[Evening-primroses, Sun Cups and Yellow Cups: The Genus Camissonia (and Chylismia and Eremothera) in the Southwestern Deserts of the United States]

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.