Distribution: Occurring east of the Cascades crest in Washington, where known from Yakima County; central Oregon to California, east to the Rocky Mountains.
Habitat: Dry, open, generally rocky places at lower elevations.
Flowers: May-July
Origin: Introduced
Conservation Status: Not of concern
[none provided]
PNW Herbaria: Specimen records of Pleiacanthus spinosus in the Consortium of Pacific Northwest Herbaria database.
WA Flora Checklist: Pleiacanthus spinosus checklist entry.
E-Flora BC: Pleiacanthus spinosus atlas page.
CalPhotos: Pleiacanthus spinosus photos.
USDA Plants: Pleiacanthus spinosus information.