Psilocybin-containing mushrooms growing in Mexico. Brought to prominence by R. Gordon Wassom when he went down there for a little expidition.

Psilocybe mexicana is one of the many species of mushroom containing, in various ratios, the psychoactive indole alkaloids psilocybin, psilocin, baeocystin and other related compounds known as tryptamines. World-wide as many as 130 species have been identified in about a dozen genera. The psilocybes (the "liberty cap", Psilocybe semilanceata, and the Psilocybe Cubinsis) make up a large and well known subset of the family of Magic Mushrooms, while Panaeolus subbalteatus, and Amanita muscaria, or Fly Agaric tend to be less well known.

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