Living Rock, Seven Stars, Chaute, Chautle, Peyote Cimarrón, Tsuwíri

This species and all subspecies are on the endangered/protected species list.
The 'retusus' subspecies has a gray-green or blue-gr...Read Moreeen epidermis and the tubercles are not curved sharply and not sharply pointed in relation to the other subspecies. It's flowers are white or pinkish-white. This is the most common of the subspecies.
The 'trigonus' subspecies usually has a yellow-green epidermis and the tubercles are more pointed and incurved. It does not have areole pads at the tubercle tips like 'retusus'. The flowers are yellow or cream colored.
The 'furfuraceus' variety has a darker green-brown-gray epidermis and more obese tubercles.

Here are other forms/varieties or tenative subspecies still under scrutiny:
Ariocarpus retusus subsp. scapharostroides
Ariocarpus retusus subsp. horacekii [syn. A. elongatus subsp. horacekii]
Ariocarpus retusus subsp. jarmilae
Ariocarpus retusus subsp. panarottoi