Alnus alnobetula is a common tree widespread across much of Europe, Asia, and North America. Many sources refer to it as Alnus viridis, the green alder, but botanically this is considered an illegitimate name synonymous with Alnus alnobetula subsp. fruticosa.
Alnus alnobetula subsp. alnobetula - Europe; naturalized in New Zealand
Alnus alnobetula subsp. fruticosa (Rupr.) Raus - Siberia, Russian Far East, northern China, Alaska, Yukon, Northwest Territories, British Columbia, Saskatchewan, Washington, ...
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* Tota la informació es basa en investigacions científiques publicades