| Mammillaria, Cactus, Mammillaria albicoma, Mammillaria pennispinosa, Mammillaria surculosa|Mammillaria schwarzii Wikipedia
Mammillaria schwarzii is a species of plant in the Cactaceae family.
It is endemic to Guanajuato state in Mexico. Its natural habitat is hot deserts.
Thought to be extinct for some time, it was rediscovered in 1987.