Origin: Native
Conservation Status: Not of concern
[none provided]
Occurring east of the Cascades crest in southeastern Washington; southeastern Washington to California, east to Montana, Idaho, New Mexico, Texas, and South Dakota.
Occurring east of the Cascades crest, where endemic to the Columbia River region of central Washington.
Occurring west of the Cascades crest, where endemic to the Olympic Mountains.PNW Herbaria: Specimen records of Petrophytum in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Petrophytum checklist entry
OregonFlora: Petrophytum information
E-Flora BC: Petrophytum atlas page
CalPhotos: Petrophytum photos