1) Cactus 2) Carnegiea gigantea 3) Saguaro 1) Saguaro 
(Carnegiea) This group consists of only one, giant cactus native to the southwestern U.S. and northwest Mexico. C. gigantea (Candelabra Cactus; Giant Cactus; and Saguaro or Sahuaro) is one of the largest of the Cactus family. In the wild, the Saguaro Cactus usually forms large colonies. It is a home to many birds and is popularly used as scenery in...