Native to Alberta, Arizona, British Columbia, California, Colorado, Idaho, Montana, Nevada, New Mexico, North Dakota, Oregon, South Dakota, Utah, Washington, Wyoming (source: POWO). Flora of the World documents 2 occurrences across 1 country.
Location
United States, Idaho, Owyhee (Hammett)
42.904333, -115.692611
Location Remarks
Bruneau Canyon Scenic Overlook, 25 km south of Bruneau (ssmall town) on Hot Springs Rd., then 5 km west on unnamed road (Scenic overlook sign) to the canyon rim. 2240 m elev.
Collectors
Christopher Davidson, Sharon R. Christoph, Roy E. Gereau, Charlotte M. Taylor
Notes
Mixed conifer forest, mostly Douglas fir. Sandy, gravelly soil on roadside bank.
Location
United States, Idaho, Custer (Stanley)
44.149139, -114.916833
Location Remarks
Redfish Lake
Collectors
Christopher Davidson, Sharon R. Christoph, Roy E. Gereau, Charlotte M. Taylor
Notes
Steep, coarse basalt scree slope south above the road.