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.

The saguaro cactus is a distinctive icon ... Most of their elaborate root systems develop just 4 to 6 inches below the ground and spread out as wide as the cactus is tall to maximize the plants’ ...

Saguaro cactuses tower over Arizona's desert landscape, each year inching higher and higher for hundreds of years as they watch time pass. While they can grow to unique heights, one cactus holds ...