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

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

Betula alleghaniensis, Betula leutea, yellow birch - tree of eastern North America with thin lustrous yellow or gray bark

American white birch, Betula cordifolia, Betula papyrifera, canoe birch, paper birch, paperbark birch - small American birch with peeling white bark often worked into e.g. baskets or toy canoes

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

Betula pendula, common birch, European white birch, silver birch - European birch with silvery white peeling bark and markedly drooping branches

Betula pubescens, downy birch, white birch - European birch with dull white to pale brown bark and somewhat drooping hairy branches

Betula nigra, red birch, river birch, black birch - birch of swamps and river bottoms throughout the eastern United States having reddish-brown bark

Betula lenta, black birch, cherry birch, sweet birch - common birch of the eastern United States having spicy brown bark yielding a volatile oil and hard dark wood used for furniture

Betula neoalaskana, Yukon white birch - Alaskan birch with white to pale brown bark

Betula fontinalis, mountain birch, swamp birch, water birch, Western birch, Western paper birch - birch of western United States resembling the paper birch but having brownish bark

American dwarf birch, Betula glandulosa, Newfoundland dwarf birch - small shrub of colder parts of North America and Greenland

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