Psilocybe pintonii

Psilocybe pintonii Guzmán



Macroscopic feat.:
  • Cap/Pileus: 15-40 mm diam., subconvex co subumbonate or subpapillate, sometimes irregularly lobulate, eventually appianate or subconcave, smooth, but when young covered by white fibrils from the veil; sometimes slightly rimose, lubricous to dry, slightly transparently striate when moist, hygrophanous, brownish to orange brown or chocolate brown, fading to a dirty yellow.
  • Gills/Lamellae: Sinuate or adnate, brownish to gray violet, thick with whitish to concolorous edges.
  • Stem/Stipe: 25-60 x 3-5 mm, cylindrical, hollow, whitish to subconcolorous with the pileus, covered toward the base by floccose white veil fibrils; base remaining somewhat blackish in dried specimens. Both pileus and stipe stain green-blue when injured. Veil well developed when young but absent in the adult stage.
  • Context: Whitish to brownish, fleshy in the pileus, fibrous-hard in stipe; staining blue when cut, with farinaceous odor and taste.

Microscopic feat.:
  • Basidio/Spores: (6-) 6.6-7.7 (-8.8) x (3.3-) 4-4.5 µm, ellipsoid or subelliptic, somewhat subrhomboid in face view, thin walled, smooth, brownish yellow.
  • Basidia: 16-22 x 4.4-8 µm, four-spored, cylindric-pyriform, sometimes sinuos-pyriform.
  • Pleurocistidia: Absent.
  • Cheilocystidia: 17-20 x 4-7 µm, hyaline, ventricose-fusoid, lageniform, irregularly ventricose with constrictions or branched or with capitate to subcapitate apex, mixed with basidia in different stages of deformation.
  • Subhymenium: Brownish without incrusting pigment, but with thick irregular walls in the hyphae; these 6-25 µm.
  • Epicutis: Subgelatinized, formed by hyaline elongated and parallel hyphae 3-5 µm broad.
  • Hypodermium: With hyphae with reddish brownish 4-8 µm broad.

Habitat: Solitary or gregarious on soil without herbaceous vegetation, in páramos with Espeletia, at 3450-3600 m elevation.

Studied material: COLOMBIA, Cundinamarca Dept, Páramo de Palacio, Hacienda La Siberia, road La Calera to La Mina, near the branch to Rincón del Oso, Aug. 20, 1964, Guzmán 9160 (ENCB); July 23, 1971, Guzmán 9762 (Holotype COL; Isotype ENCB).

Discussion: This species is close to Psilocybe zapotecorum Heim and Psilocybe muliercula Sing. & Smith, and certainly belongs to the same group, but the special cheilocystidia separate it well from the other species. Because of the bluing reaction and the farinaceous odor and taste, this is probably a hallucinogenic species, but there is no information about its use. The same situation holds true for Psilocybe columbiana.

source - www.mycotaxon.com [7 (2): 247-248]

Pictures at www.mushroomobserver.org

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