Cactus #
Saguaro - Carnegiea gigantea #
Tall, solitary column with pleated ribs and a few upward arms.
Organ Pipe Cactus - Stenocereus thurberi #
Many slender uniform stems emerging right at ground level.
Giant cardon - Pachycereus pringlei #
Multiple large arms; can form candelabra or clump.
