Evening-primrose

• Alpine Willowherb
  Epilobium anagallidifolium
  Epilobium anagallidifolium is a species of willowherb known by the common names pimpernel willowherb and alpine willowherb. This small flowering plant has a circumboreal distribution and can be found in mountain ranges further south, where grows in alpine climates. It is a perennial found in low...
  
  , Epilobium anagallidifolium
• California Willowherb
  Epilobium foliosum
  Epilobium foliosum is a species of flowering plant in the evening primrose family known by the common names Leafy Willowherb and California Willowherb...
  
  , Epilobium foliosum
• Clavate-fruit Willowherb
  Epilobium clavatum
  Epilobium clavatum is a species of flowering plant in the evening primrose family known by the common names Talus Willowherb and Clavatefruit Willowherb. It is native to western North America from Alaska to northern California to Colorado, where it grows in rocky high mountain habitat such as talus...
  
  , Epilobium clavatum
• Deceptive Groundsmoke, Gayophytum decipiens
• Dense Spike-primrose
  Epilobium densiflorum
  Epilobium densiflorum is a species of willowherb known by the common names Denseflower Willowherb, Dense Spike-primrose or Dense Boisduvalia. It is native to western North America from British Columbia to Baja California, where it is found in a variety of habitats. This is an erect annual often...
  
  , Epilobium densiflorum
• Diamond Clarkia
  Clarkia rhomboidea
  Clarkia rhomboidea is a species of wildflower known by the common names diamond clarkia and forest clarkia. This plant is native to western North America, where it is a common resident of varied forest and woodland habitats. This clarkia grows a spindly stem not exceeding a meter in height and...
  
  , Clarkia rhomboidea
• Diffuse Groundsmoke
  Gayophytum diffusum
  Gayophytum diffusum is a species of flowering plant in the evening primrose family known by the common name spreading groundsmoke. It is native to western North America where it is a common member of many different habitats. This is a spindly, branching annual herb reaching a maximum height of...
  
  , Gayophytum diffusum
• Dwarf Fireweed, Epilobium latifolium
• Fireweed, Epilobium angustifolium
• Fringed Willowherb, Epilobium ciliatum ssp. ciliatum
• Fringed Willowherb, Epilobium ciliatum ssp. glandulosum
• Glandular Willowherb
  Epilobium halleanum
  Epilobium halleanum is a species of flowering plant in the evening primrose family known by the common name glandular willowherb. It is native to parts of western North America from British Columbia to New Mexico, where it grows in many types of habitat. It is an erect perennial herb growing up to...
  
  , Epilobium halleanum
• Glaucous Willowherb
  Epilobium glaberrimum
  Epilobium glaberrimum is a species of willowherb known by the common name glaucous willowherb. This clumping perennial wildflower is native to western North America from central Canada to northern Mexico. It generally grows at some elevation in moist places. This plant is somewhat variable in...
  
  , Epilobium glaberrimum
• Hairy Evening-primrose, Oenothera villosa
• Hairy Willowherb
  Epilobium ciliatum
  Epilobium 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...
  
  , Epilobium ciliatum
• Hooker's Evening-primrose
  Oenothera elata
  Oenothera elata is a plant of the genus Oenothera known by the common name Hooker's evening primrose. Its subspecies include hookeri, hirsutissima and elata. It is native to much of western and central North America....
  
  , Oenothera elata
• Hornemann's Willowherb, Epilobium hornemannii
• Large-flower Clarkia
  Clarkia pulchella
  Clarkia 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...
  
  , Clarkia pulchella
• Linear-leaved Willowherb, Epilobium palustre var. gracile
• Long-leaf Evening-primrose
  Camissonia subacaulis
  Taraxia subacaulis is a species of evening primrose known by the common name diffuseflower evening primrose. It is native to the western United States, where it grows in several habitat types, especially in mountainous areas. It is a fleshy perennial herb growing from a taproot and usually lacking...
  
  , Camissonia subacaulis
• Long-tubed Evening-primrose, Oenothera flava
• Low Groundsmoke
  Gayophytum humile
  Gayophytum humile is a species of flowering plant in the evening primrose family known by the common name dwarf groundsmoke. It is native to western North America from Alberta to California, and can also be found in parts of South America. It lives in many types of mountain habitats, especially...
  
  , Gayophytum humile
• Marsh Willowherb
  Epilobium palustre
  Epilobium palustre is a species of willowherb known by the common name marsh willowherb. This plant has a circumboreal distribution, and can be found farther south in mountainous areas. This is a hairy perennial growing spindly stems sometimes exceeding half a meter in height. Its stems have...
  
  , Epilobium palustre
• Marsh Willowherb, Epilobium palustre var. palustre
• Much-branch Groundsmoke, Gayophytum ramosissimum
• Naked-stemmed Evening-primrose, Camissonia scapoidea
• Obscure Evening-primrose
  Camissonia andina
  Neoholmgrenia andina is a species of evening primrose known by the common name Blackfoot River evening primrose. It is native to western North America, including southern Canada and much of the western United States, where it is a plant of mountains, and sagebrush plateaus. It is a small annual...
  
  , Camissonia andina
• Oregon Willow-herb
  Epilobium oregonense
  Epilobium oregonense is a species of flowering plant in the evening primrose family known by the common name Oregon Willowherb. It is native to western North America from British Columbia to Arizona, where it generally grows in moist places in several types of habitat...
  
  , Epilobium oregonense
• Pale Evening-primrose, Oenothera pallida ssp. pallida
• Panicled Willowherb
  Epilobium brachycarpum
  Epilobium brachycarpum is a species of willowherb known by the common names Tall Willowherb, Tall Annual Willowherb, Panicled Willowherb and Tall Fireweed. It is native to and widespread in North America, where it is a resident of varied open and woodland habitats. It has also been introduced to...
  
  , Epilobium brachycarpum
• Prairie Evening-primrose, Oenothera albicaulis
• Racemed Groundsmoke, Gayophytum racemosum
• Rocky Mountain Willowherb, Epilobium saximontanum
• Scarlet Gaura
  Gaura coccinea
  Gaura coccinea is a species of flowering plant in the evening primrose family known by several common names, including scarlet beeblossom, scarlet gaura, and linda tarde. It is native to much of North America, especially the western and central sections. It can be found in many habitats, and is...
  
  , Gaura coccinea
• Short-flower Evening-primrose, Camissonia breviflora
• Shrubby Willowherb, Epilobium suffruticosum
• Slender-fruited Willowherb, Epilobium leptocarpum
• Small Camissonia
  Camissonia parvula
  Camissonia parvula is a species of evening primrose known by the common name Lewis River suncup. It is native to the Great Basin of the United States. It grows in sagebrush, woodland, and other Great Basin habitat. It is a slender annual herb producing a wiry erect stem 15 to 30 centimeters in...
  
  , Camissonia parvula
• Small Enchanter's-nightshade, Circaea alpina
• Small Enchanter's-nightshade, Circaea alpina ssp. alpina
• Small Enchanter's-nightshade, Circaea alpina ssp. pacifica
• Small Sundrops
  Oenothera perennis
  Oenothera perennis, or Sundrops, is a herbaceous flowering plant native to the United States and Canada....
  
  , Oenothera perennis
• Small-flower Willowherb
  Epilobium minutum
  Epilobium minutum is a species of willowherb known by the common names Chaparral Willowherb and Desert Willowherb. It is also called "smallflower willowherb", however that name, in particular the British English variant "Small-flowered Willowherb", typically refers to Epilobium parviflorum.This...
  
  , Epilobium minutum
• Small-flowered Evening-primrose, Camissonia minor
• Smooth Spike-primrose
  Epilobium pygmaeum
  Epilobium pygmaeum is a species of willowherb known by the common names Pygmy Willowherb and Smooth Boisduvalia. This plant is native to western North America from Baja California to Saskatchewan. It is a resident of vernal pools and mudflats. This is an annual rarely reaching half a meter in height...
  
  , Epilobium pygmaeum
• Tansy-leaf Evening-primrose
  Camissonia tanacetifolia
  Taraxia tanacetifolia is a species of evening primrose known by the common name tansyleaf evening primrose. It is native to the western United States, particularly the Great Basin and the mountains of the Pacific Northwest. It is a perennial herb growing from a woody taproot and spreading via...
  
  , Camissonia tanacetifolia
• Tufted Evening-primrose
  Oenothera caespitosa
  Oenothera caespitosa, known commonly as tufted evening primrose and fragrant evening primrose, is a perennial plant of the genus Oenothera native to much of western and central North America...
  
  , Oenothera caespitosa
• Velvet-leaved Gaura
  Gaura parviflora
  Gaura parviflora is a species of Gaura native to the central United States and northern Mexico, from Nebraska and Wyoming south to Durango and Nuevo Leon.It is an annual plant growing to 0.2–2 m tall, unbranched, or if branched, only below the flower...
  
  , Gaura parviflora
• White-flower Willowherb
  Epilobium lactiflorum
  Epilobium lactiflorum is a species of willowherb known by the common name Milkflower Willowherb or Whiteflower Willowherb. This plant is found throughout northern North America and northern Eurasia, where it most often grows in moist, rocky areas at some elevation...
  
  , Epilobium lactiflorum
• White-stemmed Evening-primrose, Oenothera nuttallii
• Yellow Evening Primrose, Calylophus serrulatus

Loosestrife

• Purple Loosestrife, Lythrum salicaria
• Scarlet Ammannia
  Ammannia robusta
  Ammannia 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...
  
  , Ammannia robusta
• Toothcup
  Rotala ramosior
  Rotala 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...
  
  , Rotala ramosior
• Winged-loosestrife
  Lythrum alatum
  Lythrum 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:...
  
  , Lythrum alatum