Booth's Sun Cup, Pine Creek Evening Primrose
Eremothera boothii ssp. alyssoides
Synonyms: Camissonia boothii ssp. alyssoides, Oenothera alyssoides
Booth's sun cup blooming on the sandy wash of Hawk Canyon, Anza-Borrego Desert State Park........March 24, 2011.
One of the subspecies of Booth's sun cup as seen in a wash along the east side of the Mojave Valley Highway 95 a mile or two north of Pintail Slough in the Havasu National Wildlife Refuge...........February 20, 2013.
Paul Slichter