Native to the northern hemisphere:  🇪🇺 Europe, Asia, and western 🇨🇦 Canada and 🇺🇸 USA.  Part of alder  genus Alnus and alder / birch / hazel / hornbeam  family Betulaceae and bayberry / beech / birch / oak / walnut  order Fagales.

Different subspecies specialize in different areas, including:

Uses by native peoples
(Ethnobotany database)   Alnus hosts caterpillars of 267 species
of butterflies and moths, in some areas.

Learn more about ◼ green alder Alnus viridis

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