Coryphantha (from Greek, "flowering on the top"), or "beehive cactus", is a genus of small to middle-sized, globose or columnar cacti. It is closely related to genus Mammillaria. The genus is native to arid parts of Central America, Mexico, through Arizona, New Mexico, and western Texas and north into southwestern, central, and southeastern Montana. With its two subgenera, 57 species and 20 subspecies, it is one of the largest genera of cactus. Synonyms: Cumarinia Buxb. and Lepidocoryphantha Backeb.