young plant carnegiea gigantea and cylindropuntia bigelovii in organ pipe np, arizona

cylindropuntia bigelovii ajo mountain drive arborescent arid arizona barrell cactaceae cactoideae cactus carnegiea gigantea caryophyllales cereus giganteus chain fruit cholla desert succulents dry echinocereeae engelmann 039 prickly pear eudicots ferocactus wislizenii flora hardy hot landscape learn about the park nature north america opuntia fulgida organ pipe pilocereus plant rock saguaro national sonoran spine teddy bear tree treelike usa vegetation wild wilderness nacti