Ariocarpus Trigonus is a subspecies of Ariocarpus Retusus. it is distinguished by it smooth tubercles, which are curved inward like devil's horns. These seeds will produce plants with yellow flowers that form late in the season. Trigonus is distributed primarily throughout Tamaulipas and Nuevo Leon, Mexico. It enjoys full sun and limestone.
Ariocarpus retusus is one of many varieties of cacti and succulents known as living rocks, a term coined for their ability to blend into their surroundings. Retusus is the largest, fastest-growing and easiest to cultivate of the ariocarpus genus, making it one of the most popular among rare cacti collectors. Like fissuratus, retusus has a large taproot below the ground and is occasionally grafted to faster-growing stocks such as pereskiopsis, san pedro or blue myrtle that can drastically speed up growth.
Ariocarpus retusus was known as “tsuwiri,” meaning false peyote, by the Huichols. In their long journeys to find and partake in peyote rituals, they believe that those who were impure or evil would be led by the sprits to find tswiri rather than peyote and would go on to suffer madness upon ingesting the false peyote.