Psilocybe heliconiae

Psilocybe heliconiae Guzmán, Saldarriaga, Pineda, Garcí et Velázquez

Macroscopic feat.:
  • Cap/Pileus: 20-30 mm in diam., subcampanulate, subumbonate, lubricous, glabrous, even to striate at the margin, brownish to chocolate brown, finally straw color, hygrophanous.
  • Gills/Lamellae: Sinuate, yellowish, grayish brown to violet brown, with whitish edges.
  • Stem/Stipe: 35-45 x 4-5 mm, pale brown to yellowish brown, cylindric, slightly thickened at the base, somewhat flexuous, hollow or stuffed of white mycelium, subpruinose to floccose with whitish scales toward the base.
  • Context: Context whitish under the pileus, brownish in the stipe. All parts staining blue green when injured. KOH negative or stains the pileus pale brownish.
  • Odor: And taste farinaceous.

Microscopic feat.:
  • Basidio/Spores: 5-6.5 (-7.5) x 4-6 µm, subrhomboid or subellipsoid in face view, subellipsoid in side view, thick-walled, yellowish brown, with a broad germ pore.
  • Basidia: 18-20 x 5-6 µm, 2-, 3 or 4-spored, hyaline, ventricose with a median constriction.
  • Pleurocistidia: (11-) 14-17 x 5-7 (-9) µm, hyaline, subglobose or ventricose.
  • Cheilocystidia: (18-) 19-22 (-24) x (4-) 5-6 µm, abundant, hyaline, sublageniform, ventricose-fusoid or sometimes submoniliform, with a short neck or slightly mucronate at apex.
  • Epicutis: A subgelatinous layer, 80 µm thick, with subparallel hyaline hyphae of 2-3 µm in diam.
  • Trama: Gill trama parallel, with hyaline hyphae. Clamp connections present.

Habitat: Solitary or caespitose, on soil in tropical rain forest, at 500-1000 m alt. Known only from the regions of Nariño and Caquetá in Department Antioquía, at Colombia. One of the studied specimens brought from Caquetá (Parra & Echeverry 2), grew at a flowerpot with (Heliconia) in a greenhouse in Medellín.

Studied material: COLOMBIA, Departamento Antioquia, Nariñ region, Puente Linda, Sept. 15, 1990, G. Parra s.n. (holotype HUA, isotype XAL) Caquetá region, Aug. 30, 1990, G. Parra & B. Echeverry 2 (HUA, XAL).

Discussion: The form and size of the pleurocystidia separate this species from Psilocybe wrightii Guzmán and Psilocybe brasiliensis Guzmán, the former only known from central Argentina and the second from the Sao Paulo Region in Brazil (Guzmán, 1983). These species including Psilocybe heliconiae belong to Sect. Cordispora.

source - [51: 229-230]

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