(N) - Najas marinaNajas marinaNajas marina is a species of aquatic plant known by the common names spiny naiad and holly-leaved water nymph. It can be found nearly worldwide in many types of freshwater and brackish aquatic habitat, including bodies of alkaline water. This annual plant produces a slender, branching stem up to 40...
(N) - Najas minor (I)
- Napaea dioica (N)
- Narcissus × incomparabilis (I)
- Narcissus jonquillaNarcissus jonquillaNarcissus jonquilla is an old world daffodil that has naturalized throughout Europe and the United States. It is one of the Narcissus species used in Narcissus Oil, a component of many modern perfumes....
(I) - Narcissus × medioluteus (I)
- Narcissus poeticus (I)
- Narcissus pseudonarcissusNarcissus pseudonarcissusNarcissus pseudonarcissus is a perennial flowering plant which grows from a bulb. It has pale yellow flowers with a darker central trumpet...
(I) - Nasturtium officinale (I)
- Navarretia intertexta ssp. propinquaNavarretia intertextaNavarretia intertexta is a species of flowering plant in the phlox family known by the common name needleleaf pincushionplant.It is native to western North America, including most of the western United States and extending into the Midwest...
(N) - Nelumbo luteaNelumbo luteaNelumbo lutea is a species of flowering plant in the monogeneric family Nelumbonaceae. Common names include American lotus, yellow lotus, water-chinquapin, and volée. It is native to North America...
(N) - Nelumbo nuciferaNelumbo nuciferaNelumbo nucifera, known by a number of names including Indian Lotus, Sacred Lotus, Bean of India, or simply Lotus, is a plant in the monogeneric family Nelumbonaceae...
(I) - Neobeckia aquatica (N)
- Nepeta catariaNepeta catariaNepeta cataria is a plant in the Lamiaceae family. The common names can also be used to refer to the Nepeta genus as a whole.- Cultivation :...
(I) - Neslia paniculataNeslia paniculataNeslia paniculata is a plant species in the genus Neslia....
(I) - Nicandra physalodes (I)
- Nicotiana alata (I)
- Nicotiana glaucaNicotiana glaucaNicotiana glauca is a species of wild tobacco known by the common names tree tobacco and incorrectly also Mustard tree. Its leaves are attached to the stalk by petioles , and its leaves and stems are neither pubescent nor sticky like Nicotiana tabacum...
(I) - Nicotiana rusticaNicotiana rusticaNicotiana rustica, known in South America as Mapacho and in Vietnam as Thuoc Lao , is a plant in the Solanaceae family. It is a very potent variety of tobacco. The high concentration of nicotine in its leaves makes it useful for creating organic pesticides.Rustica is also used for entheogenic...
(I) - Nicotiana tabacumNicotiana tabacumNicotiana tabacum, or cultivated tobacco, is a perennial herbaceous plant. It is found only in cultivation, where it is the most commonly grown of all plants in the Nicotiana genus, and its leaves are commercially grown in many countries to be processed into tobacco. It grows to heights between 1...
(I) - Nigella damascenaNigella damascenaNigella damascena is an annual garden flowering plant, belonging to the buttercup family .It is native to southern Europe , north Africa and southwest Asia. It is also commonly grown in gardens in North America...
(I) - Nothoscordum bivalve (N)
- Nuphar lutea ssp. advenaNuphar luteaNuphar lutea is an aquatic plant of the family Nymphaeaceae, native to temperate regions of Europe, northwest Africa, and western Asia.-Growth:...
(N) - Nuphar lutea ssp. variegataNuphar luteaNuphar lutea is an aquatic plant of the family Nymphaeaceae, native to temperate regions of Europe, northwest Africa, and western Asia.-Growth:...
(N) - Nuttallanthus canadensisNuttallanthus canadensisNuttallanthus canadensis is a species of Nuttallanthus in the Plantaginaceae family, native to eastern North America from Ontario east to Nova Scotia and south to Texas and Florida.It is an annual or biennial plant growing to...
(N) - Nymphaea odorata ssp. odorataNymphaea odorataNymphaea odorata, also known as the Fragrant Water Lily and Beaver Root, is a flower belonging to the genus Nymphaea. It can commonly be found in lake shallows, ponds, and permanent slow moving waters throughout North America where it ranges from Central America to northern Canada...
(N) - Nymphaea odorata ssp. tuberosaNymphaea odorataNymphaea odorata, also known as the Fragrant Water Lily and Beaver Root, is a flower belonging to the genus Nymphaea. It can commonly be found in lake shallows, ponds, and permanent slow moving waters throughout North America where it ranges from Central America to northern Canada...
(N) - Nymphoides peltataNymphoides peltataNymphoides peltata is an aquatic plant of the family Menyanthaceae native to Eurasia. It has cordate floating leaves that support a lax inflorescence of yellow flowers with fringed petal margins...
(I) - Nyssa sylvatica (N)
O
- Obolaria virginica (N)
- Oclemena acuminata (N)
- Oenanthe aquatica (I)
- Oenothera biennisOenothera biennisOenothera biennis is a species of Oenothera native to eastern and central North America, from Newfoundland west to Alberta, southeast to Florida, and southwest to Texas, and widely naturalized elsewhere in temperate and subtropical regions.-Growth and flowering:Oenorthera biennis has a life span...
(N) - Oenothera clelandii (N)
- Oenothera fruticosa ssp. fruticosaOenothera fruticosaOenothera fruticosa, or Narrow-Leaved Sundrops, is an erect herbaceous flowering plant. It is native to much of eastern North America. It grows to about 2-9 decimeters tall, with alternative, simple, entire or slightly toothed leaves. The fruit is a capsule that is strongly 4-angled or winged and...
(N) - Oenothera fruticosa ssp. glaucaOenothera fruticosaOenothera fruticosa, or Narrow-Leaved Sundrops, is an erect herbaceous flowering plant. It is native to much of eastern North America. It grows to about 2-9 decimeters tall, with alternative, simple, entire or slightly toothed leaves. The fruit is a capsule that is strongly 4-angled or winged and...
(N) - Oenothera laciniataOenothera laciniataOenothera laciniata is a species of flowering plant in the evening primrose family known by the common name cutleaf evening primrose. It is native to the eastern United States but it can be found in many other places as an introduced species and sometimes a noxious weed. It is reported from Hawaii,...
(N) - Oenothera nutans (N)
- Oenothera oakesiana (N)
- Oenothera parviflora (N)
- Oenothera perennisOenothera perennisOenothera perennis, or Sundrops, is a herbaceous flowering plant native to the United States and Canada....
(N) - Oenothera pilosella ssp. pilosella (N)
- Oenothera speciosaOenothera speciosaOenothera speciosa is a species of evening primrose known by several common names, including pinkladies, pink evening primrose, showy evening primrose, Mexican primrose, and amapola. It is a herbaceous perennial wildflower native to 28 of the lower 48 U.S...
(N) - Oenothera triloba (N)
- Oenothera villosa ssp. villosa (N)
- Oligoneuron album (N)
- Oligoneuron ohioense (N)
- Oligoneuron riddellii (N)
- Oligoneuron rigidum var. glabratum (N)
- Oligoneuron rigidum var. rigidum (N)
- Onoclea sensibilis (N)
- Onopordum acanthium (I)
- Onosmodium bejariense var. hispidissimum (N)
- Ophioglossum engelmannii (N)
- Ophioglossum pusillumOphioglossum pusillumOphioglossum pusillum is a species of fernlike plant in the family Ophioglossaceae known by the common name northern adder's tongue. It is native to northern North America, where it is widespread in moist areas such as marshes, fens, and meadows. It is a small, inconspicuous, fleshy perennial plant...
(N) - Ophioglossum vulgatumOphioglossum vulgatumOphioglossum vulgatum, commonly known as the Southern adderstongue, is a species of the plant genus Ophioglossum. It is native to temperate regions of the Northern Hemisphere, with a scattered distribution in Europe, Asia, northwestern Africa, and eastern North America.This plant grows from a...
(N) - Opuntia humifusa (N)
- Opuntia macrorhiza var. macrorhiza (N)
- Orbexilum onobrychis (N)
- Orbexilum pedunculatum var. pedunculatum (N)
- Origanum vulgare (I)
- Ornithogalum nutansOrnithogalum nutansOrnithogalum nutans is a species of star of Bethlehem. It is cultivated, and has naturalized, outside its native range, for example in North America. At least in North America, it is not as common as Ornithogalum umbellatum.- Cultivation :...
(I) - Ornithogalum umbellatumOrnithogalum umbellatumOrnithogalum umbellatum , is a perennial bulbous flowering plant, native throughout most of southern and central Europe , and in northwestern Africa and southwestern Asia...
(I) - Orobanche ludoviciana ssp. ludoviciana (N)
- Orobanche unifloraOrobanche unifloraOrobanche uniflora, commonly known as Oneflowered Broomrape, Cancer Root, or Naked Broomrape is an annual parasitic herb...
(N) - Orthilia secunda (N)
- Oryzopsis asperifolia (N)
- Osmorhiza claytoniiOsmorhiza claytoniiOsmorhiza claytonii is a North American perennial herb. It is also known as Sweet Cicely, a name it shares with other members of its genus Osmorhiza....
(N) - Osmorhiza longistylisOsmorhiza longistylisOsmorhiza longistylis is a perennial herb of North America. It is known as aniseroot, longstyle sweetroot, American sweet cicely, licorice root, wild anise, or simply sweet cicely, a name that applies to other members of its genus Osmorhiza generally. It is a medicinal herb that was used by...
(N) - Osmunda cinnamomea var. cinnamomea (N)
- Osmunda claytoniana (N)
- Osmunda regalis var. spectabilisOsmunda spectabilisOsmunda spectabilis is a species of fern once thought to be the same as Osmunda regalis, but recent genetic studies have shown it to be a separate species. -Description:...
(N) - Ostrya virginiana var. virginianaOstrya virginianaOstrya virginiana , is a species of Ostrya native to eastern North America, from Nova Scotia west to southern Manitoba and eastern Wyoming, southeast to northern Florida and southwest to eastern Texas and northeastern Mexico...
(N) - Oxalis corniculata (N)
- Oxalis dillenii (N)
- Oxalis grandis (N)
- Oxalis montana (N)
- Oxalis strictaOxalis strictaOxalis stricta, called the common yellow woodsorrel , common yellow oxalis, upright yellow-sorrel, lemon clover, or more ambiguously and informally "sourgrass" or "pickle plant", is an herbaceous plant native to North America, parts of Eurasia, and has a rare introduction in Britain...
(N) - Oxalis violaceaOxalis violaceaOxalis violacea, the violet woodsorrel, is a perennial plant native to the United States. Similar in appearance to small clovers such as the shamrock, the plant bears violet colored flowers among three-parted leaves having heart-shaped leaflets. Wood sorrel emerges in early spring from an...
(N) - Oxydendrum arboreum (N)
- Oxypolis rigidior (N)
P
- Pachysandra terminalisPachysandra terminalisPachysandra terminalis is a plant in the boxwood family, Buxaceae.-Description:Pachysandra terminalis is a slow growing groundcover with alternate, simple leaves, and creeping stems. The flowers are white, borne in late March and throughout the month of April. It is evergreen but the leaves may...
(I) - Packera anonymaPackera anonymaPackera anonyma is a species of the genus Packera and family Asteraceae....
(N) - Packera aurea (N)
- Packera glabellaPackera glabellaPackera glabella is one of several plants with the common name butterweed, this one has also been called cressleaf groundsel and yellowtop. It is native to central and southeastern North America....
(N) - Packera obovataPackera obovataPackera obovata, a species of Ragwort, is an erect perennial herb native to Eastern North America. The plant was previously called Senecio obovatus....
(N) - Packera pauperculaPackera pauperculaPackera paupercula is a flowering plant species of the genus Packera and family Asteraceae, native to many parts of northern North America and the southeastern United States....
(N) - Packera plattensisPackera plattensisPackera plattensis, also known as prairie ragwort or prairie groundsel is a species of the genus Packera and family Asteraceae. It used to be a Senecio....
(N) - Panax quinquefolius (N)
- Panax trifolius (N)
- Panicum anceps (N)
- Panicum capillarePanicum capillarePanicum capillare, known by the common name Witchgrass, is a species of grass. It is native plant to most of North America from the East Coast through all of the West Coast and California. It can be found as an introduced species in Eurasia, and as a weed in gardens and landscaped areas...
(N) - Panicum dichotomiflorum var. dichotomiflorumPanicum dichotomiflorumPanicum dichotomiflorum, known by the common name Fall panicgrass, is a species of Poaceae "true grass". It is native to much of the eastern United States and parts of Canada, and it can be found in the Western United States through California. It may be an introduced species in some western climates...
(N) - Panicum flexile (N)
- Panicum gattingeri (N)
- Panicum miliaceum ssp. miliaceum (I)
- Panicum philadelphicum (N)
- Panicum rigidulum var. elongatum (N)
- Panicum rigidulum var. pubescens (N)
- Panicum rigidulum var. rigidulum (N)
- Panicum verrucosum (N)
- Panicum virgatum var. virgatum (N)
- Papaver argemonePapaver argemonePapaver argemone is a species of the genus Papaver. Its common names include long pricklyhead poppy and pale poppy. Its native range includes parts of Eurasia and North Africa, and it is cultivated as an ornamental plant...
(I) - Papaver dubium (I)
- Papaver rhoeas (I)
- Papaver somniferum (I)
- Parietaria pensylvanicaParietaria pensylvanicaParietaria pensylvanica is a species of flowering plant in the nettle family known by the common name Pennsylvania pellitory. It is native to much of North America including most of southern Canada, the entire United States, and northern Mexico. It grows in many types of habitat, including...
(N) - Parnassia glauca (N)
- Paronychia canadensis (N)
- Paronychia fastigiata var. fastigiata (N)
- Parthenium hysterophorusParthenium hysterophorusParthenium hysterophorus is a species of flowering plant in the aster family, Asteraceae, that is native to the American tropics. Common names include Santa Maria Feverfew and Whitetop Weed. It is a common invasive species in India, Australia, and parts of Africa. P. hysterophorus invades all...
(I) - Parthenium integrifolium var. integrifolium (N)
- Parthenocissus quinquefoliaParthenocissus quinquefoliaVirginia creeper, five-leaved ivy, or five-finger is a woody vine native to eastern and central North America, in southeastern Canada, the eastern and central United States, eastern Mexico, and Guatemala, west as far as Manitoba, South Dakota, Utah and Texas.-Growth:It is a prolific climber,...
(N) - Parthenocissus tricuspidataParthenocissus tricuspidataParthenocissus tricuspidata is a flowering plant in the grape family native to eastern Asia in Japan, Korea, and northern and eastern China...
(I) - Parthenocissus vitaceaParthenocissus vitaceaParthenocissus vitacea , also known as Thicket Creeper, False Virginia Creeper, Woodbine, or Grape Woodbine, is a woody vine native to North America, in southeastern Canada and a large area of the United States, from Maine west to Montana and south to New Jersey and Missouri in the east, and Texas...
(N) - Pascopyrum smithii (N)
- Paspalum floridanum (N)
- Paspalum fluitans (N)
- Paspalum laeve (N)
- Paspalum pubiflorum (N)
- Paspalum setaceum (N)
- Passiflora incarnataPassiflora incarnataPassiflora incarnata, commonly known as maypop, purple passionflower, true passionflower, wild apricot, and wild passion vine, is a fast growing perennial vine with climbing or trailing stems. A member of the passionflower genus Passiflora, the maypop has large, intricate flowers with prominent...
(N) - Passiflora luteaPassiflora luteaPassiflora lutea is a flowering plant in the family Passifloraceae, native North America, in the eastern and south-central parts of the United States from Pennsylvania west to Kansas, and south to Florida and Texas. It is the northernmost species of Passiflora, occurring slightly further north...
(N) - Pastinaca sativa (I)
- Paulownia tomentosaPaulownia tomentosaPaulownia tomentosa is a deciduous tree in the genus Paulownia, native to central and western China, but invasive in the US...
(I) - Paxistima canbyiPaxistima canbyiPaxistima canbyi is a species of shrub in the bittersweet family known by the common name Canby's Mountain Lover. Canby's mountain-lover is rare throughout its natural range. Canby's mountain-lover is listed as a candidate species for federal listing by the USF&WS....
(N) - Pedicularis canadensis ssp. canadensisPedicularis canadensisPedicularis canadensis is a flowering plant in the Orobanchaceae family and is also known as Wood Betony, Beefsteak Plant, Canadian Lousewort, High Heal-all, Snaffles and Canada Lousewort. It is found in thickets and dry, open wooded areas throughout Canada and the United States. It is a low, hairy...
(N) - Pedicularis lanceolata (N)
- Pellaea atropurpureaPellaea atropurpureaThis is a fern, P. atropurpurea, commonly known as purple-stem cliffbrake or just purple cliffbrake. Brake is an old word for fern, related to the word bracken. Like many other members of the Pteridaceae, it is a rock plant, needing a calcareous substrate.P...
(N) - Pellaea glabella ssp. glabellaPellaea glabellaPellaea glabella is the smooth cliffbrake. For much of pteridological history, it was regarded as a reduced form or variety of Pellaea atropurpurea. P. glabella is known to exist in two cryptic species, one diploid and one tetraploid. The diploid reproduces sexually, while the tetraploid is...
(N) - Peltandra virginicaPeltandra virginicaPeltandra virginica is a plant of the Araceae family known by the common names green arrow arum and tuckahoe. It is native to parts of eastern North America, where it is common in wet areas...
(N) - Pennisetum glaucum (I)
- Penstemon alluviorum (N)
- Penstemon calycosus (N)
- Penstemon canescens (N)
- Penstemon cobaea (N)
- Penstemon digitalisPenstemon digitalisPenstemon digitalis is a plant in the plantain family, Plantaginaceae. The flowers are white, borne in summer. It is native to Eastern and Southeastern United States. Its common name is Beardtongue.-Description:...
(N) - Penstemon grandiflorusPenstemon grandiflorusPenstemon grandiflorus is a perennial plant of the genus Penstemon. Common names include large beardtongue.-External links:**...
(N) - Penstemon hirsutus (N)
- Penstemon laevigatusPenstemon laevigatusPenstemon laevigatus is a plant in the plantain family, Plantaginaceae. The flowers are borne in summer. Its native range includes much of the Eastern United States, from Maine to Michigan and Georgia to Mississippi. It can grow in either sunny or shady conditions....
(N) - Penstemon pallidus (N)
- Penstemon tubiflorus var. tubiflorus (N)
- Penthorum sedoides (N)
- Perideridia americana (N)
- Perilla frutescens var. frutescensPerilla frutescensPerilla frutescens is an edible herb and ornamental plant in the Lamiaceae family. Its common name is perilla; it is also called beefsteak plant, Chinese basil, wild basil, purple mint, rattlesnake weed, or summer coleus.Perilla is a perennial herb and can grow to 3-5 feet tall...
(I) - Petasites hybridus (I)
- Petrorhagia prolifera (I)
- Petrorhagia saxifraga (I)
- Petroselinum crispum (I)
- Petunia × atkinsiana (I)
- Petunia axillaris (I)
- Phacelia bipinnatifida (N)
- Phacelia dubia var. dubia (N)
- Phacelia purshiiPhacelia purshiiMiami Mist is a spring flowering member of the genus Phacelia native to eastern North America. It can be found in the Great Smoky Mountains north into the Great Lakes region.-External links:**...
(N) - Phacelia ranunculacea (N)
- Phalaris arundinacea (N)
- Phalaris canariensis (I)
- Phalaris carolinianaPhalaris carolinianaPhalaris caroliniana is a species of grass known by the common names Carolina canarygrass and maygrass. It is native to the southeastern United States, and it can be found as a naturalized species along the southern half of the United States to the west coast, as well as northern Mexico and parts...
(N) - Phaseolus coccineus (I)
- Phaseolus polystachios var. polystachios (N)
- Phaseolus vulgaris (I)
- Phegopteris connectilisPhegopteris connectilisPhegopteris connectilis, commonly known as Long Beech Fern, is a species of fern native to forests of the Holarctic Kingdom.Unlike its close relative, Phegopteris hexagonoptera, which is terrestrial, this species is often epipetric as well as terrestrial.This species is normally apogamous, with a...
(N) - Phegopteris hexagonopteraPhegopteris hexagonopteraPhegopteris hexagonoptera, commonly called the broad beech fern, is a common forest fern in the eastern United States and adjacent Ontario. It grows from a creeping rootstock, sending up individual fronds that more or less clump....
(N) - Phellodendron amurensePhellodendron amurensePhellodendron amurense Rupr. is a species of tree in the family Rutaceae, commonly called the Amur cork tree. It is a major source of huáng bò , one of the 50 fundamental herbs used in traditional Chinese medicine...
(I) - Philadelphus coronariusPhiladelphus coronariusPhiladelphus coronarius L. is a species of deciduous shrubs in the genus Philadelphus, native to Southern Europe.-Cultivation:...
(I) - Philadelphus inodorus (N)
- Philadelphus pubescens var. pubescens (N)
- Philadelphus tomentosus (I)
- Phleum pratense (I)
- Phlox divaricata ssp. divaricataPhlox divaricataPhlox divaricata is a herbaceous perennial valued for its lavender-blue flowers, native to forests and fields in eastern North America.-Description:...
(N) - Phlox glaberrima ssp. triflora (N)
- Phlox latifolia (N)
- Phlox maculata ssp. maculata (N)
- Phlox maculata ssp. pyramidalis (N)
- Phlox paniculataPhlox paniculataPhlox paniculata is a plant in the phlox family, Polemoniaceae. It is native to eastern United States, but has been extensively cultivated for many years, with many cultivars.-Description:...
(N) - Phlox pilosa ssp. pilosaPhlox pilosaPhlox pilosa is an herbaceous perennial in the family Polemoniaceae. It is native to North America.-Description:...
(N) - Phlox stoloniferaPhlox stoloniferaPhlox stolonifera is a herbaceous perennial plant spreading by stolons, native to woodland in the Appalachian Mountains from Pennsylvania south to northern Georgia....
(N) - Phlox subulata ssp. brittoniiPhlox subulataPhlox subulata is a perennial creeper growing to a height of 6 inches and covering a area. The small, five-petaled flowers bloom in rose, mauve, blue, white, or pink in late spring to early summer...
(N) - Phlox subulata ssp. subulataPhlox subulataPhlox subulata is a perennial creeper growing to a height of 6 inches and covering a area. The small, five-petaled flowers bloom in rose, mauve, blue, white, or pink in late spring to early summer...
(N) - Phoradendron leucarpumPhoradendron leucarpumPhoradendron leucarpum is a species of mistletoe which is native to the United States and Mexico. Its common names include American mistletoe, eastern mistletoe, hairy mistletoe, oak mistletoe, Pacific mistletoe, or western mistletoe....
(N) - Photinia floribunda (N)
- Photinia melanocarpa (N)
- Phragmites australis (N)
- Phryma leptostachya (N)
- Phyla lanceolataPhyla lanceolataPhyla lanceolata is a species of flowering plant in the verbena family known by the common name lanceleaf fogfruit or frogfruit. It is native to the southern half of North America, including much of the United States except for the northwestern quadrant, and much of Mexico...
(N) - Phyllanthus caroliniensis ssp. caroliniensisPhyllanthus caroliniensisPhyllanthus caroliniensis is a flowering plant native to the Americas, from the southeastern United States all the way to Argentina. The flowers are small and located where the leaf meets the stem. It may have medical uses, specifically in reducing pain....
(N) - Physalis alkekengiPhysalis alkekengiPhysalis alkekengi , is a relative of P. peruviana , easily identifiable by the larger, bright orange to red papery covering over its fruit, which resemble Chinese lanterns. It is native from southern Europe east across southern Asia to Japan...
(I) - Physalis grisea (N)
- Physalis heterophylla var. heterophyllaPhysalis heterophyllaPhysalis heterophylla, colloquial name "Clammy Ground Cherry", is a herbaceous plant that is a member of the Solanaceae family. It is native to North America, occurring primarily in the eastern United States and Canada. It is known to occur in all contiguous states except for Nevada and California...
(N) - Physalis hispida (N)
- Physalis longifolia var. longifoliaPhysalis longifoliaPhysalis longifolia is a species of ground cherry. It is a small shrub native to central and eastern United States and in some parts of Canada. It flowers from May to September. Its fruits resemble those of the tomatillo. The fruits must be cooked before they become edible...
(N) - Physalis longifolia var. subglabrataPhysalis longifoliaPhysalis longifolia is a species of ground cherry. It is a small shrub native to central and eastern United States and in some parts of Canada. It flowers from May to September. Its fruits resemble those of the tomatillo. The fruits must be cooked before they become edible...
(N) - Physalis philadelphica var. immaculata (I)
- Physalis pubescens var. integrifoliaPhysalis pubescensPhysalis pubescens is a species of flowering plant in the nightshade family known by many common names, including husk tomato and hairy groundcherry in English, and muyaca and capulí in Spanish. It is native to the Americas, including the southern half of the United States, Mexico, Central and much...
(N) - Physalis pubescens var. pubescensPhysalis pubescensPhysalis pubescens is a species of flowering plant in the nightshade family known by many common names, including husk tomato and hairy groundcherry in English, and muyaca and capulí in Spanish. It is native to the Americas, including the southern half of the United States, Mexico, Central and much...
(N) - Physalis virginiana var. virginiana (N)
- Physocarpus opulifolius var. intermediusPhysocarpus opulifoliusPhysocarpus opulifolius, commonly called common ninebark or Atlantic ninebark, is a plant in the rose family, Rosaceae.-Description:...
(N) - Physocarpus opulifolius var. opulifoliusPhysocarpus opulifoliusPhysocarpus opulifolius, commonly called common ninebark or Atlantic ninebark, is a plant in the rose family, Rosaceae.-Description:...
(N) - Physostegia virginiana ssp. praemorsaPhysostegia virginianaPhysostegia virginiana is a herbaceous perennial plant. Obedient Plant can grow up to 1.2m tall. The flowers are on swivels that can be bent right or left on the stem, giving rise to the common name. The plants bloom in late July to October...
(N) - Physostegia virginiana ssp. virginianaPhysostegia virginianaPhysostegia virginiana is a herbaceous perennial plant. Obedient Plant can grow up to 1.2m tall. The flowers are on swivels that can be bent right or left on the stem, giving rise to the common name. The plants bloom in late July to October...
(N) - Phytolacca americana var. americanaPhytolacca americanaAmerican Pokeweed is a large semi-succulent herbaceous perennial plant growing up to 10 feet in height. It is native to eastern North America, the Midwest, and the Gulf Coast, with more scattered populations in the far West...
(N) - Picea abies (I)
- Picris echioidesPicris echioidesPicris echioides, bristly ox-tongue, is a stiff annual or biennial herb native to Europe and North Africa. It was traditionally used as an antihelminthic treatment .-Description:...
(I) - Picris hieracioidesPicris hieracioidesPicris hieracioides or Hawkweed Oxtongue is a species in the daisy family .- External links :*...
(N) - Picris hieracioides ssp. hieracioidesPicris hieracioidesPicris hieracioides or Hawkweed Oxtongue is a species in the daisy family .- External links :*...
(I) - Pilea fontanaPilea fontanaPilea fontana is an herbaceous plant which is very similar to Pilea pumila . They can be distinguished by the appearance of the mature achenes....
(N) - Pilea pumila var. pumilaPilea pumilaPilea pumila, known as Clearweed, Canadian clearweed, Coolwort, or Richweed is an annual plant native to most of North America east of the Rockies...
(N) - Pimpinella saxifraga ssp. saxifraga (I)
- Pinellia ternataPinellia ternataPinellia ternata , crow-dipper, is a plant native to China, but also grows as an invasive weed in parts of North America. The leaves are trifoliate, while the flowers are of the spathe and spadix form typical of plants in Araceae.-Characteristics:The plant spreads by rhizomes, and there are also...
(I) - Pinus banksiana (N)
- Pinus echinata (N)
- Pinus nigra (I)
- Pinus rigida (N)
- Pinus strobus (N)
- Pinus sylvestris (I)
- Pinus virginiana (N)
- Piptatherum racemosum (N)
- Piptochaetium avenaceum (N)
- Pistia stratiotes (N)
- Pityopsis graminifolia var. latifolia (N)
- Plantago aristataPlantago aristataPlantago aristata is a species of plantain known by the common name largebracted plantain. It is native to the eastern and central United States, and it can be found in other parts of North America as well as parts of Eurasia as an introduced species. It grows in many types of habitat, including...
(N) - Plantago cordata (N)
- Plantago lanceolataPlantago lanceolataPlantago lanceolata is a species of genus Plantago known by the common names ribwort plantain, English plantain, and narrowleaf plantain. It is a common weed of cultivated land....
(I) - Plantago major (I)
- Plantago patagonicaPlantago patagonicaPlantago patagonica is a species of plantain known by the common name woolly plantain. It is native to much of North America, including the southern half of Canada, the western and central United States, and northern Mexico, and parts of southern South America. It grows in many types of habitat,...
(N) - Plantago psyllium (I)
- Plantago rugelii var. rugeliiPlantago rugeliiPlantago rugelii is a 3-12 inch tall perennial in the Plantain family...
(N) - Plantago virginica (N)
- Platanthera × andrewsii (N)
- Platanthera aquilonis (N)
- Platanthera blephariglottis var. blephariglottisPlatanthera blephariglottisPlatanthera blephariglottis, commonly known as the White-fringed Orchid or White-fringed Orchis, is a species of orchid of the genus Platanthera...
(N) - Platanthera ciliarisPlatanthera ciliarisPlatanthera ciliaris, commonly known as the Yellow Fringed Orchid Yellow-fringed Orchis, or Orange-fringed Orchid, is a species of orchid.-External links:*...
(N) - Platanthera clavellata (N)
- Platanthera flava var. herbiola (N)
- Platanthera grandifloraPlatanthera grandifloraPlatanthera grandiflora is a species of orchid occurring from eastern Canada to Wisconsin and the Appalachian Mountains....
(N) - Platanthera hookeri (N)
- Platanthera lacera (N)
- Platanthera leucophaea (N)
- Platanthera orbiculata (N)
- Platanthera peramoena (N)
- Platanthera psycodesPlatanthera psycodesPlatanthera psycodes, commonly called Small Purple Fringed-orchid, is a species of orchid occurring from eastern Canada to the east-central and northeastern United States....
(N) - Platanus occidentalis (N)
- Pleopeltis polypodioides ssp. michauxiana (N)
- Pluchea camphorata (N)
- Poa alsodes (N)
- Poa annuaPoa annuaPoa annua, or annual meadow grass , is a widespread low-growing turfgrass in temperate climates. Though P. annua is commonly considered a solely annual plant due to its name, perennial bio-types do exist. 'Poa' is Greek for fodder. It is one of the sweetest grasses for green fodder, but less ...
(I) - Poa arida (N)
- Poa bulbosaPoa bulbosaPoa bulbosa is a species of grass known by the common name bulbous bluegrass. It is native to Eurasia and North Africa, but it is present practically worldwide as an introduced species. It is widespread in the United States and southern Canada. It was introduced to the eastern United States around...
(I) - Poa chapmaniana (N)
- Poa compressaPoa compressaPoa compressa is a perennial flattened meadow grass, similar to Common Meadow-grass, Poa pratensis. It is native to Europe but it can be found nearly worldwide as an introduced species. It grows in old wall tops, pavement cracks, dry stony grassland, and many types of wild habitat...
(I) - Poa cuspidata (N)
- Poa nemoralisPoa nemoralisPoa nemoralis is a perennial plant in the Poaceae family. The late-growing grass is fairly nutritious for livestock, which feed on it in the autumn....
(N) - Poa nemoralis ssp. nemoralisPoa nemoralisPoa nemoralis is a perennial plant in the Poaceae family. The late-growing grass is fairly nutritious for livestock, which feed on it in the autumn....
(I) - Poa paludigena (N)
- Poa palustrisPoa palustrisPoa palustris is a species of grass native to Asia, Europe and Northern America. This plant is used as fodder and forage, and it also used for erosion control or revegetation.-External links:****...
(N) - Poa pratensis (I)
- Poa pratensis ssp. pratensis (N)
- Poa saltuensis (N)
- Poa sylvestris (N)
- Poa trivialisPoa trivialisPoa trivialis , is a perennial plant, and is regarded in the USA as an ornamental plant and is of the Poa family.-Description:...
(I) - Poa wolfii (N)
- Podophyllum peltatum (N)
- Podostemum ceratophyllum (N)
- Pogonia ophioglossoidesPogonia ophioglossoidesPogonia ophioglossoides is a species of orchid occurring from central Canada to the east-central and eastern United States. It is the type species of the genus Pogonia. It is also known as the "Snake Mouth Orchid"....
(N) - Polanisia dodecandra ssp. dodecandraPolanisia dodecandraPolanisia dodecandra is a species of flowering plant in the Cleome family, Cleomaceae, known by the common name redwhisker clammyweed, or simply clammyweed, although there are other Polanisia species called 'clammyweed'. It is an annual plant that is found in many types of habitat throughout much...
(N) - Polanisia dodecandra ssp. trachyspermaPolanisia dodecandraPolanisia dodecandra is a species of flowering plant in the Cleome family, Cleomaceae, known by the common name redwhisker clammyweed, or simply clammyweed, although there are other Polanisia species called 'clammyweed'. It is an annual plant that is found in many types of habitat throughout much...
(N) - Polanisia jamesii (N)
- Polemonium caeruleumPolemonium caeruleumJacob's Ladder or Greek valerian is a hardy perennial flowering plant. The plant produces cup-shaped, lavender-coloured or white flowers...
(I) - Polemonium reptans var. reptansPolemonium reptansPolemonium reptans is a flowering plant in the genus Polemonium, native to eastern North America. Common names include Abscess Root, Creeping or Spreading Jacob's Ladder, False Jacob's Ladder, American Greek Valerian, Blue bells, Stairway to Heaven, and Sweatroot.-Growth:It is a perennial...
(N) - Polemonium reptans var. villosumPolemonium reptansPolemonium reptans is a flowering plant in the genus Polemonium, native to eastern North America. Common names include Abscess Root, Creeping or Spreading Jacob's Ladder, False Jacob's Ladder, American Greek Valerian, Blue bells, Stairway to Heaven, and Sweatroot.-Growth:It is a perennial...
(N) - Polygala ambigua (N)
- Polygala cruciata var. aquilonia (N)
- Polygala curtissii (N)
- Polygala incarnata (N)
- Polygala paucifoliaPolygala paucifoliaPolygala paucifolia, known as Gaywings or Fringed polygala, is a perennial plant of the family Polygalaceae.Mature plants are 3 to 6 inches tall. Stems are smooth, slender and green. Leaves are clustered at the top, appearing to be whorled, but they are not. Leaflets are oblong to lanceolate —...
(N) - Polygala polygama (N)
- Polygala sanguinea (N)
- Polygala senega (N)
- Polygala verticillata var. isocycla (N)
- Polygala verticillata var. verticillata (N)
- Polygonatum biflorum var. commutatumPolygonatum biflorumPolygonatum biflorum is a species of the family Polygonatum native to eastern North America.-External links:*...
(N) - Polygonatum pubescens (N)
- Polygonum achoreum (N)
- Polygonum amphibium var. emersum (N)
- Polygonum amphibium var. stipulaceum (N)
- Polygonum arenastrumPolygonum arenastrumPolygonum arenastrum is a summer annual weed that is native to Europe and can be found on most continents as an introduced species and a common noxious weed...
(I) - Polygonum arifolium (N)
- Polygonum avicularePolygonum avicularePolygonum aviculare or Common Knotgrass is a plant related to buckwheat and dock. It is also called birdweed, pigweed and lowgrass. It is an annual found in fields and wasteland, with white flowers from June to October....
(I) - Polygonum buxiforme (N)
- Polygonum careyi (N)
- Polygonum cespitosum var. longisetum (I)
- Polygonum cilinode (N)
- Polygonum convolvulus var. convolvulus (I)
- Polygonum cuspidatum (I)
- Polygonum erectumPolygonum erectumPolygonum erectum is an annual plant species with upright or ascending stems. It is a common weed in disturbed locations with dry soils in the North Eastern USA where it is called Erect knotweed.-Description:...
(N) - Polygonum fowleri ssp. fowleri (N)
- Polygonum hydropiper (I)
- Polygonum hydropiperoidesPolygonum hydropiperoidesPolygonum hydropiperoides is a species of flowering plant in the knotweed family known by the common name swamp smartweed. It is native to much of North America where it grows in moist and wet habitats, and is sometimes semi-aquatic....
(N) - Polygonum lapathifolium (N)
- Polygonum orientale (I)
- Polygonum pensylvanicumPolygonum pensylvanicumPolygonum pensylvanicum is a species of flowering plant in the buckwheat family, Polygonaceae, that is native to eastern North America. Common names include Pinkweed, Pink Knotweed, Smartweed, and Pennsylvania Smartweed....
(N) - Polygonum perfoliatum (I)
- Polygonum persicaria (I)
- Polygonum punctatum var. confertiflorum (N)
- Polygonum punctatum var. punctatum (N)
- Polygonum ramosissimum var. ramosissimumPolygonum ramosissimumPolygonum ramosissimum is a herbaceous annual plant species native from most of North America, were it is commonly called Bushy knotweed.-Description:...
(N) - Polygonum robustius (N)
- Polygonum sachalinense (I)
- Polygonum sagittatumPolygonum sagittatumPolygonum sagittatum is a plant in the buckwheat family, Polygonaceae.-Description:Polygonum sagittatum is a herbaceous plant with alternate, simple leaves, on spiny, rambling stems. The flowers are pink or white, borne in late summer through autumn....
(N) - Polygonum scandens var. cristatum (N)
- Polygonum scandens var. dumetorum (N)
- Polygonum scandens var. scandens (N)
- Polygonum scandens var. dumetorum (I)
- Polygonum setaceum (N)
- Polygonum tenue (N)
- Polygonum virginianum (N)
- Polymnia canadensisPolymnia canadensisPolymnia canadensis, commonly known as whiteflower leafcup, is a flowering plant native to eastern North America from Ontario south to Alabama and from Kansas east to Vermont and Connecticut. It is considered endangered in the latter two states....
(N) - Polypodium appalachianumPolypodium appalachianumPolypodium appalachianum is a recently-recognized fern species, native to eastern North America. Sometimes called the Appalachian rockcap fern, it is very similar in appearance to Polypodium virginianum. For years, P...
(N) - Polypodium virginianumPolypodium virginianumPolypodium virginianum, commonly known as Rock Polypody, Rock Cap Fern, or Common Polypody, is a small evergreen species of fern native to the Eastern United States and Canada...
(N) - Polystichum acrostichoides var. acrostichoidesPolystichum acrostichoidesPolystichum acrostichoides is an evergreen fern native to eastern North America from Nova Scotia west to Minnesota and south to Florida and eastern Texas...
(N) - Pontederia cordataPontederia cordataPontederia cordata, commonly known as Pickerelweed, is a monocotyledonous aquatic plant native to North and South America. It can be found on pond and lake margins across an extremely large range from eastern Canada south to Argentina. The species is tristylous, meaning the styles of individual...
(N) - Populus alba (I)
- Populus balsamifera ssp. balsamiferaPopulus balsamiferaPopulus balsamifera, commonly called balsam poplar, bamtree, eastern balsam poplar, hackmatack, tacamahac poplar, tacamahaca,...
(N) - Populus × canadensis (N)
- Populus × canescens (I)
- Populus deltoides ssp. deltoides (N)
- Populus deltoides ssp. monilifera (N)
- Populus grandidentataPopulus grandidentataPopulus grandidentata — the large-tooth, or big-tooth, aspen — is a deciduous tree native to eastern North America.-Name:...
(N) - Populus heterophyllaPopulus heterophyllaPopulus heterophylla, known as the Swamp Cottonwood, also called the River Cottonwood, Downy Poplar, Swamp Poplar, or Black Cottonwood which is actually Populus trichocarpa, is a large deciduous Poplar belonging to section Leucoides of the larger Salindaceae family, found in wet bottom land...
(N) - Populus × jackii (N)
- Populus nigra (I)
- Populus × smithii (N)
- Populus tremuloidesPopulus tremuloidesPopulus tremuloides is a deciduous tree native to cooler areas of North America, commonly called quaking aspen, trembling aspen, American aspen, and Quakies,. The trees have tall trunks, up to 25 metres, with smooth pale bark, scarred with black. The glossy green leaves, dull beneath, become golden...
(N) - Portulaca grandiflora (I)
- Portulaca oleracea (I)
- Portulaca oleracea (N)
- Potamogeton amplifoliusPotamogeton amplifoliusPotamogeton amplifolius, commonly known as largeleaf pondweed or broad-leaved pondweed, is an aquatic plant of North America. It grows in water bodies such as lakes, ponds, and rivers, often in deep water....
(N) - Potamogeton crispus (I)
- Potamogeton diversifoliusPotamogeton diversifoliusPotamogeton diversifolius is a species of aquatic plant known by the common names waterthread pondweed and diverse-leaved pondweed. It is native to most of the United States, as well as sections of southwestern Canada and northern Mexico, where it grows in water bodies such as ponds, lakes,...
(N) - Potamogeton epihydrusPotamogeton epihydrusPotamogeton epihydrus is a species of aquatic plant known by the common name ribbonleaf pondweed. It is native to much of North America, where it grows in water bodies such as ponds, lakes, ditches, and slow-moving streams. This is a perennial herb producing a narrow, compressed stem branching to a...
(N) - Potamogeton foliosus ssp. foliosusPotamogeton foliosusPotamogeton foliosus is a species of aquatic plant known by the common name leafy pondweed. It is native to nearly all of North America and parts of Central America, where it grows in water bodies such as ponds, lakes, ditches, and slow-moving streams. This is a perennial herb growing from a dense,...
(N) - Potamogeton friesii (N)
- Potamogeton gramineusPotamogeton gramineusPotamogeton gramineus is a species of aquatic plant known by the common name variableleaf pondweed. It is native to much of the Northern Hemisphere, where it grows in water bodies such as ponds, lakes, bogs, and streams. It may be found elsewhere as an introduced species. This is a perennial herb...
(N) - Potamogeton × hagstroemii (N)
- Potamogeton hillii (N)
- Potamogeton illinoensis (N)
- Potamogeton natansPotamogeton natansPotamogeton natans L. is an aquatic species in the genus Potamogeton native to quiet or slow-flowing freshwater habitats throughout the Holarctic Kingdom....
(N) - Potamogeton nodosusPotamogeton nodosusPotamogeton nodosus is a species of aquatic plant known by the common name longleaf pondweed. It is native to Eurasia and the Americas, where it is widespread and can be found in water bodies such as ponds, lakes, ditches, and streams. This is a perennial herb producing a thin, branching stem...
(N) - Potamogeton perfoliatusPotamogeton perfoliatusPotamogeton perfoliatus L. is an aquatic species in the genus Potamogeton occurring in both quiet and flowing freshwater or brackish-water habitats in Central and North America, Eurasia, Africa and Australia.-Description:The leaves are all submerged, oval, translucent, with no stalk, up to 8cm...
(N) - Potamogeton praelongusPotamogeton praelongusPotamogeton praelongus, commonly known as White-stem Pondweed, is an aquatic plant with stout, rusty-spotted rhizomes. It is relatively easy to distinguish from other Potamogeton species by the leaves clasping around a zig-zagging stem and persistent, whitish stipules.-External links:*****...
(N) - Potamogeton pulcher (N)
- Potamogeton pusillus ssp. pusillusPotamogeton pusillusPotamogeton pusillus is a species of aquatic plant known by the common name small pondweed. It has a Circumboreal distribution, occurring throughout the northern Northern Hemisphere. It grows in water bodies such as ponds, lakes, ditches, vernal pools, and slow-moving streams...
(N) - Potamogeton pusillus ssp. tenuissimusPotamogeton pusillusPotamogeton pusillus is a species of aquatic plant known by the common name small pondweed. It has a Circumboreal distribution, occurring throughout the northern Northern Hemisphere. It grows in water bodies such as ponds, lakes, ditches, vernal pools, and slow-moving streams...
(N) - Potamogeton × rectifolius (N)
- Potamogeton richardsoniiPotamogeton richardsoniiPotamogeton richardsonii is a species of aquatic plant known by the common name Richardson's pondweed. It is native to much of northern North America, including all of Canada and the northern and western United States. It grows in water bodies such as ponds, lakes, ditches, and streams...
(N) - Potamogeton robbinsiiPotamogeton robbinsiiPotamogeton robbinsii, commonly known as Robbins' Pondweed, is a North American perennial herb.It is found in "deep to shallow, quiet, often muddy waters of lakes, ponds, and rivers."...
(N) - Potamogeton spirillus (N)
- Potamogeton strictifolius (N)
- Potamogeton tennesseensis (N)
- Potamogeton vaseyi (N)
- Potamogeton zosteriformisPotamogeton zosteriformisPotamogeton zosteriformis is a species of aquatic plant known by the common names flatstem pondweed and eel-grass pondweed. It is native to much of northern North America, including most of Canada and the northern United States. It grows in water bodies such as ponds, lakes, and slow-moving streams...
(N) - Potentilla argentea var. argentea (I)
- Potentilla arguta ssp. argutaPotentilla argutaDrymocallis arguta, commonly known as the tall cinquefoil or sticky cinquefoil, is a perennial plant in the Rosaceae family of flowering plants native to North America. It was formerly included with the typical cinquefoils in the genus Potentilla.There are two accepted subspecies:* Drymocallis...
(N) - Potentilla canadensis var. canadensis (N)
- Potentilla canadensis var. villosissima (N)
- Potentilla inclinata (I)
- Potentilla intermedia (I)
- Potentilla norvegica ssp. monspeliensis (N)
- Potentilla paradoxa (N)
- Potentilla pensylvanica var. pensylvanicaPotentilla pensylvanicaPotentilla pensylvanica is a species of cinquefoil known by the common names Pennsylvania cinquefoil and prairie cinquefoil. It is native to much of northern and western North America, including most of Canada and the western half of the United States. It grows in many types of habitat. The plant...
(N) - Potentilla rectaPotentilla rectaPotentilla recta is a species of cinquefoil. It is native to Eurasia but it is present in North America as an introduced species, ranging through almost the entire continent except the northernmost part of Canada and Alaska.The plant probably originated in the Mediterranean Basin, and it was first...
(I) - Potentilla reptans (I)
- Potentilla simplex (N)
- Prenanthes alba (N)
- Prenanthes altissima (N)
- Prenanthes aspera (N)
- Prenanthes crepidinea (N)
- Prenanthes racemosa var. racemosa (N)
- Prenanthes serpentaria (N)
- Prenanthes trifoliolata (N)
- Proboscidea louisianica ssp. louisianica (N)
- Prosartes lanuginosaProsartes lanuginosaProsartes lanuginosa is a member of the lily family with the common name Yellow Mandarin or Fairybells....
(N) - Prosartes maculata (N)
- Proserpinaca palustris var. amblyogona (N)
- Proserpinaca palustris var. crebra (N)
- Prunella laciniataPrunella laciniataFor the species commonly known as large self-heal, see Prunella grandiflora.Prunella laciniata is a plant in the Lamiaceae family....
(I) - Prunella vulgaris ssp. lanceolataPrunella vulgarisPrunella vulgaris, known as common selfheal, heal-all, heart-of-the-earth, is a medicinal plant in the genus Prunella. It grows 5 to 30 cms high , with creeping, self-rooting, tough, square, reddish stems branching at leaf axis...
(N) - Prunus americanaPrunus americanaPrunus americana, commonly called the American Plum, Wild Plum, or Marshall's Large Yellow Sweet Plum, is a species of Prunus native to North America from Saskatchewan to New Mexico east to New Hampshire and Florida. It has often been planted outside its core range and sometimes escapes cultivation...
(N) - Prunus aviumPrunus aviumPrunus avium, commonly called wild cherry, sweet cherry, bird cherry, or gean, is a species of cherry, native to Europe, west Turkey, northwest Africa, and western Asia, from the British Isles south to Morocco and Tunisia, north to the Trondheimsfjord region in Norway and east to the Caucasus, and...
(I) - Prunus cerasifera (I)
- Prunus cerasus (I)
- Prunus domestica var. domesticaPrunus domesticaPrunus domestica is a Prunus species with many varieties. These are often called "plums" in common English, though not all plums belong to this species. Its hybrid parentage is believed to be Prunus spinosa and Prunus cerasifera var. divaricata...
(I) - Prunus hortulana (N)
- Prunus mahalebPrunus mahalebPrunus mahaleb is a species of cherry native to central and southern Europe, western and central Asia, and northwest Africa, from Morocco north to France, southern Belgium, and Germany, and east to northern Pakistan and Kyrgyzstan.It is a deciduous tree or large...
(I) - Prunus mexicanaPrunus mexicanaPrunus mexicana, commonly known as the Mexican Plum, is a species of plum tree that is found in the Midwestern and Southeastern United States as well as Northern Mexico. Its native range stretches from South Dakota and Ohio in the north to as far south as Alabama and Coahuila. Mexican Plum is...
(N) - Prunus munsoniana (N)
- Prunus nigraPrunus nigraPrunus nigra is a species of Prunus, native to eastern North America from New Brunswick west to southeastern Manitoba, and south to Connecticut across to Iowa...
(N) - Prunus pensylvanica var. pensylvanica (N)
- Prunus persica var. persica (I)
- Prunus pumila var. pumilaPrunus pumilaPrunus pumila, commonly called sand cherry, Bessey cherry, dwarf cherry, eastern sand cherry, Great Lakes sand cherry, prostrate dwarf cherry, Rocky Mountain cherry, or western sand cherry, is a species of Prunus native to eastern and central North America, from New Brunswick west to Ontario and...
(N) - Prunus serotina var. serotina (N)
- Prunus subhirtellaPrunus subhirtellaPrunus subhirtella, sometimes also called Spring Cherry, Higan cherry, or Rosebud cherry is a small tree originating in Japan, but unknown in the wild. It is probably of hybrid origin between Prunus incisa and Prunus spachiana....
(I) - Prunus susquehanae (N) (here considered a synonym of P. pumilaPrunus pumilaPrunus pumila, commonly called sand cherry, Bessey cherry, dwarf cherry, eastern sand cherry, Great Lakes sand cherry, prostrate dwarf cherry, Rocky Mountain cherry, or western sand cherry, is a species of Prunus native to eastern and central North America, from New Brunswick west to Ontario and...
) - Prunus tomentosaPrunus tomentosaNanking Cherry is a species of Prunus native to northern and western China , Korea, Mongolia, and possibly northern India...
(I) - Prunus virginiana var. virginiana (N)
- Pseudognaphalium macounii (N)
- Pseudognaphalium obtusifolium ssp. obtusifoliumPseudognaphalium obtusifoliumPseudognaphalium obtusifolium is a member of the Asteraceae family. Annual herb to one meter, stem white-tomentose, involucres long, cream colored or brown, with cream-colored flower heads. Leaves opposite, lance-linear, sesile, tomentose below and olive green above.P...
(N) - Pseudolysimachion longifolium (I)
- Ptelea trifoliata ssp. trifoliata var. trifoliata (N)
- Ptelea trifoliata ssp. trifoliata (N)
- Pteridium aquilinum var. latiusculumPteridium aquilinumPteridium aquilinum is a species of fern occurring in temperate and subtropical regions throughout much of the northern hemisphere....
(N) - Pteridium aquilinum var. pseudocaudatumPteridium aquilinumPteridium aquilinum is a species of fern occurring in temperate and subtropical regions throughout much of the northern hemisphere....
(N) - Puccinellia distansPuccinellia distansPuccinellia distans is a species of grass known by the common names Weeping alkali grass and European alkali grass. It is native to Europe and it is present in most of North America, where it is perhaps an introduced species. It grows in moist habitat, usually in areas with saline soils, such as...
(N) - Puccinellia distans ssp. distansPuccinellia distansPuccinellia distans is a species of grass known by the common names Weeping alkali grass and European alkali grass. It is native to Europe and it is present in most of North America, where it is perhaps an introduced species. It grows in moist habitat, usually in areas with saline soils, such as...
(I) - Pueraria montana var. lobataPueraria montanaPueraria montana is a species of plant in the botanical family Fabaceae. At least three sub-species are known. It is closely related to other species in the genus Pueraria and the common name kudzu is used for all of these species and hybrids between them...
(I) - Pycnanthemum incanum var. incanumPycnanthemum incanumPycnanthemum incanum is a herbaceous perennial in the mint family, native to North America. It is listed as an endangered species in Vermont and New Hampshire, as well as in Ontario, where there are only two remaining populations located within a single stretch of oak savanna in Burlington...
(N) - Pycnanthemum incanum var. puberulumPycnanthemum incanumPycnanthemum incanum is a herbaceous perennial in the mint family, native to North America. It is listed as an endangered species in Vermont and New Hampshire, as well as in Ontario, where there are only two remaining populations located within a single stretch of oak savanna in Burlington...
(N) - Pycnanthemum muticum (N)
- Pycnanthemum pycnanthemoides var. pycnanthemoides (N)
- Pycnanthemum tenuifoliumPycnanthemum tenuifoliumPycnanthemum tenuifolium is a plant in the mint family, Lamiaceae.Many authors believed that the name Pycnanthemum flexuosum refers to this plant, but this does not appear to be correct....
(N) - Pycnanthemum verticillatum var. pilosum (N)
- Pycnanthemum verticillatum var. verticillatum (N)
- Pycnanthemum virginianumPycnanthemum virginianumPycnanthemum virginianum is a plant in the mint family, Lamiaceae. It is a herbaceous plant with narrow, opposite, simple leaves, on wiry, green stems. The flowers are white with purplish spotting, borne in summer. Like most plants in the genus, the foliage has a strong mint fragrance when crushed...
(N) - Pyracantha coccineaPyracantha coccineaPyracantha coccinea is the European species of Firethorn that has been cultivated in gardens since the late 16th century. The tree has small white flowers. It produces small, bright red berries. The fruit is bitter and astringent, making it inedible when raw. The fruit can be cooked to make...
(I) - Pyracantha coccineaPyracantha coccineaPyracantha coccinea is the European species of Firethorn that has been cultivated in gardens since the late 16th century. The tree has small white flowers. It produces small, bright red berries. The fruit is bitter and astringent, making it inedible when raw. The fruit can be cooked to make...
(N) - Pyrola americana (N)
- Pyrola asarifolia ssp. asarifoliaPyrola asarifoliaPyrola asarifolia, commonly known as Bog Wintergreen, Liverleaf Wintergreen or Pink Wintergreen, is a plant species of the genus Pyrola native to western North America. It is found primarily on forest margins at mid latitude in the Pacific Northwest and northern California...
(N) - Pyrola chloranthaPyrola chloranthaPyrola chlorantha or Green-Flowered Wintergreen is a species of the plant genus Pyrola. It has a Circumboreal distribution and is found throughout the northern latitudes of Eurasia and North America....
(N) - Pyrola elliptica (N)
- Pyrus calleryana (I)
- Pyrus communis (I)
Q
- Quercus alba (N)
- Quercus × bebbiana (N)
- Quercus bicolor (N)
- Quercus × bushii (N)
- Quercus coccinea var. coccinea (N)
- Quercus coccinea var. tuberculata (N)
- Quercus × deamii (N)
- Quercus ellipsoidalis (N)
- Quercus × exacta (N)
- Quercus falcata (N)
- Quercus × fontana (N)
- Quercus × hawkinsiae (N)
- Quercus imbricaria (N)
- Quercus × jackiana (N)
- Quercus × leana (N)
- Quercus macrocarpa var. macrocarpa (N)
- Quercus marilandica var. marilandica (N)
- Quercus muehlenbergii (N)
- Quercus × mutabilis (N)
- Quercus × palaeolithicola (N)
- Quercus palustris (N)
- Quercus prinus (N)
- Quercus robur (I)
- Quercus rubra var. ambigua (N)
- Quercus rubra var. rubra (N)
- Quercus × runcinata (N)
- Quercus × saulii (N)
- Quercus × schuettei (N)
- Quercus shumardii var. schneckii (N)
- Quercus shumardii var. shumardii (N)
- Quercus stellata (N)
- Quercus × tridentata (N)
- Quercus velutina (N)
R
- Ranunculus abortivus (N)
- Ranunculus acris var. acris (N)
- Ranunculus acris var. acris (I)
- Ranunculus allegheniensis (N)
- Ranunculus ambigens (N)
- Ranunculus arvensisRanunculus arvensisRanunculus arvensis is a plant species of the genus Ranunculus. It is native to Europe, but it can be found on other continents as an introduced species and sometimes a weed, including in North America and Australia. It was formerly a common annual arable weed in Britain, but is now rare there...
(I) - Ranunculus bulbosus (I)
- Ranunculus fascicularis (N)
- Ranunculus ficaria var. bulbifera (I)
- Ranunculus flabellarisRanunculus flabellarisfvRanunculus flabellaris is a plant, a species of buttercup known by the common name yellow water buttercup. It is native to much of North America, including the southern half of Canada and most of the United States. It is aquatic or semi-aquatic, growing in water or in or near muddy areas in many...
(N) - Ranunculus hispidus var. caricetorum (N)
- Ranunculus hispidus var. hispidus (N)
- Ranunculus hispidus var. nitidus (N)
- Ranunculus longirostrisRanunculus longirostrisRanunculus longirostris is a plant species of the genus Ranunculus.-External links:*...
(N) - Ranunculus micranthus (N)
- Ranunculus parviflorusRanunculus parviflorusRanunculus parviflorus is a species of buttercup known by the common name smallflower buttercup. It is native to Europe, but it is known on other areas of the world as an introduced species and sometimes a roadside weed, for example, in parts of Australia and the United States. It is an annual herb...
(I) - Ranunculus pensylvanicus (N)
- Ranunculus pusillus var. pusillusRanunculus pusillusRanunculus pusillus is a species of flowering plant in the buttercup genus known by the common name low spearwort. It is native to much of the eastern United States from New York to Florida and west to Texas; it is also known in California. It grows in wet habitat, where it is semi-aquatic growing...
(N) - Ranunculus recurvatus var. recurvatusRanunculus recurvatusRanunculus recurvatus is a plant species of the genus Ranunculus in the family Ranunculaceae native to eastern North America. It is an early-flowering plant of moist deciduous woods from central Quebec south to Florida....
(N) - Ranunculus repens (I)
- Ranunculus sceleratus var. sceleratusRanunculus sceleratusRanunculus sceleratus is a species of buttercup known by the common names cursed buttercup and celery-leaved buttercup. It is native to North America and Eurasia, where it grows in wet and moist habitat, including ponds and streambanks. It is an annual herb growing up to half a meter tall...
(N) - Raphanus raphanistrum (I)
- Raphanus sativus (I)
- Ratibida columniferaRatibida columniferaRatibida columnifera, commonly known as Upright Prairie Coneflower or Mexican Hat, is a species of flowering plant in the daisy family, Asteraceae, that is native to much of North America....
(N) - Ratibida pinnata (N)
- Reseda albaReseda albaReseda alba is a species of flowering plant in the reseda family known by the common name white mignonette, or white upright mignonette. It is native to Europe, Asia, and North Africa, and it can be found in parts of the Americas and Australia as an introduced species. It is also cultivated as an...
(I) - Reseda luteaReseda luteaReseda lutea or Wild Mignonette is a species of fragrant herbaceous plant. Its roots have been used to make a yellow dye called "weld" since the first millennium BC, although the related plant Reseda luteola was more widely used for that purpose.A native of Eurasia and North Africa, the plant is...
(I) - Reseda luteolaReseda luteolaReseda luteola is a plant species in the genus Reseda. Common names include dyer's rocket, dyer's weed, weld, woold, and yellow weed...
(I) - Rhamnus alnifoliaRhamnus alnifoliaRhamnus alnifolia is a species of flowering plant in the buckthorn family known by the common name alder buckthorn, or alderleaf buckthorn. It is native to North America, where it is known mainly from the southern half of Canada and the northern half of the United States and California...
(N) - Rhamnus catharticaRhamnus catharticaRhamnus cathartica , is a species in the family Rhamnaceae, native to Europe, northwest Africa, and western Asia, from the central British Isles south to Morocco, and east to Kyrgyzstan...
(I) - Rhamnus davurica ssp. davurica (I)
- Rhamnus lanceolata ssp. glabrata (N)
- Rhamnus lanceolata ssp. lanceolata (N)
- Rhamnus utilis (I)
- Rheum rhabarbarum (I)
- Rhexia virginica (N)
- Rhododendron calendulaceumRhododendron calendulaceumRhododendron calendulaceum , is a species of Rhododendron native to the Appalachian Mountains in the eastern United States, ranging from southern New York to northern Georgia....
(N) - Rhododendron maximumRhododendron maximumRhododendron maximum — also called great rhododendron, great laurel, rosebay rhododendron, American rhododendron or big rhododendron — is a species of Rhododendron native to eastern North America, from Nova Scotia south to northern Alabama.-Description:R. maximum is an evergreen shrub growing to 4...
(N) - Rhododendron periclymenoidesRhododendron periclymenoidesRhododendron periclymenoides, is a deciduous shrub native to the eastern United States. Flowers appear before the leaves expand. It ranges from New Hampshire to Georgia and Alabama and are relatively frequent though widely scattered along streams, in deciduous forests and woodlands. The ranges of...
(N) - Rhododendron prinophyllum (N)
- Rhodotypos scandens (I)
- Rhus aromatica var. arenariaRhus aromaticaRhus aromatica is a plant species in the family Anacardiaceae native to Canada and the United States....
(N) - Rhus aromatica var. aromaticaRhus aromaticaRhus aromatica is a plant species in the family Anacardiaceae native to Canada and the United States....
(N) - Rhus copallinum var. latifolia (N)
- Rhus glabraRhus glabraRhus glabra is a species of sumac in the family Anacardiaceae, native to North America, from southern Quebec west to southern British Columbia in Canada, and south to northern Florida and Arizona in the United States and Tamaulipas in northeastern Mexico.One of the easiest shrubs to identify...
(N) - Rhus pulvinata (N)
- Rhus typhinaRhus typhinaThe Staghorn Sumac is a deciduous shrub to small tree in the Anacardiaceae or Cashew family, native to eastern North America...
(N) - Rhynchospora albaRhynchospora albaRhynchospora alba, the white beak-sedge, is a plant in the sedge family, Cyperaceae. It is a tufted herbaceous perennial plant found in fairly acidic wetlands which have few plant nutrients....
(N) - Rhynchospora capillacea (N)
- Rhynchospora capitellataRhynchospora capitellataRhynchospora capitellata is a species of sedge known by the common name brownish beaksedge. It is native to eastern North America and a few spots in the western United States. It grows in wet habitat, such as swamps, springtime meadows, and moist areas in forests...
(N) - Rhynchospora recognita (N)
- Ribes americanum (N)
- Ribes aureum var. villosumRibes aureumRibes aureum Pursh is a species of small to medium-sized deciduous shrubs 2 to 3 meters tall in the genus Ribes...
(N) - Ribes cynosbati (N)
- Ribes glandulosum (N)
- Ribes hirtellum (N)
- Ribes missourienseRibes missourienseRibes missouriense, The Missouri gooseberry or Missouri currant, is a prickly, many-stemmed shrub native to the U.S. State of Missouri and to adjoining parts of Kansas and Arkansas...
(N) - Ribes nigrum (I)
- Ribes oxyacanthoides ssp. oxyacanthoides (N)
- Ribes rotundifolium (N)
- Ribes rubrum (I)
- Ribes triste (N)
- Ribes uva-crispa var. sativum (I)
- Ricinus communis (I)
- Robinia × ambigua (N)
- Robinia hispida var. fertilis (N)
- Robinia hispida var. hispida (N)
- Robinia pseudoacacia (N)
- Robinia viscosa var. viscosa (N)
- Rorippa palustris ssp. fernaldianaRorippa palustrisRorippa palustris is a species of flowering plant in the mustard family known by the common names bog yellowcress and marsh cress. It is native to many parts of Europe, Asia, North Africa, and North America, and it can be found in many other parts of the world as an introduced species and a common...
(N) - Rorippa palustris ssp. hispidaRorippa palustrisRorippa palustris is a species of flowering plant in the mustard family known by the common names bog yellowcress and marsh cress. It is native to many parts of Europe, Asia, North Africa, and North America, and it can be found in many other parts of the world as an introduced species and a common...
(N) - Rorippa sessiliflora (N)
- Rorippa sylvestrisRorippa sylvestrisRorippa sylvestris is an invasive species ) in the United States....
(I) - Rosa arkansana var. suffulta (N)
- Rosa blanda var. blanda (N)
- Rosa canina (I)
- Rosa carolina var. carolinaRosa carolinaRosa carolina, commonly known as the Carolina rose, pasture rose, or low rose, is a shrub in the rose family native to eastern North America, where it can be found in nearly all US states and Canadian provinces east of the Great Plains....
(N) - Rosa centifoliaRosa centifoliaRosa × centifolia , the provence rose or cabbage rose or Rose de Mai is a hybrid rose developed by Dutch rose breeders in the period between the 17th century and the 19th century, possibly earlier...
(I) - Rosa cinnamomea (I)
- Rosa eglanteria (I)
- Rosa gallicaRosa gallicaRosa gallica is a species of rose native to southern and central Europe eastwards to Turkey and the Caucasus....
(I) - Rosa majalisRosa majalisRosa majalis J. Herrm. is a species of deciduous shrubs in the genus Rosa, native to forests of Europe and Siberia. It grows to 2 m...
(I) - Rosa micrantha (I)
- Rosa multiflora (I)
- Rosa nitidaRosa nitidaRosa nitida, also known as the shining rose due to its glossy leaves , is a species in the plant genus Rosa in the plant family Rosaceae. It is native to northeastern North America, from Connecticut north to Newfoundland and Quebec. It forms a low, suckering, deciduous shrub, growing up to a metre...
(N) - Rosa × palustriformis (N)
- Rosa palustrisRosa palustrisRosa palustris is a shrub in the rose family native to much of eastern North America. It can be found from Nova Scotia and New Brunswick in the north, south to Florida and west to Arkansas and Ontario.-Description:...
(N) - Rosa pimpinellifoliaRosa pimpinellifoliaRosa pimpinellifolia is a species of rose native to western, central and southern Europe and northwest Africa...
(I) - Rosa × rudiuscula (N)
- Rosa rugosa (I)
- Rosa setigera var. setigera (N)
- Rosa setigera var. tomentosa (N)
- Rosa wichuraiana (I)
- Rotala ramosiorRotala ramosiorRotala ramosior is a species of flowering plant in the loosestrife family known by the common name lowland rotala. This aquatic or semi-aquatic plant is native to North America, where it grows in water bodies such as lakes, streams, and irrigation ditches. The branching stems of the plant grow up...
(N) - Rubus aboriginum (N)
- Rubus allegheniensis var. allegheniensis (N)
- Rubus allegheniensis var. gravesii (N)
- Rubus alumnus (N)
- Rubus argutus (N)
- Rubus armeniacusRubus armeniacusRubus armeniacus, Armenian Blackberry or Himalayan Blackberry, is a species of Rubus in the blackberry group Rubus subgenus Rubus series Discolores Focke. It is native to Armenia in southwest Asia, and widely naturalised elsewhere...
(I) - Rubus baileyanus (N)
- Rubus bellobatus (N)
- Rubus canadensis (N)
- Rubus deamii (N)
- Rubus depavitus (N)
- Rubus fecundus (N)
- Rubus flagellaris (N)
- Rubus frondosus (N)
- Rubus hispidus (N)
- Rubus idaeus ssp. strigosusRubus idaeusRubus idaeus is a red-fruited species of Rubus native to Europe and northern Asia and commonly cultivated in other temperate regions. A closely related plant in North America, sometimes regarded as the variety Rubus idaeus var...
(N) - Rubus idaeus ssp. idaeusRubus idaeusRubus idaeus is a red-fruited species of Rubus native to Europe and northern Asia and commonly cultivated in other temperate regions. A closely related plant in North America, sometimes regarded as the variety Rubus idaeus var...
(I) - Rubus invisus (N)
- Rubus laciniatusRubus laciniatusRubus laciniatus, the Cutleaf Evergreen Blackberry or Evergreen Blackberry, is a species of Rubus native to Europe. it is an introduced species in North America...
(I) - Rubus laudatus (N)
- Rubus meracus (N)
- Rubus michiganensis (N)
- Rubus multifer (N)
- Rubus occidentalisRubus occidentalisRubus occidentalis is a species of Rubus native to eastern North America. Its common name black raspberry is shared with the closely related western American species Rubus leucodermis...
(N) - Rubus odoratus var. odoratusRubus odoratusRubus odoratus is a species of Rubus, native to eastern North America, from Nova Scotia west to Ontario, and south to Georgia and Alabama....
(N) - Rubus pensilvanicusRubus pensilvanicusRubus pensilvanicus, known commonly as Pennsylvania Blackberry, is a prickly bramble native to eastern North America. The canes are green at first but then turning dark red, usually ridged, with copious straight prickles. The leaves are compound, usually bearing 5 or 7 leaflets. The flowers are...
(N) - Rubus pergratus (N)
- Rubus philadelphicus (N)
- Rubus phoenicolasiusRubus phoenicolasiusRubus phoenicolasius is a species of raspberry native to northern China, Japan, and Korea. The species was introduced to Europe and North America as an ornamental plant and for its potential in breeding hybrid raspberries...
(I) - Rubus plicatifolius (N)
- Rubus prestonensis (N)
- Rubus pubescens var. pubescensRubus pubescensRubus pubescens is a herbaceous perennial native to the northern United States and Canada. Rubus chloocladus is native to Europe.-Description:...
(N) - Rubus recurvans (N)
- Rubus recurvicaulis (N)
- Rubus roribaccus (N)
- Rubus rosa (N)
- Rubus setosus (N)
- Rubus suus (N)
- Rubus trivialis (N)
- Rubus uvidus (N)
- Rubus vagus (N)
- Rudbeckia fulgida var. deamiiRudbeckia fulgidaRudbeckia fulgida Orange Coneflower, is a perennial plant native to eastern North America.- Description :Rudbeckia fulgida are perennial herbaceous plants growing up to 120 cm tall, growing from rosettes that develop at the end of stolons.- Growth and reproduction :In the garden, this plant...
(N) - Rudbeckia fulgida var. fulgidaRudbeckia fulgidaRudbeckia fulgida Orange Coneflower, is a perennial plant native to eastern North America.- Description :Rudbeckia fulgida are perennial herbaceous plants growing up to 120 cm tall, growing from rosettes that develop at the end of stolons.- Growth and reproduction :In the garden, this plant...
(N) - Rudbeckia fulgida var. speciosaRudbeckia fulgidaRudbeckia fulgida Orange Coneflower, is a perennial plant native to eastern North America.- Description :Rudbeckia fulgida are perennial herbaceous plants growing up to 120 cm tall, growing from rosettes that develop at the end of stolons.- Growth and reproduction :In the garden, this plant...
(N) - Rudbeckia fulgida var. umbrosaRudbeckia fulgidaRudbeckia fulgida Orange Coneflower, is a perennial plant native to eastern North America.- Description :Rudbeckia fulgida are perennial herbaceous plants growing up to 120 cm tall, growing from rosettes that develop at the end of stolons.- Growth and reproduction :In the garden, this plant...
(N) - Rudbeckia grandiflora var. grandiflora (N)
- Rudbeckia hirta var. hirtaRudbeckia hirtaRudbeckia hirta, the Black-eyed Susan, with the other common names of: Brown-eyed Susan, Brown Betty, Brown Daisy , Gloriosa Daisy, Golden Jerusalem, Poorland Daisy, Yellow Daisy, and Yellow Ox-eye Daisy. It is a flowering plant in the family Asteraceae...
(N) - Rudbeckia hirta var. pulcherrimaRudbeckia hirtaRudbeckia hirta, the Black-eyed Susan, with the other common names of: Brown-eyed Susan, Brown Betty, Brown Daisy , Gloriosa Daisy, Golden Jerusalem, Poorland Daisy, Yellow Daisy, and Yellow Ox-eye Daisy. It is a flowering plant in the family Asteraceae...
(N) - Rudbeckia laciniata var. laciniataRudbeckia laciniataThe Cutleaf, Cutleaf Coneflower, Goldenglow, Green-headed Coneflower, Tall Coneflower or, Thimbleweed is a large perennial forb, native to Eastern North America, most often found in flood plains and moist soils. This plant grows up to 3 meters tall, with slightly glaucous leaves, and composite...
(N) - Rudbeckia triloba var. trilobaRudbeckia trilobaRudbeckia triloba is a plant native to the United States. It is sometimes grown in gardens, but it is usually seen in old fields or along roadsides.Herbaceous biennial to weak perennial. Native to central-eastern United States...
(N) - Ruellia caroliniensis ssp. caroliniensis var. caroliniensisRuellia caroliniensisRuellia caroliniensis is a wild petunia with blue or violet flowers that appear in the spring, summer, and autumn. Its leaves are light green. This species is native to the southeastern United States....
(N) - Ruellia caroliniensis ssp. caroliniensisRuellia caroliniensisRuellia caroliniensis is a wild petunia with blue or violet flowers that appear in the spring, summer, and autumn. Its leaves are light green. This species is native to the southeastern United States....
(N) - Ruellia humilisRuellia humilisRuellia humilis Ruellia humilis Ruellia humilis (Fringeleaf wild petunia, Plains petunia, Fringeleaf Ruellia, Hairy Ruellia, Low Ruellia, Zigzag Ruel; (syn. Ruellia ciliosa Pursh var. longiflora Gray, Ruellia humilis Nutt. var. calvescens Fern., Ruellia humilis Nutt. var. depauperata Tharp &...
(N) - Ruellia strepens (N)
- Rumex acetosa (N)
- Rumex acetosa ssp. acetosa (I)
- Rumex acetosellaRumex acetosellaRumex acetosella is a species of sorrel, also known as Acetosella vulgaris Fourr, bearing the common names sheep's sorrel, red sorrel, sour weed, and field sorrel. The plant and its subspecies are common perennial weeds. It has green arrowhead-shaped leaves and red-tinted deeply ridged stems, and...
(I) - Rumex × acutus (I)
- Rumex × acutus (N)
- Rumex altissimus (N)
- Rumex conglomeratus (I)
- Rumex crispus ssp. crispus (I)
- Rumex maritimusRumex maritimusRumex maritimus is an annual plant species of the genus Rumex.-External links:****...
(N) - Rumex obtusifoliusRumex obtusifoliusRumex obtusifolius, commonly known as Broad-leaved Dock, Bitter Dock, Bluntleaf Dock, Dock Leaf or Butter Dock, is a perennial weed, native to Europe but can now be found in the United States and many other countries around the world....
(I) - Rumex orbiculatus var. borealis (N)
- Rumex orbiculatus var. orbiculatus (N)
- Rumex patientiaRumex patientiaPatience Dock , also known as "garden patience", "herb patience", or "monk's rhubarb", is a herbaceous perennial plant species of the genus Rumex, belonging to the family Polygonaceae. In spring it is often consumed as a leaf vegetable in Eastern Europe, especially in Bulgaria and Serbia...
(I) - Rumex salicifolius var. mexicanusRumex salicifoliusRumex salicifolius is a species of flowering plant in the knotweed family known by the common name willow dock. It is native to much of western North America and it can be found in parts of Europe as an introduced species and a roadside weed...
(N) - Rumex verticillatus (N)
- Ruppia cirrhosaRuppia cirrhosaRuppia cirrhosa is a species of aquatic plant known by the common name spiral ditchgrass. It is native to the Americas and Europe, where it grows in freshwater bodies, such as lakes. It is a thread-thin, grasslike perennial herb which grows from a rhizome anchored in the wet substrate. It produces...
(N)
S
- Sabatia angularisSabatia angularisSabatia angularis is a plant native to the United States.-External links:**...
(N) - Saccharum alopecuroides (N)
- Saccharum ravennaeSaccharum ravennaeSaccharum ravennae, with the common name Ravennagrass and locally known as ekra, is a species of grass in genus the Saccharum, the sugarcane genus...
(I) - Sagina decumbens ssp. decumbensSagina decumbensSagina decumbens is a species of flowering plant in the pink family known by the common names trailing pearlwort and western pearlwort. It is native to several areas of North America, where it can be found in many types of habitat. It is a small annual herb producing a threadlike green or purplish...
(N) - Sagina japonica (I)
- Sagina procumbensSagina procumbensSagina procumbens is a species of flowering plant in the pink family known by the common name birdeye pearlwort. It can be found throughout the Northern Hemisphere and parts of South America. It is a common weed of many environments. It can be found in wild and disturbed habitat, especially moist...
(I) - Sagina procumbensSagina procumbensSagina procumbens is a species of flowering plant in the pink family known by the common name birdeye pearlwort. It can be found throughout the Northern Hemisphere and parts of South America. It is a common weed of many environments. It can be found in wild and disturbed habitat, especially moist...
(N) - Sagittaria australis (N)
- Sagittaria brevirostra (N)
- Sagittaria calycina var. calycina (N)
- Sagittaria cuneataSagittaria cuneataSagittaria cuneata is a species of flowering plant in the water plantain family known by the common name arumleaf arrowhead. Like some other Sagittaria species, it may be called wapato. It is native to much of North America, including most of Canada and the western and northeastern United States...
(N) - Sagittaria graminea var. graminea (N)
- Sagittaria latifolia (N)
- Sagittaria platyphylla (N)
- Sagittaria rigida (N)
- Salicornia depressa (N)
- Salix alba (I)
- Salix amygdaloides (N)
- Salix bebbianaSalix bebbianaSalix bebbiana is a species of Willow that is indigenous to Canada and the northern United States, from Alaska and Yukon south to California and Arizona and north-east to Newfoundland and New England...
(N) - Salix candidaSalix candidaSalix candida, also known as sageleaf willow, is a shrub in the Salicaceae family found in northern United States and Canada. It is .5 to 3.5 m tall.-External links:**...
(N) - Salix caprea (I)
- Salix carolinianaSalix carolinianaSalix caroliniana, commonly known as the coastal plain willow, is a shrub or small tree native to the southeastern United States, Mexico and parts of Central America and the Caribbean. It is an obligate wetland species and grows as an emergent species in the Everglades. In the absence of fire, S....
(N) - Salix cinerea (I)
- Salix discolorSalix discolorSalix discolor is a species of willow native to North America, one of two species commonly called Pussy Willow.It is native to the northern forests and wetlands of Canada and the northeastern contiguous United States .It is a weak-wooded deciduous shrub or...
(N) - Salix × ehrhartiana (I)
- Salix × ehrhartiana (N)
- Salix eriocephala (N)
- Salix fragilis (I)
- Salix × glatfelteri (N)
- Salix humilis var. humilis (N)
- Salix humilis var. tristis (N)
- Salix interior (N)
- Salix lucida ssp. lucidaSalix lucidaSalix lucida is a species of willow native to northern and western North America, occurring in wetland habitats....
(N) - Salix matsudana (I)
- Salix myricoides var. albovestita (N)
- Salix myricoides var. myricoides (N)
- Salix nigra (N)
- Salix pedicellaris (N)
- Salix × pendulina (I)
- Salix pentandra (I)
- Salix petiolaris (N)
- Salix purpurea (I)
- Salix × rubens (I)
- Salix sericeaSalix sericeaSalix sericea, also known as silky willow, is a shrub in the Salicaceae family that grows in swamps and along rivers in eastern United States and Canada...
(N) - Salix serissima (N)
- Salix viminalis (I)
- Salsola collina (I)
- Salsola tragusSalsola tragusKali tragus is a species of flowering plant in the amaranth family known by the common name prickly Russian thistle, or simply Russian thistle. It is perhaps the most common species of tumbleweed, and may be known by this general name...
(I) - Salvia azurea var. grandifloraSalvia azureaSalvia azurea is a herbaceous perennial in the genus Salvia that is native to Central and Eastern North America.-Description:...
(N) - Salvia coccineaSalvia coccineaSalvia coccinea is a herbaceous perennial in the Lamiaceae family that is widespread throughout the Southeastern United States, Mexico, Central America, the Caribbean, and northern South America...
(N) - Salvia farinaceaSalvia FarinaceaSalvia farinacea is a herbaceous perennial native to Mexico and parts of the United States including Texas. Violet-blue spikes rest on a compact plant of typically narrow salvia-like leaves, however, the shiny leaves are what set this species apart from a more most other Salvia, which bear...
(N) - Salvia lyrataSalvia lyrataSalvia lyrata , is a herbaceous perennial in the family Lamiaceae that is native to the United States, from Connecticut west to Missouri, and in the south from Florida east to Texas...
(N) - Salvia officinalis (I)
- Salvia pratensisSalvia pratensisSalvia pratensis is a herbaceous perennial in the family Lamiaceae, native to Europe, western Asia and northern Africa. The specific epithet pratensis refers to its tendency to grow in meadows...
(I) - Salvia reflexaSalvia reflexaSalvia reflexa is a perennial subshrub native to the United States and Mexico and introduced to Argentina, Australia, Canada, South Africa and New Zealand.It reaches 4-28 inches in height with small, opposite, lanceolate to narrowly elliptic leaves up to two inches...
(N) - Salvia splendensSalvia splendensSalvia splendens is a tender herbaceous perennial that is native to Brazil, growing at elevation where it is warm year-round and with high humidity. The native plant, rarely seen in cultivation, reaches tall. Smaller selections are very popular as bedding plants, seen in shopping malls and...
(I) - Salvia × superbaSalvia × superbaSalvia × superba is a widely grown Salvia hybrid. Its origins are unknown, though it first appeared in cultivation, and its parents are believed to include Salvia × sylvestris and Salvia amplexicaulis...
(I) - Salvia × sylvestris (I)
- Sambucus nigraSambucus nigraSambucus nigra is a species complex of elder native to most of Europe.It is most commonly called Elder, Elderberry, Black Elder, European Elder, European Elderberry, European Black Elderberry, Common Elder, or Elder Bush when distinction from other species of Sambucus is needed...
(I) - Sambucus nigra ssp. canadensisSambucus nigraSambucus nigra is a species complex of elder native to most of Europe.It is most commonly called Elder, Elderberry, Black Elder, European Elder, European Elderberry, European Black Elderberry, Common Elder, or Elder Bush when distinction from other species of Sambucus is needed...
(N) - Sambucus racemosa var. racemosaSambucus racemosaSambucus racemosa is a species of elderberry known by the common name Red Elderberry. It is native to Europe, temperate Asia, and north and central North America. It grows in riparian environments, woodlands, and other habitat, generally in moist areas. This often treelike shrub grows 2 to 6 meters...
(N) - Samolus valerandiSamolus valerandiSamolus valerandi is a species of water pimpernel native to a very wide area across Europe, Africa, Asia, Australia, and the Americas. Common names include Thin-Leaf Brookweed, Water Cabbage, and Water Rose.-Cultivation:...
(I) - Samolus valerandi ssp. parviflorusSamolus valerandiSamolus valerandi is a species of water pimpernel native to a very wide area across Europe, Africa, Asia, Australia, and the Americas. Common names include Thin-Leaf Brookweed, Water Cabbage, and Water Rose.-Cultivation:...
(N) - Sanguinaria canadensis (N)
- Sanguisorba canadensisSanguisorba canadensisSanguisorba canadensis, or Canadian burnet, is a perennial in the family Rosaceae native to North America, commonly growing in bogs, swamps, and roadsides from Labrador to Georgia. It grows 4–5 ft. tall, with creamy white flowers that grow in cylindrical spikes...
(N) - Sanguisorba minor ssp. balearica (I)
- Sanicula canadensis var. canadensisSanicula canadensisSanicula canadensis, Black Snakeroot, is a native plant of North America and a member of family Apiaceae. It is biennial or periennial, and spreads primarily by seed. It grows from 1 to 4.5 feet tall, and is found in mesic deciduous woodlands...
(N) - Sanicula canadensis var. grandisSanicula canadensisSanicula canadensis, Black Snakeroot, is a native plant of North America and a member of family Apiaceae. It is biennial or periennial, and spreads primarily by seed. It grows from 1 to 4.5 feet tall, and is found in mesic deciduous woodlands...
(N) - Sanicula marilandicaSanicula marilandicaMaryland black snakeroot is a flowering plant widespread in North America but rare along the Pacific coast of the continent and Texas. Sanicula marilandica is listed as Sensitive in Washington state....
(N) - Sanicula odorata (N)
- Sanicula smallii (N)
- Sanicula trifoliata (N)
- Saponaria officinalis (I)
- Sarracenia purpurea ssp. purpureaSarracenia purpureaSarracenia purpurea, commonly known as the purple pitcher plant, northern pitcher plant, or side-saddle flower, is a carnivorous plant in the family Sarraceniaceae...
(N) - Sassafras albidumSassafras albidumSassafras albidum is a species of Sassafras native to eastern North America, from southern Maine and southern Ontario west to Iowa, and south to central Florida and eastern Texas. It occurs throughout the eastern deciduous forest habitat type, at altitudes of sea level up to 1,500 m...
(N) - Satureja hortensis (I)
- Saururus cernuusSaururus cernuusSaururus cernuus is a medicinal and ornamental plant native to eastern North America. It grows in wet areas or shallow water, and can be up to about a meter tall...
(N) - Saxifraga pensylvanica (N)
- Saxifraga virginiensis var. virginiensisSaxifraga virginiensisSaxifraga virginiensis is a wildflower native to eastern and central North America.It is a herbacious plant, which can reach 30cm tall ....
(N) - Scabiosa columbaria (I)
- Scandix pecten-venerisScandix pecten-venerisScandix pecten-veneris is a plant species in the parsley family. It is native to Eurasia and it is known widely elsewhere as an introduced species and sometimes a weed...
(I) - Schedonorus phoenix (I)
- Schedonorus pratensis (I)
- Scheuchzeria palustris ssp. americana (N)
- Schizachne purpurascens (N)
- Schizachyrium littorale (N)
- Schizachyrium scoparium var. scoparium (N)
- Schoenoplectus acutus var. acutus (N)
- Schoenoplectus fluviatilis (N)
- Schoenoplectus pungens var. pungens (N)
- Schoenoplectus purshianus (N)
- Schoenoplectus saximontanusSchoenoplectus saximontanusSchoenoplectus saximontanus is a species of flowering plant in the sedge family known by the common name Rocky Mountain bulrush. It is native to North America, where it is known from several areas scattered throughout Canada, the United States, and Mexico. It grows in moist and wet habitat or...
(N) - Schoenoplectus smithii (N)
- Schoenoplectus subterminalisSchoenoplectus subterminalisSchoenoplectus subterminalis is a species of flowering plant in the sedge family known by the common names water bulrush and swaying bulrush. It is native to North America, where it is known from many areas across Canada and the United States. It grows in moist and wet habitat, and often grows in...
(N) - Schoenoplectus tabernaemontaniSchoenoplectus tabernaemontaniSchoenoplectus tabernaemontani is a species of flowering plant in the sedge family known by the common names softstem bulrush and great bulrush. It can be found throughout the world, growing in many types of moist and wet habitat, and sometimes in shallow water. It is quite variable in appearance...
(N) - Schoenoplectus torreyi (N)
- Scilla siberica (I)
- Scirpus atrovirens (N)
- Scirpus cyperinusScirpus cyperinusScirpus cyperinus, commonly known as woolgrass, is a herbaceous emergent that is native to the eastern United States and eastern Canada....
(N) - Scirpus expansus (N)
- Scirpus georgianus (N)
- Scirpus hattorianus (N)
- Scirpus pedicellatus (N)
- Scirpus pendulusScirpus pendulusScirpus pendulus is a species of flowering plant in the sedge family known by the common names pendulous bulrush, rufous bulrush, and nodding bulrush. It is native to North America, where it can be found throughout the eastern United States and Canada, through the American midwest, some areas of...
(N) - Scirpus polyphyllus (N)
- Scleranthus annuusScleranthus annuusScleranthus annuus is a species of flowering plant in the pink family known by the common names German knotweed and annual knawel. It is native to Europe, Asia, and North Africa, and it is known throughout the rest of the temperate world as an introduced species and a common weed. It grows in many...
(I) - Scleria oligantha (N)
- Scleria pauciflora var. caroliniana (N)
- Scleria pauciflora var. pauciflora (N)
- Scleria triglomerata (N)
- Scleria verticillata (N)
- Sclerochloa duraSclerochloa duraSclerochloa dura is a species of grass known by the common names common hardgrass and fairground grass. It is native to Eurasia, and it is known in parts of North America and Australia as an introduced species and a common weed of disturbed, high-traffic areas such as parking lots, roadsides, and...
(I) - Sclerochloa duraSclerochloa duraSclerochloa dura is a species of grass known by the common names common hardgrass and fairground grass. It is native to Eurasia, and it is known in parts of North America and Australia as an introduced species and a common weed of disturbed, high-traffic areas such as parking lots, roadsides, and...
(N) - Scrophularia lanceolataScrophularia lanceolataScrophularia lanceolata is a species of flowering plant in the figwort family known by the common name lanceleaf figwort. It is native to North America, where it is known from western and eastern Canada and much of the United States except for the southeastern quadrant. It grows in many types of...
(N) - Scrophularia marilandicaScrophularia marilandicaScrophularia marilandica, also called Late Figwort, Maryland Figwort, Carpenter's Square, or Eastern Figwort, is a flowering plant in the family Scrophulariaceae, native throughout eastern and central North America, where it is found growing in dry woods from Manitoba and Quebec south to Texas and...
(N) - Scutellaria elliptica var. elliptica (N)
- Scutellaria elliptica var. hirsuta (N)
- Scutellaria galericulataScutellaria galericulataCommon Skullcap , also known as Marsh Skullcap or Hooded Skullcap, is a hardy perennial herb native to northern areas of the Northern Hemisphere, including Europe, Asia, and much of North America. It is a member of the mint family...
(N) - Scutellaria incana var. incanaScutellaria incanaScutellaria incana, also Downy Skullcap, is a flowering plant in the family Lamiaceae and is native to North America. It is a perennial and is primarily found in the eastern United States as well as some parts of the Midwest....
(N) - Scutellaria integrifolia (N)
- Scutellaria lateriflora var. laterifloraScutellaria laterifloraScutellaria lateriflora, also known as Blue Skullcap, Hoodwort, Virginian Skullcap, Mad-dog Skullcap is a hardy perennial herb native to North America. It is a member of the mint family. It has an upright habit, growing 60 to 80 centimeters in maximum height. It is a wetland-loving species and...
(N) - Scutellaria nervosa (N)
- Scutellaria ovata ssp. ovataScutellaria ovataScutellaria ovata, commonly known as the heart-leaf skullcap, is a member of the mint family. Its range in the United States is from Minnesota to Florida, and from Kansas to the Atlantic coast, although the plant is listed as threatened in Minnesota and was considered "probably extirpated" from...
(N) - Scutellaria parvula var. missouriensis (N)
- Scutellaria parvula var. parvula (N)
- Scutellaria saxatilis (N)
- Scutellaria serrata (N)
- Secale cereale (I)
- Securigera varia (I)
- Sedum acreSedum acreSedum acre, commonly known as the Goldmoss Stonecrop, Goldmoss Sedum, Biting Stonecrop, Wallpepper, and the picturesque name Welcome home husband though never so drunk, is a perennial plant native to Europe, but also naturalised in North America. This plant grows as a creeping ground cover, often...
(I) - Sedum albumSedum albumSedum album or White stonecrop, is a flowering plant of the genus Sedum in the family Crassulaceae. Sedum album is able to acclimate according to the environment...
(I) - Sedum dendroideumSedum dendroideumSedum dendroideum, commonly known as the Stone Treecrop or the False Hens-and-Chickens, is a shrub-like perennial plant that looks much like its Sempervivum look-alike. Native to Mexico, Sedum dendroideum plant thrives in warm, arid climates, as well as in cooler climates...
(I) - Sedum pulchellum (N)
- Sedum reflexumSedum reflexumSedum reflexum or Sedum rupestre, also known as Reflexed Stonecrop, Blue Stonecrop, Jenny's Stonecrop and Prick-madam, is a species of succulent plant of the genus Sedum, native to Northern, Central, and Southwestern Europe.-Description:The Sedum reflexum plants are typically up to 10 cm high, with...
(I) - Sedum sarmentosum (I)
- Sedum sexangulareSedum sexangulareSedum sexangulare, also known as Tasteless Stonecrop, is a species of succulent plant of the genus Sedum. It is similar to Sedum acre, but has shorter and denser leaves. It gained the name for its characteristic six spirals of leaves....
(I) - Sedum ternatumSedum ternatumSedum ternatum is the most widespread native Sedum species in eastern North America, commonly known as woodland stonecrop. It has white flowers, blooming April to May. This species grows where it can receive unimpeded sunlight year-round, including rocky places. It adapts well to garden use.S...
(N) - Selaginella apodaSelaginella apodaSelaginella apoda, commonly known as meadow spike-moss, is a lycophyte native to much of the eastern United States and parts of northeastern Mexico. It is found primarily in damp soils in habitats such as swamps, wet fields, open woods and along stream banks. A lowland plant, it has only been...
(N) - Selaginella eclipes (N)
- Selaginella rupestrisSelaginella rupestrisSelaginella rupestris is a species of spike-moss occurring in dry rocky places in eastern North America, including one locality in Greenland. It has a wide but sporadic range.-External links:*...
(N) - Senecio sylvaticusSenecio sylvaticusSenecio sylvaticus is a species of flowering plant in the aster family known by the common name woodland ragwort and heath groundsel. It is native to Eurasia, and it can be found in other places, including western and eastern sections of North America, as an introduced species and an occasional...
(I) - Senecio vulgaris (I)
- Senna hebecarpaSenna hebecarpaSenna hebecarpa is an ornamental plant native to North America, specially Canada and the United States....
(N) - Senna marilandicaSenna marilandicaSenna marilandica, or Maryland Wild Senna, is a flowering plant in the United States....
(N) - Sericocarpus asteroides (N)
- Sericocarpus linifolius (N)
- Sesamum orientale (I)
- Setaria faberiSetaria faberiSetaria faberi, the Giant Foxtail, also known as Chinese foxtail, Chinese millet, giant bristlegrass, or nodding foxtail, is an Asian grass. It is a summer annual, with plants emerging from seeds in the spring, and setting seeds in the late summer or fall.Giant foxtails prefer compacted soils,...
(I) - Setaria italica (I)
- Setaria parviflora (N)
- Setaria pumila ssp. pumilaSetaria pumilaSetaria pumila is a species of grass known by many common names, including yellow foxtail, yellow bristlegrass, pigeon grass, and cattail grass. It is native to Europe, but it is known throughout the world as a common weed. It grows in lawns, sidewalks, roadsides, cultivated fields, and many other...
(I) - Setaria verticillataSetaria verticillataSetaria verticillata is a species of grass known by the common names Bristly foxtail and hooked bristlegrass. It is native to Europe, but it is known on most continents as an introduced species and often a noxious weed. It is a hardy bunchgrass which grows in many types of urban, cultivated, and...
(I) - Setaria viridis var. viridisSetaria viridisSetaria viridis is a species of grass known by many common names, including green foxtail and green bristlegrass. It is native to Eurasia, but it is known on most continents as an introduced species and is closely related to Setaria faberi, a noxious weed...
(I) - Shepherdia canadensis (N)
- Sherardia arvensis (I)
- Sibara virginicaSibara virginicaSibara virginica is a species of flowering plant in the mustard family known by the common name Virginia winged rockcress. It is native to North America, where it can be found throughout the southeastern quadrant of the United States and in California and Baja California in the west. It grows in...
(N) - Sicyos angulatusSicyos angulatusSicyos angulatus , the burr cucumber or star-cucumber is an annual vine in the cucumber family native to eastern North America....
(N) - Sida hermaphrodita (N)
- Sida spinosa (N)
- Silene antirrhinaSilene antirrhinaSilene antirrhina is a species of flowering plant in the pink family known by the common name sleepy catchfly. It is native to the Americas, where it is widespread throughout North America and parts of South America. It is known in Europe as an introduced species. It can be found in a wide range of...
(N) - Silene armeria (I)
- Silene caroliniana ssp. pensylvanicaSilene carolinianaSilene caroliniana, or Wild Pink, is a flowering plant located in the United States....
(N) - Silene caroliniana ssp. wherryiSilene carolinianaSilene caroliniana, or Wild Pink, is a flowering plant located in the United States....
(N) - Silene conica (I)
- Silene csereii (I)
- Silene dichotomaSilene dichotomaSilene dichotoma is a species of flowering plant in the pink family known by the common name forked catchfly. It is native to Eurasia and it is known in other parts of the temperate world, such as sections of North America, where it is a weed that grows in disturbed habitat. It is an annual herb...
(I) - Silene dioica (I)
- Silene latifolia ssp. alba (I)
- Silene nivea (N)
- Silene noctifloraSilene noctifloraSilene noctiflora is a species of flowering plant in the pink family known by the common name night-flowering catchfly. It is native to Eurasia, but it is known on other continents as an introduced species and sometimes a weed. In North America, it is a common weed of grain crops in the Canadian...
(I) - Silene nutans (I)
- Silene regia (N)
- Silene rotundifolia (N)
- Silene stellataSilene stellataSilene stellata, or Starry Campion, is a flowering plant in the United States....
(N) - Silene virginica var. virginicaSilene virginicaFire Pink is a wildflower in the pink family, Caryophyllaceae. It is known for its distinct brilliant red flowers. Each flower is approximately five centimeters in diameter and composed of five notched, brilliant red petals which extend into a long tube. It is a small , short-lived perennial ,...
(N) - Silene vulgarisSilene vulgarisSilene vulgaris, Silene cucubalus or Bladder Campion is a plant species of the genus Silene of the Pink Family . It is native to Europe, where in some parts it is eaten, but is widespread in North America where it is considered a weed..-Gastronomy:In Spain, the young shoots and the leaves are used...
(I) - Silphium laciniatum var. laciniatumSilphium laciniatumSilphium laciniatum is a species of flowering plant in the genus Silphium...
(N) - Silphium perfoliatum var. perfoliatumSilphium perfoliatumSilphium perfoliatum is a herbaceous perennial flowering plant in Asteraceae, the aster family, it is native from Eastern and Central North America. It grows in prairies, open woodlands, and on stream banks....
(N) - Silphium terebinthinaceum var. luciae-brauniae (N)
- Silphium terebinthinaceum var. terebinthinaceum (N)
- Silphium trifoliatum var. latifolium (N)
- Silphium trifoliatum var. trifoliatum (N)
- Silybum marianum (I)
- Sinapis alba (I)
- Sinapis arvensis ssp. arvensisSinapis arvensisSinapis arvensis is an annual or winter annual plant of the genus Sinapis, belonging to the family Brassicaceae. It is commonly known as Field mustard, Wild mustard or charlock.-Etymology:...
(I) - Sisymbrium altissimumSisymbrium altissimumSisymbrium altissimum is a species of Sisymbrium. The plant is native to the western part of the Mediterranean Basin in Europe and Northern Africa and is widely naturalized throughout most of the world, including all of North America. It was probably introduced into North America by a contaminant...
(I) - Sisymbrium irio (I)
- Sisymbrium loeseliiSisymbrium loeseliiSisymbrium loeselii is a species of flowering plant in the mustard family known by several common names, including small tumbleweed mustard, tall hedge mustard, and false London rocket. It is native to Eurasia, and it is known on other continents as an introduced species and in some areas a common...
(I) - Sisymbrium officinale (I)
- Sisyrinchium albidum (N)
- Sisyrinchium angustifoliumSisyrinchium angustifoliumSisyrinchium angustifolium, commonly known as Stout blue-eyed grass or simply blue-eyed grass, is a herbaceous perennial growing from rhizomes, native to moist meadow and open woodland. It is the most common blue-eyed grass of the eastern United States.Height: . Stem: broadly winged, wide. Leaves:...
(N) - Sisyrinchium atlanticum (N)
- Sisyrinchium montanum var. crebrumSisyrinchium montanumSisyrinchium montanum, or strict blue-eyed grass, is a grass-like species of plants from the genus Sisyrinchium native to northern North America from Newfoundland west to easternmost Alaska, and south to Pennsylvania in the east, and to New Mexico in the Rocky Mountains.It is very similar to S...
(N) - Sisyrinchium mucronatum (N)
- Sium suaveSium suaveSium suave , the Water Parsnip, is a herb belonging to the parsnip family and comes from Africa and some parts of the Northern Hemisphere.- Appearance :...
(N) - Smallanthus uvedalius (N)
- Smilax ecirrhata (N)
- Smilax glaucaSmilax glaucaSmilax glauca is a woody vine in the family Smilacaceae, native to central and eastern portions of the United States. Thorny stems climb by means of tendrils. Leaves are notably gray-glaucous to whitish beneath. Commonly inhabiting wooded areas and fences and often found growing with other...
(N) - Smilax herbaceaSmilax herbaceaSmilax herbacea is a plant in the catbrier family, Smilacaceae.-Description:...
(N) - Smilax illinoensis (N)
- Smilax lasioneura (N)
- Smilax pulverulenta (N)
- Smilax rotundifolia (N)
- Smilax tamnoides (N)
- Solanum carolinense var. carolinense (N)
- Solanum dulcamara var. dulcamaraSolanum dulcamaraSolanum dulcamara, also known as bittersweet, bittersweet nightshade, bitter nightshade, blue bindweed, Amara Dulcis, climbing nightshade, fellenwort, felonwood, poisonberry, poisonflower, scarlet berry, snakeberry, trailing bittersweet, trailing nightshade, violet bloom, or woody...
(I) - Solanum lycopersicum var. lycopersicum (I)
- Solanum physalifolium (I)
- Solanum ptycanthumSolanum ptycanthumSolanum ptychanthum, eastern black nightshade or West Indian nightshade, is an annual or occasionally a perennial in the Solanaceae or Nightshade Family. The is 15-60 cm tall, and is much branched....
(N) - Solanum rostratumSolanum rostratumSolanum rostratum is a species of nightshade that is native to the United States and northern and central Mexico. Common names include buffalo bur, spiny nightshade, and Texas thistle....
(N) - Solanum triflorumSolanum triflorumSolanum triflorum is a species of nightshade known by the common name cutleaf nightshade and small nightshade. It is native to Argentina, but it is known on other continents, including Europe and Australia, as an introduced species and sometimes a weed. It is present throughout much of North...
(N) - Solanum tuberosum (I)
- Solidago altissimaSolidago altissimaSolidago altissima, late goldenrod, is a species of goldenrod native to much of North America. It is common in much of its range, and fairly tolerant of landscapes which have been disturbed by humans. It has been introduced to many parts of the world.-Description:S. altissima is one to two meters...
(N) - Solidago arguta var. arguta (N)
- Solidago bicolor (N)
- Solidago caesiaSolidago caesiaSolidago caesia, or Blue-Stemmed Goldenrod, is a flowering plant in the United States....
(N) - Solidago canadensis var. canadensisSolidago canadensisSolidago canadensis is an herbaceous perennial plant of the family Asteraceae native to North America. It is often grown as a wildflower....
(N) - Solidago canadensis var. gilvocanescensSolidago canadensisSolidago canadensis is an herbaceous perennial plant of the family Asteraceae native to North America. It is often grown as a wildflower....
(N) - Solidago canadensis var. hargeriSolidago canadensisSolidago canadensis is an herbaceous perennial plant of the family Asteraceae native to North America. It is often grown as a wildflower....
(N) - Solidago erecta (N)
- Solidago flexicaulisSolidago flexicaulisSolidago flexicaulis is an herbaceous perennial plant of the family Asteraceae native to the United States. It is often grown as a wildflower.-External links:***...
(N) - Solidago giganteaSolidago giganteaSolidago gigantea is a plant species in the genus Solidago. Its common name is giant goldenrod.It is the state flower of Kentucky and Nebraska.-External links:****...
(N) - Solidago hispida var. hispida (N)
- Solidago junceaSolidago junceaSolidago juncea is an herbaceous perennial plant of the family Asteraceae native to Canada and the United States. It is often grown as a wildflower.-External links:**...
(N) - Solidago nemoralis var. nemoralisSolidago nemoralisSolidago nemoralis, or Gray Goldenrod, is a flowering plant in the United States....
(N) - Solidago odora var. odora (N)
- Solidago patula var. patulaSolidago patulaSolidago patula is a species of goldenrod found in wetlands, especially swamps, fens & sedge meadows. It is native to most of the eastern United States, as far west as Wisconsin and Texas. There are two subspecies....
(N) - Solidago puberula var. puberula (N)
- Solidago rugosa ssp. asperaSolidago rugosaSolidago rugosa, or Wrinkle Leaf Goldenrod, is a flowering plant in the United States....
(N) - Solidago rugosa ssp. rugosa var. rugosaSolidago rugosaSolidago rugosa, or Wrinkle Leaf Goldenrod, is a flowering plant in the United States....
(N) - Solidago rugosa ssp. rugosa var. villosaSolidago rugosaSolidago rugosa, or Wrinkle Leaf Goldenrod, is a flowering plant in the United States....
(N) - Solidago rugosa ssp. rugosaSolidago rugosaSolidago rugosa, or Wrinkle Leaf Goldenrod, is a flowering plant in the United States....
(N) - Solidago rupestris (N)
- Solidago sempervirens var. sempervirensSolidago sempervirensSolidago sempervirens is a plant species in the genus Solidago of the Asteraceae family. It is native to eastern North America and parts of the Caribbean. It is an introduced species in the Great Lakes region and the Azores....
(N) - Solidago speciosa var. rigidiusculaSolidago speciosaSolidago speciosa, or Showy Goldenrod, is a flowering plant in the United States....
(N) - Solidago speciosa var. speciosaSolidago speciosaSolidago speciosa, or Showy Goldenrod, is a flowering plant in the United States....
(N) - Solidago sphacelata (N)
- Solidago squarrosa (N)
- Solidago uliginosa var. linoides (N)
- Solidago uliginosa var. uliginosa (N)
- Solidago ulmifolia var. ulmifolia (N)
- Sonchus arvensis ssp. arvensisSonchus arvensisSonchus arvensis is a medicinal plant. It is an invasive species in the Great Lakes region and was first sited in 1865.-External links:** Photos, Drawings, Text...
(I) - Sonchus arvensis ssp. uliginosusSonchus arvensisSonchus arvensis is a medicinal plant. It is an invasive species in the Great Lakes region and was first sited in 1865.-External links:** Photos, Drawings, Text...
(I) - Sonchus asperSonchus asperSonchus asper is an annual plant with spiny leaves and yellow flowers resembling those of the dandelion. The leaves are bluish-green, simple, lanceolate, with wavy and sometimes lobed margins, covered in spines on both the margins and beneath...
(I) - Sonchus oleraceusSonchus oleraceusSonchus oleraceus is a medicinal plant native to Asia and Europe, which is nutritious food for humans and most livestock.- Nutritive qualities :The common name Sow thistle refers to its...
(I) - Sorbaria sorbifoliaSorbaria sorbifoliaSorbaria sorbifolia is commonly known as False Spiraea, also spelled False Spirea. It is a deciduous perennial plant in the Rosaceae family. It is also known by its older names of Spiraea sorbifolia L. and Schizonotus sorbifolius Lindl...
(I) - Sorbus aucupariaSorbus aucupariaSorbus aucuparia , is a species of the genus Sorbus, native to most of Europe except for the far south, and northern Asia...
(I) - Sorbus decoraSorbus decoraSorbus decora, commonly known as the showy mountain-ash or "dogberry" is a deciduous shrub or very small tree native to northeastern North America. It occurs throughout the Great Lakes-St...
(N) - Sorghastrum nutansSorghastrum nutansSorghastrum nutans, commonly known as Yellow Indiangrass, is a North American prairie grass found in the central and eastern United States and Canada, especially in the Great Plains...
(N) - Sorghum bicolor ssp. bicolorSorghum bicolorSorghum bicolor, commonly called sorghum and also known as durra or jowari, is a grass species cultivated for its edible grain. Sorghum originated in northern Africa, and is now cultivated widely in tropical and subtropical regions. S. bicolor is typically an annual, but some cultivars are...
(I) - Sorghum halepense (I)
- Sparganium americanum (N)
- Sparganium androcladum (N)
- Sparganium emersumSparganium emersumSparganium emersum is a species of flowering plant in the cat-tail family known by the common name European bur-reed. It has a circumboreal distribution, occurring throughout the northern latitudes of Eurasia and North America. It is an aquatic plant, growing in shallow water bodies such as ponds...
(I) - Sparganium emersumSparganium emersumSparganium emersum is a species of flowering plant in the cat-tail family known by the common name European bur-reed. It has a circumboreal distribution, occurring throughout the northern latitudes of Eurasia and North America. It is an aquatic plant, growing in shallow water bodies such as ponds...
(N) - Sparganium eurycarpumSparganium eurycarpumSparganium eurycarpum is a species of bur-reed known by the common names giant bur-reed and broadfruit bur-reed. It is native to Eurasia and North America.-External links:***...
(N) - Spartina pectinataSpartina pectinataSpartina pectinata is a species of cordgrass known by the common name prairie cordgrass. It is native to central North America.-External links:***...
(N) - Spergula arvensis (I)
- Spergularia maritima (I)
- Spergularia rubraSpergularia rubraSpergularia rubra, the red sand spurrey or red sandspurry, is a plant species in the pink family. It is native to Europe and Asia, and it is present on other continents, including North and South America and Australia, as an introduced species and in many areas a common weed. It grows in a wide...
(I) - Spergularia salina (N)
- Spermacoce glabra (N)
- Sphenopholis intermedia (N)
- Sphenopholis nitida (N)
- Sphenopholis obtusataSphenopholis obtusataSphenopholis obtusata is a species of grass known by the common name prairie wedgescale. It is native to North America where it is widespread across southern Canada and the United States...
(N) - Sphenopholis × pallens (N)
- Sphenopholis pensylvanica (N)
- Spinacia oleracea (I)
- Spiraea alba var. albaSpiraea albaSpiraea alba, commonly known as narrowleaf meadowsweet, pale bridewort, or pipestem, grows on wet soils of the Allegheny Mountains and other portions of eastern North America....
(N) - Spiraea alba var. latifoliaSpiraea albaSpiraea alba, commonly known as narrowleaf meadowsweet, pale bridewort, or pipestem, grows on wet soils of the Allegheny Mountains and other portions of eastern North America....
(N) - Spiraea japonica var. fortuneiSpiraea japonicaSpiraea japonica is a plant in the family Rosaceae. Synonyms for the species name are Spiraea bumalda Burv. and Spiraea japonica var. alpina Maxim.-Description:...
(I) - Spiraea prunifolia (I)
- Spiraea tomentosa (N)
- Spiraea × vanhouttei (I)
- Spiraea virginianaSpiraea virginianaSpiraea virginiana is a rare species of flowering plant in the rose family known by the common name Virginia spiraea. It is native to the southern Appalachian Mountains, where it has a distribution scattered across nine states. However, most populations are very small and poor in quality...
(N) - Spiranthes cernuaSpiranthes cernuaSpiranthes cernua, commonly called the Nodding Ladies'-tresses, is a species of orchid occurring from eastern Canada to the central and eastern United States....
(N) - Spiranthes lacera var. gracilis (N)
- Spiranthes lacera var. lacera (N)
- Spiranthes lucida (N)
- Spiranthes magnicamporum (N)
- Spiranthes ochroleucaSpiranthes ochroleucaSpiranthes ochroleuca, commonly called the Yellow Nodding Ladies'-tresses, is a species of orchid occurring from southeastern Canada to the eastern United States....
(N) - Spiranthes ovalis var. erostellata (N)
- Spiranthes romanzoffianaSpiranthes romanzoffianaSpiranthes romanzoffiana, commonly known as the Hooded Lady's-tresses, is a species of orchid. Collected by Chamisso during the Romanzov expedition it was described by him in 1828 and named for Count Nikolay Rumyantsev who financed it....
(N) - Spiranthes tuberosa (N)
- Spiranthes vernalis (N)
- Spirodela polyrrhizaSpirodela polyrrhizaSpirodela polyrrhiza is a species of duckweed known by the common names greater duckweed, common duckmeat, and duckmeal. It can be found nearly worldwide in many types of freshwater habitat. It is a perennial aquatic plant usually growing in dense colonies, forming a mat on the water surface...
(N) - Sporobolus compositus var. compositusSporobolus compositusSporobolus compositus, alt. Sporobolus asper, Tall dropseed or composite dropseed, is a native North American prairie grass growing from two to four feet tall. Also called rough dropseed and meadow dropseed it is common on the Great Plains, and found in most states in the United States.It flowers...
(N) - Sporobolus cryptandrusSporobolus cryptandrusSporobolus cryptandrus is a species of grass known by the common name sand dropseed. It is native to North America, where it is widespread throughout southern Canada, most all of the United States, and northern Mexico.-Habitat:...
(N) - Sporobolus heterolepis (N)
- Sporobolus neglectus (N)
- Sporobolus vaginiflorus var. ozarkanusSporobolus vaginiflorusSporobolus vaginiflorus is a species of grass known by the common names poverty grass, poverty dropseed, and sheathed dropseed.-Distribution:...
(N) - Sporobolus vaginiflorus var. vaginiflorusSporobolus vaginiflorusSporobolus vaginiflorus is a species of grass known by the common names poverty grass, poverty dropseed, and sheathed dropseed.-Distribution:...
(N) - Stachys aspera (N)
- Stachys cordata (N)
- Stachys germanica (I)
- Stachys palustrisStachys palustrisStachys palustris, commonly known as Marsh Woundwort or Marsh Hedgenettle, is an edible perennial grassland herb growing to 80 centimeters tall. It is native to parts of Eurasia.-External links:**...
(N) - Stachys pilosa var. arenicola (N)
- Stachys sylvaticaStachys sylvaticaStachys sylvatica, commonly known as Hedge Woundwort, is a perennial grassland herb growing to 80 cm tall....
(I) - Stachys tenuifolia (N)
- Staphylea trifoliaStaphylea trifoliaStaphylea trifolia is native to eastern North America, from southern Ontario and southwestern Quebec west to Nebraska and Arkansas, and south to Florida....
(N) - Stellaria alsine (N)
- Stellaria corei (N)
- Stellaria gramineaStellaria gramineaStellaria graminea is a species of flowering plant in the Caryophyllaceae known by the common names grassleaf starwort and common stitchwort. It is native to Eurasia but it is widespread around other parts of the temperate world as an introduced species and a common weed. It grows in many types of...
(I) - Stellaria holosteaStellaria holosteaStellaria holostea is an ornamental plant native of Europe.It can grow up to 50cm in height, with leaves that are long, narrow and fresh green. The flowers are white, 20-30mm across and have five distinctive petals split to about half way down.-External links:**...
(I) - Stellaria longifolia var. longifoliaStellaria longifoliaStellaria longifolia is a species of flowering plant in the pink family known by the common name longleaf starwort. It is native to much of the northern half of the Northern Hemisphere, occurring throughout northern Europe and North America. It grows in many types of moist habitat, including...
(N) - Stellaria media ssp. media (I)
- Stellaria media ssp. pallida (I)
- Stellaria puberaStellaria puberaStellaria pubera is a wildflower found in the eastern United States and the Great Smokey Mountains.Star Chickweed Stellaria puberaIdentification:...
(N) - Stenanthium gramineum var. gramineum (N)
- Stenanthium gramineum var. robustum (N)
- Stenaria nigricans var. nigricans (N)
- Stenosiphon linifolius (N)
- Streptopus lanceolatus var. lanceolatus (N)
- Streptopus lanceolatus var. roseus (N)
- Strophostyles helvola (N)
- Strophostyles leiosperma (N)
- Strophostyles umbellata (N)
- Stuckenia filiformis ssp. alpina (N)
- Stuckenia pectinata (N)
- Stuckenia vaginata (N)
- Stylophorum diphyllum (N)
- Stylosanthes biflora (N)
- Styphnolobium japonicumStyphnolobium japonicumStyphnolobium japonicum Schott , the Pagoda Tree is a species of small tree or shrub in the subfamily Faboideae of the pea family Fabaceae....
(I) - Styrax americanus (N)
- Styrax grandifolius (N)
- Suaeda calceoliformisSuaeda calceoliformisSuaeda calceoliformis is a species of flowering plant in the amaranth family known by several common names, including Pursh seepweed and horned sea-blite. It is native to North America, where it can be found across most of the continent except for parts of the American southeast...
(N) - Sullivantia sullivantii (N)
- Symphoricarpos albus var. albusSymphoricarpos albusSymphoricarpos albus is a species of flowering plant in the honeysuckle family known by the common name common snowberry. It is native to North America, where it occurs across much of Canada and the northern United States. It grows in shady and moist mountain and forest habitat, in woodlands and on...
(N) - Symphoricarpos albus var. laevigatusSymphoricarpos albusSymphoricarpos albus is a species of flowering plant in the honeysuckle family known by the common name common snowberry. It is native to North America, where it occurs across much of Canada and the northern United States. It grows in shady and moist mountain and forest habitat, in woodlands and on...
(N) - Symphoricarpos occidentalisSymphoricarpos occidentalisSymphoricarpos occidentalis, commonly called Western snowberry or Wolfberry, is a woody species of flowering plant in the honeysuckle family...
(N) - Symphoricarpos orbiculatusSymphoricarpos orbiculatusSymphoricarpos orbiculatus, commonly called coralberry, buckbrush or Indian currant is a woody species of flowering plant in the honeysuckle family.-Description:...
(N) - Symphyotrichum boreale (N)
- Symphyotrichum ciliatum (N)
- Symphyotrichum cordifoliumSymphyotrichum cordifoliumSymphyotrichum cordifolium, commonly known as the Heartleaf Aster or Common Blue Wood Aster, is an herbaceous perennial native to eastern North America, where it is present from Manitoba in Canada, east to Nova Scotia and south through the United States to Georgia...
(N) - Symphyotrichum drummondii var. drummondii (N)
- Symphyotrichum dumosum var. strictior (N)
- Symphyotrichum ericoides var. ericoidesSymphyotrichum ericoidesSymphyotrichum ericoides, commonly known as the White Aster or Heath Aster, is an herbaceous perennial in the composite family...
(N) - Symphyotrichum laeve var. laeveSymphyotrichum laeveSymphyotrichum laeve is a flowering plant native to the United States and North America.-External links:*...
(N) - Symphyotrichum lanceolatum ssp. lanceolatum var. hirsuticaule (N)
- Symphyotrichum lanceolatum ssp. lanceolatum var. interior (N)
- Symphyotrichum lanceolatum ssp. lanceolatum var. lanceolatum (N)
- Symphyotrichum lanceolatum ssp. lanceolatum var. latifolium (N)
- Symphyotrichum lanceolatum ssp. lanceolatum (N)
- Symphyotrichum lateriflorum var. lateriflorum (N)
- Symphyotrichum lowrieanum (N)
- Symphyotrichum novae-angliae (N)
- Symphyotrichum oblongifolium (N)
- Symphyotrichum ontarionis (N)
- Symphyotrichum oolentangiense var. oolentangiense (N)
- Symphyotrichum patens var. patens (N)
- Symphyotrichum phlogifolium (N)
- Symphyotrichum pilosum var. pilosumSymphyotrichum pilosumSymphyotrichum pilosum, previously Aster pilosus, of the family Asteraceae is a flower located in the United States. Frost Aster and White Heath Aster are its common names....
(N) - Symphyotrichum pilosum var. pringleiSymphyotrichum pilosumSymphyotrichum pilosum, previously Aster pilosus, of the family Asteraceae is a flower located in the United States. Frost Aster and White Heath Aster are its common names....
(N) - Symphyotrichum praealtum var. praealtum (N)
- Symphyotrichum prenanthoides (N)
- Symphyotrichum puniceum var. puniceumSymphyotrichum puniceumSymphyotrichum puniceum , commonly known as Purplestem Aster, Red-stemmed Aster or Swamp Aster, is an herbaceous perennial native to eastern North America...
(N) - Symphyotrichum racemosum (N)
- Symphyotrichum sericeumSymphyotrichum sericeumSymphyotrichum sericeum is a species of flowering plant in the aster family known by several common names, including western silver aster and silky aster. It is native to the central plains of North America.-Distribution:...
(N) - Symphyotrichum shortii (N)
- Symphyotrichum subulatum (N)
- Symphyotrichum undulatum (N)
- Symphyotrichum urophyllum (N)
- Symphytum asperumSymphytum asperumSymphytum asperum is a flowering plant of the genus Symphytum in the family Boraginaceae. Common names include rough comfrey and prickly comfrey. It is native to Asia and it is known in Europe and North America as an introduced species and sometimes a weed.-References:* -External links:**...
(I) - Symphytum officinaleSymphytum officinaleSymphytum officinale is a perennial flowering plant of the genus Symphytum in the family Boraginaceae. Along with several other species of Symphytum, it is commonly known as comfrey. To differentiate it from other comfreys, this species may be known as common comfrey, Quaker comfrey, and cultivated...
(I) - Symplocarpus foetidus (N)
- Synandra hispidula (N)
- Syringa vulgaris (I)
T
- Taenidia integerrima (N)
- Tagetes erectaTagetes erectaTagetes erecta, the Mexican marigold, also called Aztec marigold, is a species of the genus Tagetes native to Mexico and Central America. Despite its being native to the Americas, it is often called African marigold. In Mexico, this plant is found in the wild in the states of San Luis Potosí,...
(I) - Tagetes patula (I)
- Tamarix chinensisTamarix chinensisTamarix chinensis is a species of tamarisk known by the common names Chinese tamarisk and five-stamen tamarisk or saltcedar. It is native to China and Korea, and it is known in many other parts of the world as an introduced species and sometimes an invasive noxious weed. It easily inhabits moist...
(I) - Tanacetum balsamitaTanacetum balsamitaTanacetum balsamita, or Balsamita vulgaris, is a perennial temperate herb known as costmary, alecost, balsam herb, bible leaf, or mint geranium....
(I) - Tanacetum coccineum (I)
- Tanacetum parthenium (I)
- Tanacetum vulgare (I)
- Taraxacum laevigatumTaraxacum laevigatumTaraxacum laevigatum is a type of dandelion that grows in Europe, including Britain....
(I) - Taraxacum officinaleTaraxacum officinaleTaraxacum officinale, the common dandelion , is a herbaceous perennial plant of the family Asteraceae . It can be found growing in temperate regions of the world, in lawns, on roadsides, on disturbed banks and shores of water ways, and other areas with moist soils. T...
(N) - Taraxacum officinale ssp. officinaleTaraxacum officinaleTaraxacum officinale, the common dandelion , is a herbaceous perennial plant of the family Asteraceae . It can be found growing in temperate regions of the world, in lawns, on roadsides, on disturbed banks and shores of water ways, and other areas with moist soils. T...
(I) - Taxodium distichumTaxodium distichumTaxodium distichum is a species of conifer native to the southeastern United States.-Characteristics:...
(N) - Taxus canadensisTaxus canadensisTaxus canadensis is a conifer native to central and eastern North America, thriving in swampy woods, ravines, riverbanks and on lake shores. Locally called simply "Yew", this species is also referred to as American Yew or Ground-hemlock.Most of its range is well north of the Ohio River...
(N) - Taxus cuspidataTaxus cuspidataTaxus cuspidata is a member of the genus Taxus, native to Japan, Korea, northeast China and the extreme southeast of Russia....
(I) - Tephrosia virginianaTephrosia virginianaTephrosia virginiana, also known as Goat's Rue, is a perennial dicot in Fabaceae. This subshrub has alternate compound leaves. All parts of the plant are pubescent giving it a silvery, hoary appearance. The terminal, compact racemes of cream and deep pink flowers bloom May to August. This plant...
(N) - Tetradium danielliiTetradium danielliiTetradium daniellii is a species of flowering plant in the Rutaceae family.-References:*Qingyuan Zhou, Robert I. Bertin, and Dezhi Fu,Gender Dimorphism in Tetradium daniellii : Floral Biology, Gametogenesis, and Sexual System Evolution, Int. J Plant Sci. 167:201–212. 2006....
(I) - Tetragonia tetragonioides (I)
- Tetraneuris herbaceaTetraneuris herbaceaTetraneuris herbacea is a rare species of flowering plant in the aster family known by the common names lakeside daisy, eastern four-nerved daisy, fournerved starflower, and Manitoulin gold. It is native to the Great Lakes region in North America, where it is present in Ontario, Ohio, Michigan, and...
(N) - Teucrium canadense var. canadense (N)
- Teucrium canadense var. occidentale (N)
- Thalictrum dasycarpum (N)
- Thalictrum dioicumThalictrum dioicumThalictrum dioicum is a species of herbaceous plants in the family Ranunculaceae. Plants are typically upright growing woodland natives from central and eastern North America including parts of south eastern Canada...
(N) - Thalictrum pubescensThalictrum pubescensThalictrum pubescens is a plant in the buttercup family, Ranunculaceae.-Description:Thalictrum pubescens is a herbaceous plant with alternate, pinnately compound leaves, on hollow, green stems. The flowers are white, borne in spring and summer....
(N) - Thalictrum revolutum (N)
- Thalictrum thalictroidesThalictrum thalictroidesThalictrum thalictroides is a spring ephemeral plant in the buttercup family, prized for its white to pink flowers, native to woodland in eastern North America.-Description:...
(N) - Thaspium barbinode (N)
- Thaspium trifoliatum var. aureum (N)
- Thaspium trifoliatum var. trifoliatum (N)
- Thelypteris noveboracensisThelypteris noveboracensisThelypteris noveboracensis, or the New York fern, is a fern found throughout the eastern United States and Canada. It is distinctive by its pinnae tapering to the base of the frond, and by its forming extensive clonal colonies on ridgetops and mountain benches...
(N) - Thelypteris palustris var. pubescensThelypteris palustrisThelypteris palustris, or the marsh fern, is a fern native to eastern North America and across Eurasia. It prefers to grow in marshy situations in full sun.-References:*...
(N) - Thlaspi alliaceum (I)
- Thlaspi arvenseThlaspi arvenseThlaspi arvense is a foetid Eurasian plant having round flat pods; naturalized throughout North America. It is also related to the Lepidium species in the cabbage family.-Edible uses:...
(I) - Thuja occidentalisThuja occidentalisThuja occidentalis is an evergreen coniferous tree, in the cypress family Cupressaceae, which is widely cultivated for use as an ornamental plant known as American Arbor Vitae. The endemic occurrence of this species is a northeastern distribution in North America...
(N) - Thymelaea passerina (I)
- Thymelaea passerina (N)
- Thymus praecox ssp. arcticusThymus praecoxThymus praecox is a species of thyme. A common name is Mother-of-Thyme; "creeping thyme" and "wild thyme" may be used where Thymus serpyllum, normally called thus, is not found. This thyme has a strong scent similar to Oregano. It can be used in cuisine or as an evergreen ground cover for gardens.T...
(I) - Tiarella cordifolia var. cordifolia (N)
- Tilia americana var. americanaTilia americanaTilia americana is a species of Tilia native to eastern North America, from southeast Manitoba east to New Brunswick, southwest to northeast Texas, and southeast to South Carolina, and west along the Niobrara River to Cherry County, Nebraska...
(N) - Tilia americana var. heterophyllaTilia americanaTilia americana is a species of Tilia native to eastern North America, from southeast Manitoba east to New Brunswick, southwest to northeast Texas, and southeast to South Carolina, and west along the Niobrara River to Cherry County, Nebraska...
(N) - Tilia × europaeaTilia × europaeaTilia × europaea L., generally known as the Common Lime, is a naturally occurring hybrid between Tilia cordata and Tilia platyphyllos...
(I) - Tipularia discolorTipularia discolorThe Crane-fly Orchid is a perennial terrestrial woodland orchid, a member of the Orchidaceae. It is the only species of the genus Tipularia found in North America. This orchid grows a single leaf in September that disappears in the spring. The leaf is green with dark purple spots. The orchid...
(N) - Torilis arvensis ssp. arvensisTorilis arvensisTorilis arvensis is a species of flowering plant in the parsley family known by the common names common hedge parsley and spreading hedge parsley. It is native to parts of Europe and it is known elsewhere, such as North America, as an introduced species and a common weed. It grows in many types of...
(N) - Torilis arvensis ssp. arvensisTorilis arvensisTorilis arvensis is a species of flowering plant in the parsley family known by the common names common hedge parsley and spreading hedge parsley. It is native to parts of Europe and it is known elsewhere, such as North America, as an introduced species and a common weed. It grows in many types of...
(I) - Torilis japonicaTorilis japonicaTorilis japonica, the Japanese hedge parsley, is a plant species in the genus Torilis....
(I) - Torreyochloa pallida var. pallidaTorreyochloa pallidaTorreyochloa pallida is a species of grass known by the common name pale false mannagrass. It is native to North America, especially the east and west sides. It grows in wet habitat, such as rivers, lakesides, bogs, and swamps. It is a rhizomatous perennial grass producing thick, erect to...
(N) - Toxicodendron radicans ssp. negundo (N)
- Toxicodendron rydbergii (N)
- Toxicodendron vernix (N)
- Tradescantia ohiensisTradescantia ohiensisTradescantia ohiensis is a species of Tradescantia native to much of the eastern United States. It is the most common species of Tradescantia in the wild in the United States....
(N) - Tradescantia subaspera var. subaspera (N)
- Tradescantia virginianaTradescantia virginianaTradescantia virginiana is a species of Tradescantia native to the eastern United States. Spiderwort is commonly grown in gardens and many garden spiderworts seem to be hybrids of T...
(N) - Tragopogon dubius (I)
- Tragopogon lamottei (I)
- Tragopogon porrifolius (I)
- Triadenum fraseri (N)
- Triadenum tubulosum (N)
- Triadenum virginicum (N)
- Triadenum walteri (N)
- Triantha glutinosa (N)
- Tribulus terrestrisTribulus terrestrisTribulus terrestris is a flowering plant in the family Zygophyllaceae, native to warm temperate and tropical regions of the Old World in southern Europe, southern Asia, throughout Africa, and Australia. It can thrive even in desert climates and poor soil...
(I) - Trichomanes boschianum (N)
- Trichomanes intricatumTrichomanes intricatumTrichomanes intricatum is known as the weft fern. This is an unusual filmy fern that grows in rock shelters and crevices in the eastern United States, being known only from its gametophyte generation...
(N) - Trichophorum planifolium (N)
- Trichostema brachiatum (N)
- Trichostema dichotomumTrichostema dichotomumTrichostema dichotomum is a plant in the mint family, Lamiaceae. Trichostema dichotomum is an annual herbaceous forb with opposite, simple leaves, and square, erect, hairy stems. The flowers are blue, borne in late summer....
(N) - Trichostema setaceum (N)
- Tridens flavus var. flavus (N)
- Trientalis borealis ssp. borealisTrientalis borealisTrientalis borealis is a North American woodland perennial, it is also known as the Starflower. The starflower grows up to 9 inches tall and has one or two white flowers which consist of seven petals that form a star-like shape. The flowers are found on top of stalks which are above the lanceolate...
(N) - Trifolium ambiguum (I)
- Trifolium arvense (I)
- Trifolium aureum (I)
- Trifolium campestre (I)
- Trifolium dubiumTrifolium dubiumTrifolium dubium, the Lesser Hop Trefoil or suckling clover is a plant in the family Fabaceae. This species is generally accepted as the primary plant to represent the traditional Irish Shamrock....
(I) - Trifolium hybridumTrifolium hybridumTrifolium hybridum, alsike clover, is a plant species of the genus Trifolium in the pea family Fabaceae. The stalked, pale pink or whitish flower head grows from the leaf axils, and the trifoliate leaves are unmarked. The plant is tall, and is found in fields and on roadsides – it is also...
(I) - Trifolium incarnatum (I)
- Trifolium pratense (I)
- Trifolium reflexum (N)
- Trifolium repens (I)
- Trifolium resupinatumTrifolium resupinatumTrifolium resupinatum is an annual clover used as fodder and hay, which reaches tall when cultivated, and forms rosettes when grazed or mowed. It is native to central and southern Europe, the Mediterranean, and southwest Asia as far south as the Punjab...
(I) - Trifolium stoloniferum (N)
- Triglochin maritima (N)
- Triglochin palustrisTriglochin palustrisTriglochin palustris or Marsh Arrowgrass is a variety of arrowgrass found in damp grassland usually on calcareous soils, fens and meadows. It has a circumboreal distribution, occurring throughout northern parts of the Northern Hemisphere. It can be found locally in the British Isles especially the...
(N) - Trillium cernuumTrillium cernuumTrillium cernuum is a species of Trillium native to northeastern North America, from Newfoundland west to southern Saskatchewan, and south to northern Virginia and Iowa...
(N) - Trillium erectumTrillium erectumTrillium erectum, also known as Wake-robin, red trillium, purple trillium, Beth root or Stinking Benjamin, is a spring-flowering perennial plant native to the east and north-eastern areas of North America. The flowers are a deep red colour, and the plant takes its name Wake-robin by analogy with...
(N) - Trillium flexipesTrillium flexipesTrillium flexipes, the Bent Trillium or Drooping Trillium, is a spring-flowering perennial which is most common in the midwestern United States. Scattered populations are found as far east as Philadelphia and as far south as Alabama. However, it is an endangered plant species in Canada and is rare...
(N) - Trillium grandiflorumTrillium grandiflorumTrillium grandiflorum, commonly known as white trillium, great white trillium, white wake-robin, or in French as trille blanc, is a perennial monocotyledonous plant in the lily family...
(N) - Trillium nivaleTrillium nivaleTrillium nivale, the snow trillium or dwarf white trillium, is a member of the Trilliaceae family. It is native to parts of the east and midwest United States, and is one of the earliest flowers to bloom. Along the Ohio River valley, flowers may be seen in early March. At its northern limit in...
(N) - Trillium recurvatumTrillium recurvatumTrillium recurvatum, the Bloody butcher or Prairie trillium, is a member of the Trilliaceae family. It occurs in parts of the central and eastern United States from Iowa south to Texas and east to North Carolina and Pennsylvania, usually mesic deciduous forest, including tallgrass prairie savannah...
(N) - Trillium sessileTrillium sessileTrillium sessile is a perennial spring wildflower native to the central part of the eastern United States and the Ozarks. It is a small trillium . Toadshade can be distinguished from other trilliums by its single foul smelling, stalkless, flower nestled in the middle of its three leaves...
(N) - Trillium undulatumTrillium undulatumTrillium undulatum is a wildflower of the genus trillium found from Ontario in the north to the Carolinas in the south and from Michigan in the west to Nova Scotia in the east. It is also known as painted lady or trille ondulé...
(N) - Triodanis perfoliataTriodanis perfoliataTriodanis perfoliata, the Clasping Venus's Looking Glass, is an annual herb native to North America. It is a flowering plant belonging to the family Campanulaceae.- Description :...
(N) - Triosteum angustifoliumTriosteum angustifoliumTriosteum angustifolium, commonly known as yellow horse gentian , is a species of flowering plant of the Caprifoliaceae family. It is found Eastern North America, primarily in Limestone regions....
(N) - Triosteum aurantiacum var. aurantiacum (N)
- Triosteum aurantiacum var. glaucescens (N)
- Triosteum aurantiacum var. illinoense (N)
- Triosteum perfoliatum (N)
- Triphora trianthophora (N)
- Triplasis purpurea (N)
- Tripleurospermum maritimumTripleurospermum maritimumA common seaside plant, Tripleurospermum maritimum is also known as Matricaria maritimum, commonly known as sea mayweed. It is found in many coastal areas of Northern Europe, including Scandinavia and Iceland, often growing in sand or amongst beach pebbles.As with many maritime plants, sea mayweed...
(N) - Tripleurospermum maritimum ssp. maritimumTripleurospermum maritimumA common seaside plant, Tripleurospermum maritimum is also known as Matricaria maritimum, commonly known as sea mayweed. It is found in many coastal areas of Northern Europe, including Scandinavia and Iceland, often growing in sand or amongst beach pebbles.As with many maritime plants, sea mayweed...
(I) - Tripsacum dactyloidesTripsacum dactyloidesTripsacum dactyloides is a prairie grass of the Great Plains. Gama Grass is found as far northwest as Nebraska....
(N) - Triticum aestivum (I)
- Trollius laxus ssp. laxus (N)
- Tsuga canadensis (N)
- Tulipa gesnerianaTulipa gesnerianaTulipa gesneriana L. or "Didier's tulip" is a plant belonging to the family of Liliaceae. This species has uncertain origins, possibly from Asia, and has become naturalised in south-west Europe...
(I) - Tussilago farfara (I)
- Typha angustifoliaTypha angustifoliaTypha angustifolia L., , is a perennial herbaceous plant of genus Typha. This cattail is an "obligate wetland" species that is commonly found in the northern hemisphere in brackish locations...
(I) - Typha angustifoliaTypha angustifoliaTypha angustifolia L., , is a perennial herbaceous plant of genus Typha. This cattail is an "obligate wetland" species that is commonly found in the northern hemisphere in brackish locations...
(N) - Typha × glauca (N)
- Typha latifoliaTypha latifoliaTypha latifolia is a perennial herbaceous plant in the genus Typha. It is found as a native plant species in North and South America, Europe, Eurasia, and Africa...
(N)
U
- Ulmus americana (N)
- Ulmus procera (I)
- Ulmus pumila (I)
- Ulmus rubraUlmus rubraUlmus rubra, the Slippery Elm, is a species of elm native to eastern North America...
(N) - Ulmus thomasii (N)
- Urtica chamaedryoides (N)
- Urtica dioica ssp. gracilis (N)
- Urtica dioica ssp. dioica (I)
- Utricularia cornutaUtricularia cornutaUtricularia cornuta, the horned bladderwort, is a small to medium sized, probably perennial carnivorous plant that belongs to the genus Utricularia. U. cornuta is endemic to North America and can be found in the Bahamas, Cuba, Canada, and the United States...
(N) - Utricularia geminiscapaUtricularia geminiscapaUtricularia geminiscapa, the hiddenfruit bladderwort, is a perennial, medium-sized species of aquatic bladderwort. This species occurs naturally in the northeastern USA and Canada with one record from British Columbia in Western Canada...
(N) - Utricularia gibbaUtricularia gibbaUtricularia gibba, commonly known as the humped or floating bladderwort, is a small, mat forming species of aquatic bladderwort...
(N) - Utricularia intermediaUtricularia intermediaUtricularia intermedia, the flatleaf bladderwort, is a small, perennial carnivorous plant that belongs to the genus Utricularia. It is usually found affixed to the substrate but it can also survive suspended in a body of water. U. intermedia is a circumboreal species and is found in North America,...
(N) - Utricularia macrorhizaUtricularia macrorhizaUtricularia macrorhiza, the common bladderwort, is a large, perennial suspended aquatic carnivorous plant that belongs to the genus Utricularia. U. macrorhiza is native to North America and eastern temperate Asia.-External links:*...
(N) - Utricularia minorUtricularia minorUtricularia minor, the lesser bladderwort, is a small, perennial carnivorous plant that belongs to the genus Utricularia. It is usually found affixed to the substrate but it can also survive suspended in a body of water. U. minor is a circumboreal species and is found in North America, Asia, and...
(N) - Uvularia grandiflora (N)
- Uvularia perfoliata (N)
- Uvularia sessilifoliaUvularia sessilifoliaSessile bellwort or wild oats is a species of bellwort native to Eastern North America. It grows in woodlands with wet or dry soils.The strap-like leaves are sessile on the stem...
(N)
V
- Vaccaria hispanicaVaccaria hispanicaVaccaria is a monotypic genus of flowering plants in the pink family containing the single species Vaccaria hispanica. It is known by several common names including cowherb, cowcockle, and cow soapwort. Its subspecies were previously treated as separate species. It is used medicinally in Chinese...
(I) - Vaccinium angustifolium (N)
- Vaccinium corymbosum (N)
- Vaccinium fuscatum (N)
- Vaccinium macrocarponVaccinium macrocarponVaccinium macrocarpon is a cranberry of the subgenus Oxycoccus and genus Vaccinium...
(N) - Vaccinium myrtilloides (N)
- Vaccinium oxycoccos (N)
- Vaccinium pallidum (N)
- Vaccinium simulatum (N)
- Vaccinium stamineumVaccinium stamineumVaccinium stamineum, commonly known as deerberry, squaw huckleberry or gooseberry, is a flowering shrub in the heath family. The plant is native to eastern North America from Ontario in the north, south to Florida and west to Texas...
(N) - Valeriana edulis var. ciliata (N)
- Valeriana officinalis (I)
- Valeriana pauciflora (N)
- Valeriana uliginosa (N)
- Valerianella chenopodiifolia (N)
- Valerianella locusta (I)
- Valerianella radiata (N)
- Valerianella umbilicata (N)
- Vallisneria americana (N)
- Veratrum virginicum (N)
- Veratrum viride (N)
- Veratrum woodii (N)
- Verbascum blattariaVerbascum blattariaVerbascum blattaria, or moth mullein, is a species of flowering biennial weed belonging to the Scrophulariacea family. An invasive species native to Eurasia and North Africa, it has naturalized in the United States and most of Canada since its introduction...
(I) - Verbascum phlomoides (I)
- Verbascum phoeniceum (I)
- Verbascum thapsus (I)
- Verbascum virgatumVerbascum virgatumVerbascum virgatum, commonly known as Twiggy Mullein and Wand Mullein, is a plant species in the family Scrophulariaceae.-Description:...
(I) - Verbena bracteataVerbena bracteataVerbena bracteata is a species of verbena known by the common names bigbract verbena, prostrate vervain, and carpet vervain. It is native to North America where it is widespread, occurring throughout the continent except for northern Canada and southern Mexico. It occurs in many types of habitat,...
(N) - Verbena × engelmannii (N)
- Verbena hastata var. hastataVerbena hastataVerbena hastata is a flowering plant in the vervain family, Verbenaceae. It is a herb with opposite, simple leaves which have double-serate margins, borne on stiffly erect, branching square stems. The flowers appear in summer and are purple...
(N) - Verbena × moechina (N)
- Verbena simplex (N)
- Verbena stricta (N)
- Verbena urticifolia var. leiocarpaVerbena urticifoliaVerbena urticifolia is a herbaceous plant in the vervain family . It belongs to the "true" vervains of genus Verbena.White Vervain has opposite, simple leaves on thin, rigid, green stems...
(N) - Verbena urticifolia var. urticifoliaVerbena urticifoliaVerbena urticifolia is a herbaceous plant in the vervain family . It belongs to the "true" vervains of genus Verbena.White Vervain has opposite, simple leaves on thin, rigid, green stems...
(N) - Verbesina alternifolia (N)
- Verbesina helianthoides (N)
- Verbesina occidentalis (N)
- Verbesina virginica var. virginica (N)
- Vernonia arkansana (N)
- Vernonia fasciculata ssp. fasciculata (N)
- Vernonia gigantea ssp. gigantea (N)
- Vernonia × illinoensis (N)
- Vernonia missurica (N)
- Vernonia noveboracensisVernonia noveboracensisVernonia noveboracensis is a plant in the daisy family, Asteraceae. It is native to the eastern United States, from Florida to Massachusetts and west to Tennessee, Alabama, and West Virginia....
(N) - Veronica agrestisVeronica agrestisVeronica agrestis or Green Field-speedwell is a plant belonging to the family Plantaginaceae....
(I) - Veronica americanaVeronica americanaVeronica americana, variously called American Brooklime or American Speedwell, is a plant native to temperate and arctic Asia and North America where it grows in streams and bottomlands....
(N) - Veronica anagallis-aquaticaVeronica anagallis-aquaticaVeronica anagallis-aquatica is a species of flowering plant in the plantain family known by the common names water speedwell, blue speedwell, and brook pimpernel. Its true native range is not clear, but the plant is present on most continents, and in most places it is probably naturalized...
(N) - Veronica arvensisVeronica arvensisVeronica arvensis is a medicinal plant and noxious weed native to Africa, Asia and Europe ....
(I) - Veronica austriaca ssp. teucrium (I)
- Veronica beccabunga (I)
- Veronica chamaedrysVeronica chamaedrysVeronica chamaedrys is a species of Veronica, native to Europe and northern Asia. It is found on other continents as an introduced species. It is a herbaceous perennial plant with hairy stems and leaves. It can grow to 25 cm tall, but is normally about 12 cm tall. The flowers are blue,...
(I) - Veronica filiformisVeronica filiformisVeronica filiformis is a species of flowering plant in the genus Veronica. It is known by many common names, including slender speedwell, creeping speedwell, threadstalk speedwell and Whetzel weed. It is native to eastern Europe and western Asia, and it is known in many other regions as an...
(I) - Veronica hederifoliaVeronica hederifoliaVeronica hederifolia is a flowering plant belonging to the family Plantaginaceae. It is native to Eurasia and it is present in other places as an introduced species and a common weed. It is an annual herb growing from a taproot and producing a hairy, spreading stem up to about 60 centimeters long...
(I) - Veronica officinalis var. officinalisVeronica officinalisVeronica officinalis is a species of Veronica, native to Europe and western Asia....
(I) - Veronica peregrina ssp. peregrinaVeronica peregrinaVeronica peregrina is a species of flowering plant in the plantain family known by several common names, including neckweed, American speedwell and purslane speedwell. It is native to the Americas, and it is known on other continents as an introduced species and a common weed...
(N) - Veronica peregrina ssp. xalapensisVeronica peregrinaVeronica peregrina is a species of flowering plant in the plantain family known by several common names, including neckweed, American speedwell and purslane speedwell. It is native to the Americas, and it is known on other continents as an introduced species and a common weed...
(N) - Veronica persicaVeronica persicaVeronica persica is a flowering plant native of Eurasia. First recorded in Britain in 1825 and now widespread in the United States, and east Asia .-General description:The seed leaves are broadly triangular cotyledons, with truncated base...
(I) - Veronica politaVeronica politaVeronica polita or Grey Field-speedwell is a plant species of the genus Veronica....
(I) - Veronica scutellataVeronica scutellataVeronica scutellata is a species of flowering plant in the plantain family known by the common names marsh speedwell, grassleaf speedwell, and skullcap speedwell. It is native to northern North America, including most of Canada and the northern half of the United States. It occurs in moist and wet...
(N) - Veronica serpyllifoliaVeronica serpyllifoliaVeronica serpyllifolia is a perennial flowering plant in the plantain family. It can be found on most continents.-Description:The leaves are oval, borne on creeping stems...
(N) - Veronica serpyllifolia ssp. serpyllifoliaVeronica serpyllifoliaVeronica serpyllifolia is a perennial flowering plant in the plantain family. It can be found on most continents.-Description:The leaves are oval, borne on creeping stems...
(I) - Veronica verna (I)
- Veronicastrum virginicumVeronicastrum virginicumVeronicastrum virginicum is a wildflower native to the United States...
(N) - Viburnum acerifoliumViburnum acerifoliumViburnum acerifolium is a species of Viburnum, native to eastern North America from southwestern Quebec and Ontario south to northern Florida and eastern Texas....
(N) - Viburnum buddleifolium (I)
- Viburnum dentatum var. dentatumViburnum dentatumViburnum dentatum — southern arrowwood or arrowwood viburnum or roughish arrowwood — is a small shrub, native to the Eastern United States and Canada from Maine south to Northern Florida and Eastern Texas....
(N) - Viburnum dentatum var. venosumViburnum dentatumViburnum dentatum — southern arrowwood or arrowwood viburnum or roughish arrowwood — is a small shrub, native to the Eastern United States and Canada from Maine south to Northern Florida and Eastern Texas....
(N) - Viburnum lantanaViburnum lantanaViburnum lantana is a species of Viburnum, native to central, southern and western Europe , northwest Africa, and southwestern Asia. The vigorous deciduous european treelike shrub is common along waysides. It is a deciduous shrub or small tree growing to 4-5 m tall...
(I) - Viburnum lantanoidesViburnum lantanoidesViburnum lantanoides is a perennial shrub of the family Adoxaceae growing 2–4 meters high with pendulous branches that take root where they touch the ground...
(N) - Viburnum lentagoViburnum lentagoViburnum lentago is a species of Viburnum native to the northeastern and midwestern United States, and in southern Canada from New Brunswick west to southeastern Saskatchewan. Isolated populations are found in the Dakotas, Wyoming, Colorado, and the Appalachian Mountains as far south as Kentucky...
(N) - Viburnum molle (N)
- Viburnum nudum var. cassinoidesViburnum nudumViburnum nudum is a plant in the muskroot family, Adoxaceae.-Description:...
(N) - Viburnum opulus var. americanumViburnum opulusViburnum opulus is a species of Viburnum, native to Europe and Asia. Some botanists also treat the closely related North American species Viburnum trilobum as a variety of it , or a subspecies, Viburnum opulus subsp...
(N) - Viburnum opulus var. opulusViburnum opulusViburnum opulus is a species of Viburnum, native to Europe and Asia. Some botanists also treat the closely related North American species Viburnum trilobum as a variety of it , or a subspecies, Viburnum opulus subsp...
(I) - Viburnum plicatumViburnum plicatumViburnum plicatum is a species of Viburnum, native to eastern Asia, in China, Korea, Japan, and Taiwan.It is a deciduous shrub growing to 3 m tall. The leaves are opposite, 5–10 cm long and 3–6 cm broad, simple ovate to oval, with a serrated margin...
(I) - Viburnum prunifoliumViburnum prunifoliumViburnum prunifolium , is a species of Viburnum native to southeastern North America, from Connecticut west to eastern Kansas, and south to Alabama and Texas.-Growth:It is a deciduous shrub or small tree growing to 2–9 m tall with a short crooked trunk and stout...
(N) - Viburnum rafinesqueanum (N)
- Viburnum recognitum (N)
- Viburnum × rhytidophylloides (I)
- Viburnum rufidulumViburnum rufidulumViburnum rufidulum, also known as the rusty blackhaw, blue haw, rusty nanny-berry, or southern black haw, is a flowering species of shrub or small tree that is common in parts of the Eastern and Central United States...
(N) - Vicia americana ssp. americanaVicia americanaVicia americana is a species of legume in the vetch genus known by the common names American vetch and purple vetch. It includes a subspecies known as mat vetch. It is a climbing perennial forb that grows from both taproot and rhizome. The leaves are each made up of oblong leaflets and have...
(N) - Vicia caroliniana (N)
- Vicia cracca ssp. cracca (I)
- Vicia hirsutaVicia hirsutaVicia hirsuta is a species of flowering plant from the large genus Vicia. It is native to Europe and Western Asia. It can be found on other continents as an introduced species...
(I) - Vicia sativa ssp. nigra (I)
- Vicia sativa ssp. sativa (I)
- Vicia tetraspermaVicia tetraspermaVicia tetrasperma is a species from the large genus Vicia. This vetch is native to Europe, Asia, and North Africa, and it can be found on other continents as an introduced species.-External links:*******...
(I) - Vicia villosa ssp. varia (I)
- Vicia villosa ssp. villosa (I)
- Vigna unguiculata (I)
- Vinca majorVinca majorVinca major, with the common names Bigleaf Periwinkle, Large Periwinkle, Greater Periwinkle and Blue Periwinkle, is an herbaceous, perennial, rhizomatous and stoloniferous flowering plant in the genus Vinca belonging to the family Apocynaceae.-Etymology:The genus name probably derives from the...
(I) - Vinca minorVinca minorVinca minor, Lesser periwinkle and Dwarf periwinkle, is a plant native to central and southern Europe, from Portugal and France north to the Netherlands and the Baltic States, and east to the Caucasus, and also in southwestern Asia in Turkey...
(I) - Viola affinis (N)
- Viola arvensisViola arvensisViola arvensis is a species of violet known by the common name field pansy. It is native to Europe, western Asia, and North Africa, and it is known on other continents as an introduced species and a weed of disturbed and cultivated areas....
(I) - Viola × bernardii (N)
- Viola bicolorViola bicolorViola bicolor, commonly known as the American field pansy or wild pansy, is an annual plant in the violet family found throughout much of North America...
(N) - Viola × bissellii (N)
- Viola blanda var. blandaViola blandaViola blanda is a flowering perennial plant in the Violet family . It is native to parts of eastern and western Canada and the northeastern, north-central, and southeastern United States....
(N) - Viola blanda var. palustriformisViola blandaViola blanda is a flowering perennial plant in the Violet family . It is native to parts of eastern and western Canada and the northeastern, north-central, and southeastern United States....
(N) - Viola × brauniae (N)
- Viola canadensis var. canadensisViola canadensisViola canadensis is more commonly known as Canadian white violet, Canada Violet, tall white violet, or white violet. As its name suggests, it is a species of violet which bears white blooms. The flowers are white, with yellow bases and sometimes streaks of purple. The leaves are heart shaped, with...
(N) - Viola × conjugens (N)
- Viola × consobrina (N)
- Viola × cooperrideri (N)
- Viola × cordifolia (N)
- Viola cucullataViola cucullataViola cucullata is a species of the genus Viola native to eastern North America, from Newfoundland west to Ontario and Minnesota, and south to Georgia....
(N) - Viola × eclipes (N)
- Viola × filicetorum (N)
- Viola hastata (N)
- Viola hirsutula (N)
- Viola labradoricaViola labradoricaViola labradorica is a perennial native to Greenland, eastern Canada, and the United States. The plant sold as Viola labradorica by nurseries is Viola riviniana.-Culinary:...
(N) - Viola lanceolata ssp. lanceolata (N)
- Viola macloskeyi ssp. pallensViola macloskeyiViola macloskeyi is a flowering perennial plant in the Violet family .It is native to Canada, the Northeastern, North-Central, Northwestern,...
(N) - Viola × malteana (N)
- Viola missouriensis (N)
- Viola nephrophyllaViola nephrophyllaViola nephrophylla is an annual or perennial forb in the Violet family native to North America....
(N) - Viola odorata (I)
- Viola × palmata (N)
- Viola pedataViola pedataViola pedata is an ornamental plant in the Violaceae family. Monophyletic in stature, this violet, also known as the "mountain pansy" is endemic to eastern North America, where it favors well drained, acidic soils in full to partial sun environments...
(N) - Viola pedatifidaViola pedatifidaViola pedatifida Viola pedatifida Viola pedatifida (Prairie violet, Crow-foot violet, larkspur violet, purple prairie violet, coastal violet; syn. Viola pedatifida subsp. brittoniana (Pollard) L. E. McKinney, Viola pedatifida G. Don subsp. pedatifida, Viola palmata L. var...
(N) - Viola × populifolia (N)
- Viola × primulifolia (N)
- Viola pubescens var. pubescensViola pubescensViola pubescens, often called Downy yellow violet, is a plants species of the genus Viola. It is found in dry mixed and deciduous woodland areas of the United States and Canada; from Minnesota and Ontario to Nova Scotia, South to Virginia...
(N) - Viola pubescens var. scabriusculaViola pubescensViola pubescens, often called Downy yellow violet, is a plants species of the genus Viola. It is found in dry mixed and deciduous woodland areas of the United States and Canada; from Minnesota and Ontario to Nova Scotia, South to Virginia...
(N) - Viola × ravida (N)
- Viola rostrataViola rostrataViola rostrata, is a stemmed herbaceous perennial plant that is native to eastern North America. It is known by a number of common names including long-spurred violet.-General description:...
(N) - Viola rotundifolia (N)
- Viola sagittata var. ovata (N)
- Viola sagittata var. sagittata (N)
- Viola selkirkii (N)
- Viola × slavinii (N)
- Viola sororiaViola sororiaViola sororia, known commonly as the Common Blue Violet, is a stemless herbaceous perennial plant that is native to eastern North America...
(N) - Viola striata (N)
- Viola tricolor (I)
- Viola triloba var. dilatata (N)
- Viola triloba var. triloba (N)
- Viola tripartita (N)
- Viola walteri (N)
- Viola × wittrockiana (I)
- Vitex negundo var. heterophyllaVitex negundoVitex negundo, commonly known as the five-leaved chaste tree, is a large aromatic shrub with quadrangular, densely whitish, tomentose branchlets...
(I) - Vitis aestivalis var. aestivalisVitis aestivalisVitis aestivalis is a species of grape native to eastern North America from southern Ontario east to Vermont, west to Oklahoma, and south to Florida and Texas. It is a vigorous vine, growing to 10 m or more high in trees...
(N) - Vitis aestivalis var. bicolorVitis aestivalisVitis aestivalis is a species of grape native to eastern North America from southern Ontario east to Vermont, west to Oklahoma, and south to Florida and Texas. It is a vigorous vine, growing to 10 m or more high in trees...
(N) - Vitis cinerea var. baileyanaVitis cinereaVitis cinerea is a variety of grape. It has small black berries that are mildly unpleasant to eat. It grows in Texas. It is also known by the name "Winter Grape"....
(N) - Vitis labruscaVitis labruscaVitis labrusca is a species of grapevines belonging to the Vitis genus in the flowering plant family Vitaceae. The vines are native to the eastern United States and are the source of many grape cultivars, including Catawba and Concord grapes, and many hybrid grape varieties such as Agawam,...
(N) - Vitis ripariaVitis ripariaVitis riparia Michx, also commonly known as River Bank Grape or Frost Grape, is a native American climbing or trailing vine, widely distributed from Quebec to Texas, and Montana to New England. It is long-lived and capable of reaching into the upper canopy of the tallest trees...
(N) - Vitis vulpinaVitis vulpinaVitis vulpina is a herbaceous perennial vine of the family Vitaceae . The genus name Vitis comes from the Latin word for "vine" and the species name vulpina comes from the Latin word for "fox-like" or belonging to a fox...
(N) - Vittaria appalachiana (N)
- Vulpia bromoidesVulpia bromoidesVulpia bromoides, Brome Fescue, is a grass species native to Europe, North Africa, and Asia Minor. It has been introduced to North America, the Hawaiian Islands, Puerto Rico and other places...
(I) - Vulpia myurosVulpia myurosVulpia myuros, or Rat’s-tail Fescue, is an annual grass species of the genus Vulpia. It was probably originally native to Eurasia, but it can now be found nearly worldwide as a naturalized species....
(I) - Vulpia octoflora var. glaucaVulpia octofloraVulpia octoflora Vulpia octoflora Vulpia octoflora (Pullout grass, Sixweeks fescue, Sixweeks grass, Eight-flower sixweeks grass, Eight-flowered fescue; syn. Festuca octoflora Walter var...
(N)
W
- Waldsteinia fragarioides ssp. fragarioidesWaldsteinia fragarioidesWaldsteinia fragarioides , also called Barren strawberry, is a low, spreading plant with showy yellow flowers that appear in early spring...
(N) - Wisteria floribundaWisteria floribundaWisteria floribunda, the Japanese wisteria, is a woody liana of the Wisteria family. It was brought from Japan to the United States in 1860 by George Rogers Hall. Since then, it has become one of the most highly romanticized flowering garden plants...
(I) - Wisteria frutescens (N)
- Wolffia borealisWolffia borealisWolffia borealis is a species of flowering plant known by the common name northern watermeal. It is native to North America including sections of Canada and the United States. It grows in mats on the surface of calm water bodies, such as ponds. It is a very tiny plant with no leaves, stems, or roots...
(N) - Wolffia brasiliensisWolffia brasiliensisWolffia brasiliensis is a species of flowering plant known by the common name Brazilian watermeal. It is native to North and South America, where it grows in mats on the surface of calm water bodies, such as ponds. It is a very tiny plant with no leaves, stems, or roots...
(N) - Wolffia columbianaWolffia columbianaWolffia columbiana is a perennial aquatic plant in the Duckweed family . This plant is distributed widely throughout North, Central, and South America, and also occurs in Curaçao....
(N) - Wolffiella gladiata (N)
- Woodsia ilvensisWoodsia ilvensisWoodsia ilvensis, commonly known as Oblong Woodsia, is a fern found in North America and northern Eurasia. Also known as Rusty Woodsia or Rusty Cliff Fern, it is typically found on sunny, exposed cliffs and rocky slopes and on thin, dry, acidic soils.-Distribution:Its distribution is circumpolar...
(N) - Woodsia obtusa ssp. obtusaWoodsia obtusaWoodsia obtusa is a common rock fern of Appalachia and eastern North America. It prefers a calcareous substrate, but also grows in neutral soils. It may grow on rock faces or in scree....
(N) - Woodwardia areolataWoodwardia areolataWoodwardia areolata is a species of fern native to eastern North America. It is usually treated in the genus Woodwardia, but sometimes transferred to the monotypic genus Lorinseria as Lorinseria areolata C.Presl, on the basis of its anastamosing veins and lobed frond form, as well as its more...
(N) - Woodwardia virginica (N)
X
- Xanthium spinosumXanthium spinosumXanthium spinosum is a species of flowering plant in the aster family known by many common names, including spiny cocklebur and prickly burweed. It is known worldwide as a noxious weed that grows in many types of disturbed habitat. Its original native range is not known but it may have come from...
(I) - Xanthium strumarium var. canadenseXanthium strumariumXanthium strumarium is a species of annual plants belonging to the Asteraceae family...
(N) - Xanthium strumarium var. glabratumXanthium strumariumXanthium strumarium is a species of annual plants belonging to the Asteraceae family...
(N) - Xanthorhiza simplicissima (N)
- Xyris difformis var. difformis (N)
- Xyris torta (N)
Z
- Zannichellia palustrisZannichellia palustrisZannichellia palustris, , is a plant found in fresh to brackish waters in the United States , Europe, and South America. It is recognizable by its long, thread like leaves, and "stringy" appearance. Its roots are also long and tendril-like, and its seeds bear a distinctive horned shape, hence the...
(N) - Zanthoxylum americanumZanthoxylum americanumZanthoxylum americanum, the Common Prickly-ash, Common Pricklyash, Common Prickly Ash or Northern Prickly-ash , is an aromatic shrub or small tree native to central and eastern portions of the United States and Canada...
(N) - Zea mays ssp. mays (I)
- Zelkova serrataZelkova serrataZelkova serrata is a species of Zelkova native to Japan, Korea, eastern China, and Taiwan. It is often grown as an ornamental tree, and used in bonsai.-Description:...
(I) - Zigadenus elegans ssp. glaucusZigadenus elegansMountain Deathcamas is also known as Elegant Camas or "alkali grass". It is not a grass , but belongs to the trillium family, Melanthiaceae....
(N) - Zizania aquatica var. aquatica (N)
- Zizania palustris var. interior (N)
- Zizia aptera (N)
- Zizia aureaZizia aureaZizia aurea is a flowering perennial forb of the carrot family . Golden Alexanders is hardy in USDA zones 4-9...
(N)