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Starha R. 
“Alkaloids of three 'Peyote' cacti”. 
Physica-Chemia. 1994;141(2):71-4.
Ten alkaloids have been identified in extract* of Mexican "peyote" cacti Aztekium ritieri Boed,. Epithelantha micromeris (Engelm.) Weber, Pelecyphora aselliformis Ehrenberg.

Several species of cacti have been reported to be medicinal, inebriating or poisonous. One of the well known plant is the "peyote" cactus. which is used as a hallucinogen and amulet by Mexico's Indians. In this time, Lophophora williamsii (Lem.) Coult. is known as a "peyote" (peyotl). However. Indians designate as a peyotl other cactus species too - Ariocarpus. Aztekium, Epithelantha, Obregonia. Pelecyphora etc. Phytochemical investigation of Lophophora sp. has shown the presence more than 55 phenethylamines (PHA) and tetrahydroisoquinolines (THIQ).

Aztekium ritieri Boed. is a small cactus from Mexico. The Tarahumare Indians use A. ritteri as the narcotics. Chemical studies apparently have not yet been carried out on this cactus.

The same Indians likewise value Epithelantha micromeris (Engelm.) Weber as a narcotic. Between them are E. micromeris known as "mutato" and E. micromeris var. gregii as "rosorapa" too. Lactones have been previously isolated from E. micromeris.

Pelecyphora aselliformis Ehrenberg from the state San Luis Potosi, Mexico is one of the plant which additional common name is "peyote" and "peyotillo" (little peyote) may perhaps refer to similar physiological effects to Lophophora. Previous work reported the identification of anhalidine (2-methyl-6,7-dimethoxy-8-hydroxy-l ,2,3,4-tetrahydroisoquinoline) and hordenine (N,N-dimethylphenethylamine).

Aztekium ritteri, Epithelantha micromeris and Pelecyphora aselliformis have been investigated with perspect to contained psychotomimetic alkaloids.
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