Also called gray alder and Alnus rugosa.

Part of alder  genus Alnus in alder / birch / hazel / hornbeam  family Betulaceae in bayberry / beech / birch / oak / walnut  order Fagales.

Native to the 🌐︎ Northern Hemisphere:  🇪🇺 Europe, Asia, and 🇨🇦 🇺🇸 🇲🇽 North America.   🗺 Map by county (🇺🇸 USA-48) (color key), 🗺 map (North America, Central America).  Adobe Acrobat Reader file   Different subspecies specialize in different areas.  For example, native to western 🇨🇦 🇺🇸 Canada and USA is Alnus incana subsp. tenuifolia, also called 🗻︎ mountain alder and thinleaf alder.

Uses by native peoples
(Ethnobotany database)

Alnus hosts caterpillars of 267 species
of butterflies and moths, in some areas.

Learn more about speckled alder Alnus incana

🔍︎ 🔍︎ images Discover Life Encyclopedia of Life Michigan Flora (Minnesota) Wildflower Garden Minnesota Wildflowers Missouri Botanical Garden Flora of North America USDA PLANTS db USFS Wikipedia

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🏠︎ 🌳︎ broadleaves, ╟ alternate, 🍂︎ simple non-lobed ▲▴▲▴ doubly-toothed