Sweet Birch
Encyclopedia
Betula lenta is a species of birch
native to eastern North America
, from southern Maine
west to southernmost Ontario
, and south in the Appalachian Mountains
to northern Georgia
.
tree
reaching 20 m tall with a trunk up to 60 cm diameter. In younger trees the bark is characteristic of most Birches with smooth bark and horizontal fissures. It can sometimes be mistakenly identified as a Cherry tree. In some older tree specimens the bark
can (unlike most birches)develop vertical cracks into irregular scaly plates revealing rough darkish brown bark patterns. This however, does not occur in all specimens. The twigs, when scraped, have a strong scent of oil of wintergreen
. The leaves
are alternate, ovate, 5-10 cm long and 4-8 cm broad, with a finely serrated margin. The flower
s are wind-pollinated catkin
s 3-6 cm long, the male catkins pendulous, the female catkins erect. The fruit
, maturing in fall, is composed of numerous tiny winged seed
s packed between the catkin bracts.
The sap flows about a month later than maple
sap, and much faster. The trees can be tapped in a similar fashion, but must be gathered about three times more often. Birch sap
can be boiled the same as maple sap, but its syrup is stronger (like molasses
).
Betula lentas leaves serve as food for some lepidoptera
n caterpillars. See List of Lepidoptera that feed on birches.
Birch
Birch is a tree or shrub of the genus Betula , in the family Betulaceae, closely related to the beech/oak family, Fagaceae. The Betula genus contains 30–60 known taxa...
native to eastern North America
North America
North America is a continent wholly within the Northern Hemisphere and almost wholly within the Western Hemisphere. It is also considered a northern subcontinent of the Americas...
, from southern Maine
Maine
Maine is a state in the New England region of the northeastern United States, bordered by the Atlantic Ocean to the east and south, New Hampshire to the west, and the Canadian provinces of Quebec to the northwest and New Brunswick to the northeast. Maine is both the northernmost and easternmost...
west to southernmost Ontario
Ontario
Ontario is a province of Canada, located in east-central Canada. It is Canada's most populous province and second largest in total area. It is home to the nation's most populous city, Toronto, and the nation's capital, Ottawa....
, and south in the Appalachian Mountains
Appalachian Mountains
The Appalachian Mountains #Whether the stressed vowel is or ,#Whether the "ch" is pronounced as a fricative or an affricate , and#Whether the final vowel is the monophthong or the diphthong .), often called the Appalachians, are a system of mountains in eastern North America. The Appalachians...
to northern Georgia
Georgia (U.S. state)
Georgia is a state located in the southeastern United States. It was established in 1732, the last of the original Thirteen Colonies. The state is named after King George II of Great Britain. Georgia was the fourth state to ratify the United States Constitution, on January 2, 1788...
.
Characteristics and habitat
It is a medium-sized deciduousDeciduous
Deciduous means "falling off at maturity" or "tending to fall off", and is typically used in reference to trees or shrubs that lose their leaves seasonally, and to the shedding of other plant structures such as petals after flowering or fruit when ripe...
tree
Tree
A tree is a perennial woody plant. It is most often defined as a woody plant that has many secondary branches supported clear of the ground on a single main stem or trunk with clear apical dominance. A minimum height specification at maturity is cited by some authors, varying from 3 m to...
reaching 20 m tall with a trunk up to 60 cm diameter. In younger trees the bark is characteristic of most Birches with smooth bark and horizontal fissures. It can sometimes be mistakenly identified as a Cherry tree. In some older tree specimens the bark
Bark
Bark is the outermost layers of stems and roots of woody plants. Plants with bark include trees, woody vines and shrubs. Bark refers to all the tissues outside of the vascular cambium and is a nontechnical term. It overlays the wood and consists of the inner bark and the outer bark. The inner...
can (unlike most birches)develop vertical cracks into irregular scaly plates revealing rough darkish brown bark patterns. This however, does not occur in all specimens. The twigs, when scraped, have a strong scent of oil of wintergreen
Methyl salicylate
Methyl salicylate is a natural product of many species of plants. Some of the plants which produce it are called wintergreens, hence the common name.-Botanical background:...
. The leaves
Leaf
A leaf is an organ of a vascular plant, as defined in botanical terms, and in particular in plant morphology. Foliage is a mass noun that refers to leaves as a feature of plants....
are alternate, ovate, 5-10 cm long and 4-8 cm broad, with a finely serrated margin. The flower
Flower
A flower, sometimes known as a bloom or blossom, is the reproductive structure found in flowering plants . The biological function of a flower is to effect reproduction, usually by providing a mechanism for the union of sperm with eggs...
s are wind-pollinated catkin
Catkin
A catkin or ament is a slim, cylindrical flower cluster, with inconspicuous or no petals, usually wind-pollinated but sometimes insect pollinated . They contain many, usually unisexual flowers, arranged closely along a central stem which is often drooping...
s 3-6 cm long, the male catkins pendulous, the female catkins erect. The fruit
Fruit
In broad terms, a fruit is a structure of a plant that contains its seeds.The term has different meanings dependent on context. In non-technical usage, such as food preparation, fruit normally means the fleshy seed-associated structures of certain plants that are sweet and edible in the raw state,...
, maturing in fall, is composed of numerous tiny winged seed
Seed
A seed is a small embryonic plant enclosed in a covering called the seed coat, usually with some stored food. It is the product of the ripened ovule of gymnosperm and angiosperm plants which occurs after fertilization and some growth within the mother plant...
s packed between the catkin bracts.
Uses
Betula lenta was used commercially in the past for production of oil of wintergreen before modern industrial synthesis; the tree's name reflects this scent of the shoots.The sap flows about a month later than maple
Maple
Acer is a genus of trees or shrubs commonly known as maple.Maples are variously classified in a family of their own, the Aceraceae, or together with the Hippocastanaceae included in the family Sapindaceae. Modern classifications, including the Angiosperm Phylogeny Group system, favour inclusion in...
sap, and much faster. The trees can be tapped in a similar fashion, but must be gathered about three times more often. Birch sap
Birch sap
Birch sap is the sap extracted from a birch tree, such as a North American Sweet Birch or a Silver Birch. The sap is often a slightly sweet, thin syrupy-watery liquid...
can be boiled the same as maple sap, but its syrup is stronger (like molasses
Molasses
Molasses is a viscous by-product of the processing of sugar cane, grapes or sugar beets into sugar. The word molasses comes from the Portuguese word melaço, which ultimately comes from mel, the Latin word for "honey". The quality of molasses depends on the maturity of the sugar cane or sugar beet,...
).
Betula lentas leaves serve as food for some lepidoptera
Lepidoptera
Lepidoptera is a large order of insects that includes moths and butterflies . It is one of the most widespread and widely recognizable insect orders in the world, encompassing moths and the three superfamilies of butterflies, skipper butterflies, and moth-butterflies...
n caterpillars. See List of Lepidoptera that feed on birches.