This type of cactus is known as ball cactus (although some authorities call it a hedgehog cactus) that is originally from the desert southwest of North America. It grows on dry mountain valleys, rocky ridges. This cactus is listed on the Federal Endangered Species list.
Pediocactus simpsonii was first named by George Engelmann for army engineer James H. Simpson under the name Echinocactus simpsonii. Simpson led an expedition in Colorado, and Engelmann named the species “in honor of the gallant commander” of the expedition
These flowers are born in the center of the cactus and are usually a brilliant pink, but can sometimes be whitish in color.