Alnus viridis subsp. sinuata
Native to (or naturalized in) Oregon:
- Recent studies have shown that Sitka Alder is part of a circumpolar alder group (Alnus viridis) distributed across America, Europe, and Asia. This species has been separated into two subspecies, namely (1) A. viridis supsp. crispa - Green Alder - northern North America, including the Northwest, and (2) A. viridis subsp. sinuata - Sitka alder.
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