Mammillaria guillauminiana

Mammillaria guillauminiana is a species of plant in the family Cactaceae.

Distribution
The cactus is endemic to northwestern Mexico, in Durango and Sinaloa states.

The species grows in desert scrub habitat, in humus between rocks and in shady places, at 1300 - 1800 m in elevation.

It was classified on the IUCN Red List as extinct in the wild until rediscovered in 2003. It has been reclassified by IUCN as a Data Deficient species.