genus Alnus

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Noun1.genus Alnus - aldersgenus Alnus - alders          
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
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The genus Alnus (Betulaceae) consists of about 35 species of deciduous trees and shrubs.