Mescaline, or peyote , which comes from the cactus Lophophora
williamsii ; psilocin and psilocybin, from the mushrooms Psilocybe
mexicana and Stropharia cubensis ; and LSD , synthesized from
lysergic acid, found in the fungus Claviceps purpurea). These
alkaloids have also been produced synthetically. Newer
hallucinogens, such as PCP (phencyclidine, or "angel dust" ), a
drug originally used as an anesthetic, and MDMA ( "Ecstasy" ), an
amphetamine derivative, were common in the 1980s. Marijuana has
hallucinogenic properties but is pharmacologically distinct.