a tall perennial woody plant having a main trunk and branches forming a distinct elevated crown; includes both gymnosperms and angiosperms

a genus of trees of the family Betulaceae (such as birches)

hard close-grained wood of any of various birch trees; used especially in furniture and interior finishes and plywood

an abundant, naturally occurring triterpene; it is commonly isolated from the bark of birch trees and forms up to 30% of the dry weight of the extractive.

tree of eastern North America with thin lustrous yellow or grey bark

small American birch with peeling white bark often worked into e.g. baskets or toy canoes

medium-sized birch of eastern North America having white or pale grey bark and valueless wood; occurs often as a second-growth forest tree

European birch with silvery white peeling bark and markedly drooping branches

European birch with dull white to pale brown bark and somewhat drooping hairy branches

a genus of trees of the family Betulaceae (such as birches)

hard close-grained wood of any of various birch trees; used especially in furniture and interior finishes and plywood

a slightly sweet, thin syrupy-watery liquid extracted from a birch tree.

an abundant, naturally occurring triterpene; it is commonly isolated from the bark of birch trees and forms up to 30% of the dry weight of the extractive.