Don Swann and his other biologist colleagues at Saguaro National ... Society and the Tucson Cactus and Succulent Society carefully uncover the delicate roots that fan out in different directions.

Some cacti and succulents have swollen roots that store up water for the ... The Gila woodpecker nests inside the stem of the saguaro cactus where the temperature inside can be up to 30ºC ...

The saguaro cactus is a distinctive icon of the American Southwest ... their survival is dependent on rain. Most of their elaborate root systems develop just 4 to 6 inches below the ground and spread ...