Distribution: Known only from Okanogan County in Washington; Alaska south to California, east to the northern Rocky Mountains; circumpolar.
Habitat: Alpine areas, typically where moist.
Flowers: June-August
Origin: Native
Growth Duration: Annual
Conservation Status: Threatened in Washington (WANHP)
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PNW Herbaria: Specimen records of Comastoma tenellum in the Consortium of Pacific Northwest Herbaria database.
WA Flora Checklist: Comastoma tenellum checklist entry.
E-Flora BC: Comastoma tenellum atlas page.
CalPhotos: Comastoma tenellum photos.
USDA Plants: Comastoma tenellum information.