Page author: David Giblin
Alnus incana ssp. tenuifolia
mountain alder

Distribution: Occurring chiefly east of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains.

Habitat: Moist places, streamsides, and avalanche chutes from low to middle elevations.

Flowers: March-May

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern

Pollination: Wind


[none provided]

Accepted Name:
Alnus incana (L.) Moench ssp. tenuifolia (Nutt.) Breitung
Publication: Amer. Midl. Naturalist. 58: 25. 1957.

Synonyms & Misapplications:
Alnus incana (L.) Moench var. occidentalis (Dippel) C.L. Hitchc. [HC]
Alnus incana (L.) Moench var. virescens S. Watson
Alnus occidentalis Dippel
Alnus ×purpusii Callier
Alnus rugosa (Du Roi) Spreng. var. occidentalis (Dippel) C.L. Hitchc.
Alnus tenuifolia Nutt. [VPBC1]
Alnus tenuifolia Nutt. var. occidentalis (Dippel) Collier [VPBC, VPBC]
Additional Resources:

PNW Herbaria: Specimen records of Alnus incana ssp. tenuifolia in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Alnus incana ssp. tenuifolia checklist entry.

OregonFlora: Alnus incana ssp. tenuifolia information.

E-Flora BC: Alnus incana ssp. tenuifolia atlas page.

CalPhotos: Alnus incana ssp. tenuifolia photos.

USDA Plants: Alnus incana ssp. tenuifolia information.

36 photographs:
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