Psilocybe cyanescens, commonly known as the Wavy Cap, is a potent saprotrophic mushroom belonging to the family Hymenogastraceae. It is renowned for its distinctive hygrophanous cap, which matures from a convex, caramel-brown form into a broadly plane shape with a deeply undulating, wavy margin. The cap surface is viscid when moist and fades to a pale buff or yellowish-ochre upon drying. A defining characteristic is its intense bluing reaction; nearly all parts of the fruit body, particularly the stem and cap margin, stain dark blue to blue-green when bruised or handled, indicating high concentrations of psilocin.
Native: Pacific Northwest (USA/Canada), Central Europe (debated origin). Introduced: United Kingdom, Germany, Netherlands, New Zealand, West Asia (Iran). Rapidly expanding worldwide, largely driven by the commercial distribution of wood chip mulch which transports the mycelium to new urban environments.
No strains cataloged yet for this species.
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