Alnus viridis subsp. sinuata is called Sitka alder.  Alnus viridis subsp. crispa is called 🗻︎ mountain alder.

Native to the northern hemisphere:  🇪🇺 Europe, Asia, and western 🇨🇦 Canada and 🇺🇸 USA.  Different subspecies specialize in different areas.

Uses by native peoples
(Ethnobotany database) Genus used as host by caterpillars of 267 species
of 🦋 butterflies and moths, in some areas.

Learn more about green alder Alnus viridis

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