Tim Fitzharris / Organ Pipe Cactus (Stenocereus thurberi), Ajo Mountains, Organ Pipe Cactus National Monument, Arizona

Tim Fitzharris / Cactii in desert, Ajo Mountains, Organ Pipe Cactus National Monument, Arizona

Tim Fitzharris / Senita Cactus (Pachycereus schottii) group, Ajo Mountains, Organ Pipe Cactus National Monument, Arizona

Tim Fitzharris / Saguaro (Carnegiea gigantea) and Ajo Mountains, Organ Pipe Cactus National Monument, Arizona

Tim Fitzharris / Saguaro (Carnegiea gigantea) and Teddybear Cholla (Cylindropuntia bigelovii) amid flowering Lupine and California Brittlebush (Encelia californica), Arizona

Tim Fitzharris / Ajo Mountains, Organ Pipe Cactus National Monument, Sonoran Desert, Arizona