This Abaeis or Eurema nicippe suprised me. I found it along Cactus Spring Trail, where I'd never seen one before. Possibly just passing through; Senna species are not on the trail to my knowledge but there are records of Senna covesii along highway 74 on Calflora. April 22, 2017.
A Sleepy Orange, Abaeis nicippe, near Cottonwood Spring in Joshua Tree National Park, an excellent place to find this butterfly. This is the Spring form. March 29, 2009.
Abaeis nicippe - at Boyce Thompson Arboretum in Arizona in the Fall. Sept. 25, 2007.
The larva of Abaeis nicippe on one of the hosts, Senna armata. This was given to me by Gordon Pratt and photographed on May 16, 2020. I drove to Yucca Valley for the desert senna.