Plant habit on the Soldier Trail, Santa Catalina Mountains, Pima County, Arizona, 21 Mar 2010.
Flowers on the Soldier Trail, 21 Mar 2010.
Plant habit in the Ajo Mountains, Organ Pipe Cactus National Monument, 5 Feb 2005.
A flower in the Ajo Mts., 5 Feb 2005.
Plant habit in the Franklin Mountains, El Paso County, Texas, 12 Mar 2005.