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Definition of Mountain alder
1. Noun. Small shrubby maple of eastern North America; scarlet in autumn.
2. Noun. Tree of western United States.
Exact synonyms: Alnus Rhombifolia, White Alder
Group relationships: Alnus, Genus Alnus
Generic synonyms: Alder, Alder Tree
Group relationships: Alnus, Genus Alnus
Generic synonyms: Alder, Alder Tree