Alnus, genus Alnus - alders

alder - wood of any of various alder trees; resistant to underwater rot; used for bridges etc

Alnus glutinosa, Alnus vulgaris, common alder, European black alder - medium-sized tree with brown-black bark and woody fruiting catkins; leaves are hairy beneath

Alnus incana, gray alder - native to Europe but introduced in America

Alnus maritima, seaside alder - shrub or small tree of southeastern United States having soft light brown wood

Alnus rhombifolia, white alder, mountain alder - tree of western United States

Alnus rubra, Oregon alder, red alder - large tree of Pacific coast of North America having hard red wood much used for furniture

Alnus rugosa, speckled alder - common shrub of Canada and northeastern United States having shoots scattered with rust-colored down

Alnus serrulata, hazel alder, smooth alder - common shrub of the eastern United States with smooth bark

Alnus veridis, green alder - shrub of mountainous areas of Europe

Alnus crispa, Alnus veridis crispa, green alder - North American shrub with light green leaves and winged nuts

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