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Lophophora williamsii(lō-fof'ŏ-ră wil-yăm'sē-ī),
Cactus; source of peyote (mescal button); it contains over a dozen alkaloids, of which mescaline is the most important; others are pellotine, anhalomine, anhalonidine, anhalamine, anhalinine, anhalidine, and lophophorine.
Herbal medicine A North American cactus, with > 50 distinct alkaloids—mescaline is the most active—and best-known for its hallucinatory effects; it is integral to some Native American tribal rituals in the American southwest, but is otherwise illegal
Substance abuse The flowering heads—mescal buttons—are hallucinogenic Clinical features Minutes after ingestion, euphoria, hallucinations, tachycardia, mydriasis, rarely fever, seizures
n See peyote.