A saguaro cactus is a tough cactus with huge roots. It's tough outer layer helps keep water in, and the huge roots help it gather water.
This is one of them.
 |
| source |
As I said, bushes can survive there. A good example is sagebrush. This plant lets the wind uproot it, then it spreads seeds as it blows around. These seeds grow into new plants which do the same thing.
Here is one.
 |
| source |
