United States, Arizona, Pima, Organ Pipe National Monument, just W of the Monument Headquarters; 4.4 mi N of the AZ, USA-Sonora, Mexico border at Lukeville-Sonoita, along AZ-85
31.903 -112.815
T17N R05E
505 meters
1660ft.
Cereus, Acacia, Larrea
Spines yellow with white sheaths; abundant perennial; ca. 4 ft tall.