peyote

(pā-ōˈtē) also pe·yo·tl (-ōtˈl)

1. A spineless, dome-shaped cactus (Lophophora williamsii) native to Mexico and the southwest United States, having buttonlike tubercles that are chewed fresh or dry as a narcotic drug by certain Native American peoples. Also called mescal.
2. See mescal button.
3. See mescaline.