A month ago, at the Seattle Hempfest, there was a guy there selling two types of cacti. I recognized the San Pedro, but there was another that I didn't recognize, and I asked him about it and he said that it was a Totem Pole Cactus. I asked him for more information about it, and he said that it wasn't very well known, but the cactus has an active chemical that is similar to Mescaline (I believe he called it Buferin, but I'm not sure). He said that most of those that know of it are natives.
Now I don't know if he was full of shit or not, but I haven't been able to find any information on this cactus' psychoactivity, or anything at all on the chemical Buferin (if I remember and am spelling correctly). He could very well have been full of shit, but I'm still curious to see if any of you know anything about this.
If it helps, I think the scientific name is Lophocereus Schottii Monstrose.