San Diego County, California, US
Possibly Eremothera boothii condensata Booth Primrose. Other possibility is Eremothera refracta.
Species from western North America
Common name: Desert Lantern, Booth's evening primrose
Photographed along the edge of the overflow camping section of the Sunset Campground, Furnace Creek, Death Valley National Park, California
This is such a variable flower. This one is probably C. boothii decorticans.