Psilocybe azurescens is a recently described hallucinogenic mushroom that is reportedly the most potent psilocybin mushroom known (Stamets 1996; Paul Stamets, in litt. 2011). Recent scientific investigations into controlled clinical uses for psilocybin have shown promise for both psychiatric applications (e.g., Grob et al. 2011) and in probing the psychology and neuropharmacology of mystical experiences (e.g., Griffiths et al. 2008). For a broad review of Psilocybe mushrooms, see Stamets (1996); for a briefer introduction (that includes more recent literature references), see Beug (2011).
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