About Coryphantha pycnacantha (Mart.) Lem.
Coryphantha pycnacantha (Mart.) Lem. is a species of cactus that is endemic to central Mexico. It is native to the Mexican states of Hidalgo, Puebla, Tlaxcala, and Veracruz. This cactus grows on deep lava soils, and it is classified as an Endangered species on the IUCN Red List.