[429] Because of the important roles which they played in ceremonial and in daily life, the narcotic plants of ancient Mexico are of especial interest to the anthropologist. Mexico possessed and still possesses many plant narcotics and intoxicants, of which a few are outstanding in their uses and are extremely interesting because of their great antiquity as well as because of the important bearing their use, distribution and history may have on questions of a theoretical nature. Of the most notable, are the toleselo or coral-berry (Sophora secundiflora (Ort.) Lag. ex DC.), ololiuhqui or piule (Rivea corymbosa (L.) Hall. f.), peyote (Lophophora williamsii (Lem.) Coult.), and teonanacatl (Paneolus campanulatus L. var. sphinctrinus (Fr.) Bresadola).