Fibrous Hat

Inocybe haemacta is a rare psilocybin-producing members of the large “fibrous hat” Inocybe genus. Because this genus includes 1400 species of edible, psychoactive and poisonous mushrooms mixed, it has the reputation of making identification dangerously tricky; it is therefore strongly advised to not ingest these from the wild.

Inocybe haemacta, like Inocybe corydalina and Inocybe coelestium, is a mycorrhizal mushroom, meaning he has a symbiotic relationship with plants. It inherits its name “haemacta” from the distinct pinkish undertones and pinkish bruising reaction.

Inocybe haemacta is a mildly hallucinogenic magic mushroom widespread throughout Europe yet rarely reported in the Netherlands and the British Isles, where it is most probable they are sought after. It is believed to be more widely distributed than present-day data suggests. The only data we found on the specimen reported higher amounts of baeocystin than psilocybin and no psilocin. For other unusual compound levels creating unique entourage effect have a look at Inocybe aeruginascens,

Visual Description

"• Cap: 1.4-6.5 cm broad. Obtusely conic to obtusely convex, becoming broadly convex to nearly plane in age, sometimes uplifted in advanced age, with or without an umbo. Coloration greenish gray to dark grayish green with a pinkish brown underlayer. Lighter at margin, darker at disk. Surface is dry with radially arranged fibrillose that can be greenish gray to dark gray green. Flesh white to greenish, pinkish when bruised. • Gills: narrow, adnate and weakly attached to the stem. Colored grayish to pale grayish brown. Often with olive tones, staining reddish near edges, turning reddish brown with age. • Stem: 17-85 mm long, 3-10 mm thick. Equal, narrowing at base, solid with thin hair. Color when young is bright pink near apex, grayish green at base, soon darkening to nearly black in age. Partial veil often leaving fragile fibrillose remnant on margin when young. • Spore print: clay brown • Microscopic features: 8-11.5 x 5-6.5 µ"


MILD < 0.25% 0.17% psilocybin, no psilocin, 0.34 baeocystin (Stijve and Kuyper 1985)

Habitat Origin

"Widespread throughout Europe but rarely reported in the Netherlands and the British Isles. Grows in clay soils in plains, soils enriched with debris or sometimes underneath deciduous woods (oaks and beeches). It is believed to be more widely distributed than present-day data."


Said to be relatively rare and considered a type of oddity in the wide collection of psychedelic fungi. Psilocybe authority Stamet doesn't advise its consumption by the would-be psychonaut.

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