Distribution: Occurring east of the Cascades crest in Washington from Kittitas County to the east end of the Columbia River Gorge; central Washington to north-central Oregon.
Habitat: Moist, open slopes and woodlands in the foothills.
Flowers: March-June
Origin: Native
Growth Duration: Perennial
Conservation Status: Not of concern
Pollination: Bumblebees
[none provided]
Publication: Amer. Midl. Naturalist 27(3): 726. 1942.
PNW Herbaria: Specimen records of Hydrophyllum capitatum var. thompsonii in the Consortium of Pacific Northwest Herbaria database.
WA Flora Checklist: Hydrophyllum capitatum var. thompsonii checklist entry.
OregonFlora: Hydrophyllum capitatum var. thompsonii information.
E-Flora BC: Hydrophyllum capitatum var. thompsonii atlas page.
CalPhotos: Hydrophyllum capitatum var. thompsonii photos.
USDA Plants: Hydrophyllum capitatum var. thompsonii information.
