The Arizona fishhook cactus (also known as Graham's nipple cactus) is not only limited to Arizona, but is  also found in California, New Mexico and Texas, as well as much of Northern Mexico. One of the most interesting things about this particular native species of the Sonoran and Chihuahuan Deserts are the recurved "fishhook" spines. This one was found in Southern Arizona's Diablo Mountains near the Mexican border.