Photos of dorsal and ventral views can be found at Butterflies of America
Very like Alexandra Sulphur above, but apparently no white female form. Below like Clouded Sulphur, except discal spot below often (usually?) without a small satellite spot. Orange sulphur with wings somewhat different in shape, usually with orange above, dark borders wide and prominent on both males and females, more "smooth" scaling below, nearly always with satellite spot, and white females common.
Southern California, coastal ranges, south to northern Baja California.
Chaparral, woodland clearings
February-May and from June-August (two flights).
Larvae feed on Rattleweed, Astragalus douglasii.
Queen Alexandra's Sulphur - Colias alexandra