Cephalocereus senilis, the old man cactus, is a species of cactus native to Guanajuato and Hidalgo in eastern Mexico. It is threatened in the wild, but widespread propagation and popularity in cultivation have reduced the demand on wild populations.
The cactus Cephalocereus senilis (Old Man Cactus) is an odd-looking plant that needs a place in every indoor cactus collection or in an outdoor cactus garden given the right climate. Their unkempt cactus with white hair makes them a real standout in any setting. These interesting Mexican natives are fairly hardy and easy to grow, and it is endangered in its native habitat in eastern Mexico. In the wild, they live for up to 200 years.