Psilocybe guilartensis

Jump to: navigation, search
Psilocybe guilartensis
Scientific classification
Kingdom: Fungi
Division: Basidiomycota
Class: Agaricomycetes
Order: Agaricales
Family: Strophariaceae
Genus: Psilocybe
Species: P. guilartensis
Binomial name
Psilocybe guilartensis
Guzmán, F. Tapia & Nieves-Riv.

Error: Image is invalid or non-existent.

Psilocybe guilartensis
mycological characteristics:
Gills icon.png 
gills on hymenium
Convex cap icon.svg 

cap is conical or convex

hymenium is adnexed

stipe is bare

spore print is purple-brown

ecology is saprotrophic

edibility: psychoactive

Psilocybe guilartensis is a psilocybin mushroom which has psilocybin and psilocin as main active compounds. It is common in Puerto Rico.

Gaston Guzman placed P. guilartensis in Psilocybe section Brunneocystidiatae due to its blue staining reaction, small thick walled subrhomboid spores and pigmented cystidia. [1]


  • Cap: 1-3 cm diameter, at first subconical to campanulate, expanding to plano-convex with an umbo. Cap surface dark violet brown, translucent-striate near the margin, hygrophanous, fading to tan as it dries. Staining blue-green to black where bruised.
  • Gills: Cream color when young, violet brown or chocolate brown in age, with adnexed attachment.
  • Spores: Dark violet brown, subrhomboid in face view, subellipsoid in side view, thick walled, 6 x 5 um.
  • Stipe: Central, equal with subbulbous base, hollow and cylindric, 3 to 8 cm long, 1 to 2 mm thick. Whitish to brown, ornamented with small flattened scales towards the base. The base is covered in tiny yellow fibers which help distinguish this from similar species. Staining blue-green to black where bruised.
  • Taste: Farinaceous, sometimes with a slight mustard taste.
  • Odor: Farinaceous, sometimes with a slight mustard odor.
  • Microscopic features: Pigmented cheilocystidia and pleurocystidia present. Basidia four spored. Clamp connections common.

Distribution and habitat

Grows gregariously in groups, often on disturbed bare clay or moss. Found along hiking trails, in coffee plantations, tropical and subtropical forests, especially in landslide areas. Known only from Puerto Rico and Dominican Republic. [1]

External links