Psilocybe inquilina

Psilocybe inquilina (Fries ex Fries) Bresadola

Deconica inquilina (Fries) Romagn.
Psilocybe ecbola (Fries) Singer
Psilocybe muscorum (P.D. Orton) M.M. Moser 1967


Macroscopic feat.:
  • Cap/Pileus: (0.5) 1-2 cm broad. Hemispheric to convex, expanding to broadly convex to nearly plane to slightly umbonate. Reddish brown to brick brown to tan or yellowish brown, hygrophanous, fading in color to straw. Margin translucent-striate most way to the disc when moist from a separable gelatinous pellicle, becoming opaque in drying, and sometimes decorated with whitish floccose scales.
  • Gills/Lamellae: Attachment adnate to subdecurrent, reddish brown to purplish gray-brown, with concolorous edges.
  • Stem/Stipe: 20-40 mm long by 1.5-2 mm thick. Equal, flexuous, hollow, whitish to reddish brown, adorned with whitish to brown firbils toward the base, which often has whitish mycelium attached. Partial veil cortinate, soon desappearing.

Microscopic feat.:
  • Basidio/Spores: Purplish brown in deposit, 7-8.8 (10) by 4.5-6.6 µm, subrhomboid to subellipsoid in face view, subellipsoid in side view
  • Basidia: 4-spored.
  • Pleurocistidia: Absent.
  • Cheilocystidia: Lageniform to sublageniform, (15) 18-38 na 5-8 µm, with a long neck 2.5-3.8 µm broad.

Habitat: Solitary to gregarious, commonly on the base of grass stems in open areas, occasionally on rotting twigs or in rich soils. A temperate species, Psilocybe inquilina is widely distributed, reported from North America (California, Oregon, and Washington), South America (Argentina, Chile, and Uruguay), and Europe (Denmark, Finland, France, Hungary, Sweden, and Switzerland). Undoubtedly more widely distributed than presently reported.

Comment: Not known to be active. I frequently find Psilocybe inquilina growing from the bases of matted, rotting grass in the fall. The mushrooms are difficult to harvest without either the stems breaking or clumps of dead grass being pulled up with each specimen. This feature, combined with the nearly decurrent gills, the convex cap, and the deeply translucent-striate margins, distinguishes this species macroscopically. See also Psilocybe crobula and Psilocybe montana.

source - Paul Stamets "Psilocybin Mushrooms of the World"

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© psilosophy 2001-2022