Ariocarpus retusus
Date: 1996 November 4
Location: San Luis Potosí
The following two pictures show a different form of
Ariocarpus retusus, with long slender grey-greenish
tubercles (more towards A. trigonus), but with the
typical retusus terminal areole.
You should be able to spot 3 plants on the first picture,
at top-right, mid-left, and bottom-right.
Ariocarpus retusus
Date: 1996 November 7
Location: San Luis Potosí