Psilocybe farinacea

Psilocybe farinacea Rick ex Guzmán, sp. nov.


synonyms:
Psilocybe albofimbriata (Rick) Singer

Macroscopic feat.:
  • Cap/Pileus: 20-40 (-80) mm diam., convex to subcampanulate, smooth but slightly striate at the margin, subviscid to dry, brownish to brownish reddish or straw color.
  • Gills/Lamellae: Adnate or sinuate, brownish violaceous or brownish chocolate, with whitish edges or concolorous.
  • Stem/Stipe: 35-65 (-80) x 3-8 cm, cylindrical, uniform or subbulbous, hollow, whitish to brownish, smooth or with floccose fibrils at the apex, veil remnants, staining blue when injured. Veil arachnoid, white to violaceous, but not forming an annulus on the stipe.
  • Context: Whitish, staining blue when cut.
  • Odor: And taste farinaceous.

Microscopic feat.:
  • Basidio/Spores: 7.5-9 (-10.5) x 5.2-7.5 x 3-4 µm, subrhomboid in face view, elliptic in side view, thick walled brownish yellowish and with a broad basal germ pore.
  • Basidia: 10-15 x 7-8 µm, two or four-spored, vesiculose, hyaline.
  • Pleurocistidia: None.
  • Cheilocystidia: 22-33 x 5-7.5 µm, vesiculose-fusiform with more or less long necks 2-3 µm diam., hyaline, forming a sterile band along the edge of the gill.
  • Subhymenium: And trama brownish, with collapsed hyphae.
  • Epicutis: Subgelatinized formed by parallel hyaline hyphae.
  • Hypodermium: Brownish with elongated hyphae, 8-10 µm diam. Clamp connections scarce.

Habitat: Gregarious on soil. Known only from the type locality.

Studied material: BRAZIL, Sao Leopoldo, May 1908, Rick (Holotype, Lloyd Herb. 27598; BPI).

Discussion: Psilocybe farinacea is very close to Psilocybe caerulescens Murr., but differs in the size of the spores and cheilocystidia. This species was named by Rick and sent to Lloyd but, apparently, was never described. Its bluing indicates that this species probably is hallucinogenic.

source - www.mycotaxon.com [7 (2): 241]

Pictures at www.mushroomobserver.org

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