Mescaline and its Important It is a naturally occurring psychedelic compound found in several cacti species. Most notably in the peyote cactus (Lophophora williamsii). The San Pedro cactus (Echinopsis pachanoi), and the Peruvian torch cactus (Echinopsis peruviana). It has a long history of use in Native American religious and spiritual rituals and is known for […]