Cephalocereus senilis  Cephalocereus senilis is commonly known as the old man cactus because of the grayish hairs that protect it from the harsh sun common to its native habitat in eastern Hidalgo, Mexico. Mexico is an important center of diversity for the Cactus Family, containing more than five hundred species and possessing the highest number of endemic and endangered cacti of any country in the world. Though wild populations of Cephalocereus senilis are still considered vulnerable, widespread propagation of this species by commercial nurseries catering to cactus hobbyists has greatly reduced the demand for plants collected from naturally-occurring populations. |
