Psilocybe microcystidiata

Psilocybe microcystidiata Guzmán & Bononi

Psilocybe zapotecorum Heim emend Guzmán
Psilocybe aggericola Singer & A.H. Sm.
Psilocybe barrerae Cifuentes & Guzmán
Psilocybe subzapotecorum Guzmán
Psilocybe chaconii Guzmán, M. Torres & Ram.-Guill.
Psilocybe bolivarii Guzmán, Ciencia (Méx.)
Psilocybe zapotecorum var. ramulosum
Psilocybe sanctorum
Psilocybe sanctorum Guzmán
Psilocybe candidipes Singer & A.H. Sm.
Psilocybe aggericola var. alvaradoi
Psilocybe zapotecorum f. elongata
Psilocybe pseudozapotecorum Guzmán

Macroscopic feat.:
  • Cap/Pileus: 7-10 mm diam., conic to campanulate, subviscid, glabrous and smooth to slightly striate at the margin, reddish brown or darker, hygrophanous.
  • Gills/Lamellae: Subadnate, violaceous brown, with whitish floccose edges.
  • Stem/Stipe: 25-30 x 1-2 mm, uniform to somewhat bulbous at the base, brownish to reddish brown, covered by small whitish floccose scales. Annulus absent.
  • Context: Thin, brownish, bluing.

Microscopic feat.:
  • Basidio/Spores: (5.5-) 6-7 x 3-3.5 (-4) µm, ellipsoid or subellipsoid, both in frontal and lateral view, thin walled, brownish, with a broad germ pore.
  • Basidia: 10-15 x 4-5 µm, 4-spored, hyaline, subcylindric or ventricose.
  • Pleurocistidia: 10-21 (-24) x 7-10 (-12) µm, abundant, hyaline to somewhat yellowish brown, fusiform, ventricose, globose or napiform.
  • Cheilocystidia: 8-13 x 1,5-3 µm, necks 0.5-1 µm; thick, hyaline, regular or irregularly sublageniform.
  • Subhymenium: With elongated elements strongly pigmented on the walls with irregularly incrusted brown pigment, hyphae up to 15 µm diam.
  • Hypodermium: As in the subhymenium.
  • Trama: Regular, incrusted to hyaline. Pileus surface with elongated parallel hyphae, somewhat incrusted as those of the subhymenium. Clamp connections observed.

Habitat: Gregarious on soil, only know from the type locality.

Studied material: BRAZYL, Minas Gerais State, Pouso Alegre, Col. Pedro Küpper, December 1982 (SP-178161 Type).

Discussion: This species belongs to the Section Zapotecorum because of the structure of the spores and the bluing feature of the fruit body (Guzmán, 1983). It differs from all the species of the Section in its small cheilocystidia, smaller even than those recently described in the same Section (Guzmán, 1982; Cifuentes & Guzmán, 1981) from Mexico.

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