A floristic account is provided for the cactus family as part of the vascular plant flora of the contiguous protected areas of Organ Pipe Cactus National Monument, Cabeza Prieta National Wildlife Refuge, and the Tinajas Altas Region in the heart of the Sonoran Desert in southwestern Arizona. The modern native cactus flora includes 35 taxa in 12 genera, plus 2 non-native prickly- pears that are not established in the flora area.
Photo of a Nichol Turk's Head Cactus in the Waterman Mountains in Arizona.
This deformity effects many cactus and is fairly rare.
These photos are of Echinomastus erectocentrus var. erectocentrus (Needle-Spined Pineapple Cactus) near Vail, AZ.
A mesquite nurse tree over-run by saguaros near Tubutama, Sonora.
This cactus has a very limited distribution and is an Endangered Species. It survives in a narrow elevational zone from the upper Sonoran Desert into the Chapparal (sometimes Madrean Evergreen Woodland) that occurs in its range. Its range covers areas east of Superior, AZ in Gila and Pinal counties.
Here is a selection of photos of individual Echinocereus triglochidiatus var. arizonicus (Arizona Hedgehog) cactus, all taken in the wild.
The Arizona hedgehog cactus, Echinocereus triglochidiatus var. arizonicus, was officially given Endangered status by the U.S. Fish and Wildlife Service under the Endangered Species Act of 1973 on October 25, 1979 (44 FR 61556). The taxon as considered here is known from only a few locations near the boundary between Gi1a and Pina1 counties, Arizona. The range lies between the towns of Miami and Superior.