Saguaro National Park, AZ / Saguaro Cacti (Carnegiea gigantea) at sunset in the Tucson Mountains West unit. 799V12

Saguaro National Park, AZ / Tucson Mountains. Tangled Fishhook cactus (Mammillaria microcarpa) in full bloom. 82000V3

Saguaro National Park, AZ / Prickly Pear cactus (Opuntia phaeacantha) fruit drenched during summer "monsoon" rains in the Sonoran Desert. 72001V4