DistributionRead full entry
Range DescriptionThere are currently two disjunct subpopulations of this species. The small subpopulation in Querétaro occurs on medium to steep slopes of volcanic rock near Mesa de Léon in a very small area (extent of occurrence is 25 km² and the area of occupancy is less than 10 km²). A new subpopulation has recently been discovered in Zacatecas (not shown on the species' range map to protect it), which is much larger. It grows at altitudes between 1,400 and 1,900 m asl.