We located Lophophora fricii growing on this rocky mountainside not too far from Viesca, Coahuila.
    This is the montane subtaxon of the species.

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This species, despite its rough resemblence to Lophophora williamsii, is not hallucinogenic.
    Whereas L. williamsii contains mescaline as its major alkaloid, L. fricii contains only traces of mescaline which are pharmacologically inactive.

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