Distribution: Occurring east of the Cascades crest in Washington, where endemic to Chelan and Kittitas counties.
Habitat: Open, rocky slopes and ponderosa pine forest openings, from low to middle elevations.
Flowers: May-June
Origin: Native
Growth Duration: Perennial
Conservation Status: Not of concern
[none provided]
PNW Herbaria: Specimen records of Lomatium thompsonii in the Consortium of Pacific Northwest Herbaria database.
WA Flora Checklist: Lomatium thompsonii checklist entry.
OregonFlora: Lomatium thompsonii information.
E-Flora BC: Lomatium thompsonii atlas page.
CalPhotos: Lomatium thompsonii photos.
USDA Plants: Lomatium thompsonii information.