The peyote cactus, or Lophophora williamsii, is unassuming at first glance. It’s small and spineless, unlike other cacti. But inside the small buttons that grow from the plant lies a hallucinogenic ...

Peyote is a small, button shaped cactus native to Mexico and southern parts of the United States. Potent compounds in peyote, such as mescaline, cause it to have a hallucinogenic effect in humans.