Distribution: Endemic to Chelan and Douglas counties in Washington.
Habitat: Common on dry, grassy hillsides just below the ponderosa pine woodlands.
Flowers: May-June
Origin: Native
Growth Duration: Perennial
Conservation Status: Threatened in Washington (WANHP)
Pollination: Bumblebees, bees, butterflies, flies
[none provided]
PNW Herbaria: Specimen records of Trifolium thompsonii in the Consortium of Pacific Northwest Herbaria database.
WA Flora Checklist: Trifolium thompsonii checklist entry.
OregonFlora: Trifolium thompsonii information.
E-Flora BC: Trifolium thompsonii atlas page.
CalPhotos: Trifolium thompsonii photos.
USDA Plants: Trifolium thompsonii information.