Teddy Bear Cholla (Opuntia bigelovii) and Saguaro Cacti (Carnegiea gigantea) lit by the afternoon light in the Sand Tank Mountains, Sonoran Desert National Monument, Arizona, USA  ,  ATMOSPHERIC,CACTI,CACTUS,DESERTS,LANDSCAPES,MOUNTAINS,north america,NORTH AMERICA,PLANTS,RESERVE,SHRUBS,USA  ,  Jack Dykinga