Mescaline Mescaline Mescaline (3,4,5-trimethoxyphenethylamine) is a naturally occurring psychedelic alkaloid of the phenethylamine class, known for its hallucinogenic effects comparable to those of LSD and psilocybin. It occurs naturally in the peyote cactus ("Lophophora williamsii"), the San Pedro cactus ("Echinopsis pachanoi"), the Peruvian torch ("Echinopsis peruviana"), and other members of the Cactaceae plant family. It is also found in small amounts in certain members of the Fabaceae (bean) family, including "Acacia berlandieri". However those claims concerning Acacia species have been challenged and have been unsupported in additional analysis. Peyote has been used for at least 5,700 years by Native Americans in
Psychoactive plant a few examples of significant psychoactive plants and their effects are shown. For further examples, see List of psychoactive plants. In the plant kingdom (Plantae), almost all psychoactive plants are found within the flowering plants (angiosperms). There are many examples of psychoactive fungi, but fungi are not part of the plant kingdom. Some important plant families containing psychoactive species are listed below. The listed species are examples only, and a family may contain more psychoactive species than listed. The active constituents of the majority of psychoactive plants fall within the alkaloids ("e.g.", nicotine, morphine, cocaine, mescaline, caffeine, ephedrine), a class