Mountain alder is a common name for two different alders:
- Alnus alnobetula subsp. crispa — the green alder, native to western North America.
- Alnus incana subsp. tenuifolia — the grey alder or thinleaf alder, native to western North America.
This page is an index of articles on plant species (or higher taxonomic groups) with the same common name (vernacular name).
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