Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains and Great Plains.
Habitat: Moist woods from sea level to mid-elevations in the mountains.
Flowers: April-June
Origin: Native
Growth Duration: Perennial
Conservation Status: Not of concern
Pollination: Bumblebees, wasps, wind
Shrub or small tree 1-10 m. tall; stems glabrous, the bark grayish to reddish-purple.
Leaves opposite, glabrous to sparsely glandular-puberulent, 2-14 cm. long and nearly as broad, cordate, palmately 3-5 lobed, coarsely serrate, paler on the lower surface.
Plants monoecious to dioecious, staminate flowers with only rudiments of a pistil, but pistillate flowers with well-developed, though not always fertile, stamens; flowers about 8 mm. broad, in flat-topped clusters in the leaf axils; sepals usually 5; petals equal in size and number, or lacking; stamens usually 10, inserted on the outer edge of a lobed disk; styles and stigmas 2; ovary superior, 2-celled.
Samaras 2.5-3 cm. long, the wings not divergent.
Publication: Ann. Lyceum Nat. Hist. New York ii. 172. 1828.
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var. douglasii – Douglas maple
Occurring on both sides of the Cascades crest in Washington; British Columbia to Oregon, east to Idaho and Montana,
PNW Herbaria: Specimen records of Acer glabrum in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Acer glabrum checklist entry
OregonFlora: Acer glabrum information
E-Flora BC: Acer glabrum atlas page
CalPhotos: Acer glabrum photos
