Lophophora williamsii /loʊˈfɒfərə wɪlˈjæmsiaɪ/ or peyote (/pəˈjoʊti/) is a small, spineless cactus with psychoactive alkaloids, particularly mescaline. The English common name peyote comes from the like-spelled Spanish name, which in turn comes from the Nahuatl name peyōtl [ˈpejoːt͡ɬ], said to be derived from a root meaning "glisten" or "glistening".