genus Alnus

hamamelid dicot genus - genus of mostly woody relatively primitive dicotyledonous flowering plants with flowers often unisexual and often borne in catkins

Betulaceae, birch family, family Betulaceae - monoecious trees and shrubs (including the genera Betula and Alnus and Carpinus and Corylus and Ostrya and Ostryopsis)

alder tree, alder - north temperate shrubs or trees having toothed leaves and conelike fruit; bark is used in tanning and dyeing and the wood is rot-resistant

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, grey 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