I have a book called "Peyote and Other Psychoactive Cacti" by Adam Gottlieb (sp?). It says that Ariocarpus fissuratus is reported to have 10 times the potency of true peyote. Not sure if this is a fact or what, but I'd be extremely interested if someone did a bioassay on this plant. I have 2 in my garden right now, not for ingestion, (well, maybe one day ;) ) but for preservation. I am learning how to hand pollinate right now, so I can get some viable seed. I'm in the Southern U.S., so hopefully, I'll have some good seed to spread around!