Psilocybe azurescens is a potent psychoactive basidiomycete fungus in the family Hymenogastraceae, renowned for having one of the highest concentrations of psilocybin and psilocin among all known mushrooms. Morphologically, it features a conic to convex cap that flattens with age, often retaining a distinct broad umbo (central bump). The cap is hygrophanous, shifting from a rich caramel or chestnut brown when moist to a pale straw color as it dries, and is covered by a separable gelatinous pellicle. A defining characteristic is its intense bluing reaction; the tissues bruise dark indigo to black almost immediately upon handling due to the oxidation of psilocin.
Native: Oregon Coast (Columbia River Delta), Washington Coast. Introduced: Germany, Netherlands, New Zealand, California, British Columbia. Naturally rare and localized to the Pacific Northwest, but successfully naturalized in outdoor wood chip beds in temperate regions worldwide.
No strains cataloged yet for this species.
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