azurescens

Psilocybe azurescens is a species of mushroom in the family Hymenogastraceae. It contains the psychoactive compounds psilocybin and psilocin and is considered among the most potent naturally occurring psilocybin mushrooms. The species name derives from the blue staining that occurs when the flesh is bruised.

Cap is variable, typically 2–6 cm across, hemispherical when young, expanding to convex to plane, with a viscid, pale to dark brown surface; bruises blue when handled. Gills are adnate to sinuate, initially pale then purplish-brown as spores mature. Stem is long, up to 15 cm, thick, and often shows strong blue staining after injury; odor and taste are farinaceous.

Endemic to coastal areas of the Pacific Northwest, including Oregon, southwestern Washington, and occasionally northern California. It grows in decaying wood, wood chips, and nutrient-rich soil in coastal dunes and forested areas, typically fruiting in fall to winter in temperate climates.

Contains psilocybin, psilocin, and other tryptamines; the potency is high relative to many other psilocybin-containing species, thus even small amounts can produce strong psychedelic effects, including visual changes, altered sense of time, and philosophical experiences. Adverse effects may include nausea, anxiety, and dizziness.

Legal status varies worldwide; in many jurisdictions, possession and distribution are illegal. As with other psychedelic mushrooms, misidentification with toxic look-alikes and potential health risks warrant cautious handling and harm-reduction awareness.