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Alnus incana (Grey Alder) is a species of tree in the family Betulaceae. They have a self-supporting growth form. They are native to Eastern North America, Western North America, North America, United States, Saint-Pierre Et Miquelon, The Contiguous United States, Alaska, and Canada. They have simple, simple leaves. Individuals can grow to 12 m.

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EOL has data for 84 attributes, including:

Known occurrences, collected specimens and observations of Grey Alder. View this species on GBIF