Mammillaria schwarzii
It is endemic to Mexico.Mammillaria schwarzii is a species of plant in the Cactaceae family. It is endemic to Mexico. Its natural habitat is hot deserts. Source - * Fitz Maurice, W.A. & Fitz Maurice, B. 2002. Mammillaria schwarzii. 2006 IUCN Red List of Threatened Species. Downloaded on 22 August 2007. Stub icon This Cactaceae article is a stub. More