Public Description of Psilocybe brunneocystidiata Guzmán & E. Horak

Title: Public Description (Default)
Name: Psilocybe brunneocystidiata Guzmán & E. Horak
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Description status: Unreviewed

Taxonomic Classification:

Domain: Eukarya
Kingdom: Fungi
Phylum: Basidiomycota
Class: Agaricomycetes
Order: Agaricales
Family: Hymenogastraceae

General Description:

This fungus is closely related to the hallucinogenic and lignicolous P. yungensis SINGER & SMITH described from Bolivia (SINGES & SMITH, 1958) and reported also from Mexico (HEIM & WASSON, 1958); furthermore it is close to P. mammillata MuRill) SMITH, a native species from Jamaica (MURILL, 1918). P. brunneocystidiata differs from the before mentioned two taxa in the brown pleurocystidia and in the well developed veil remnants forming the distinct subpersistent subannulus. Obvious relationships also can be traced to several species recently described by GUZMAN (1977) from tropical forests in Mexico (P. naematolomiformis, P. singeri, P. uxpanapensis, and P. weldenii). All these Mexicans pecies have brown pleurocystidia but are seperated from P. brunneocystidiata by different cheilocystidia. From the taxonomical point of view brown coloured pleurocystidia as observed in some tropical species are considered as a primitive character in Psilocybe (GUZMAN 1977).

Diagnostic Description:

Pileus (3—)9—40 mm diam., conical (when young) to convex or expanded but always with sharp conical papilla, hygrophanous, brown to yellowish brown or stramineous, dry, smooth except of white dense fibrillose squamules from the veil, striate towards the margin. Lamellae broadly adnate to subdecurrent, distant, beige to cocoa brown, edge albofinibriate. Stipe 10—40/1 —2 mm, cylindrical, equal, central, flexuos, dry, hollow, fragile, concolorous with pileus, covered with white squamules from the veil, forming fibrillose subannulus, apex pruinose. Context pale brown in pileus and stipe.

Odour and taste subfarinaceous.

Spore print dark brown.

Spores (5—)6—6,5(—7)/5.5— 6/3.8—4.5 u.m, subrhombic (dorso-ventral) or subelliptical (lateral), yellowish brown (KOH), broad flattened germ pore present, smooth. Basidia 18—24/4.5—6 \j.m, hyaline (KOH), subvesiculose, occasionally with median constriction, 4-spored, sterigma 2—4(—7) u.m long. Pleurocystidia 20—33/ 6.5—9(—11) fxm, hyaline but some brownish (KOH), ventricose- papillate, apical papilla 2—3,5 diam. Cheilocystidia 10—20/ 3—5 [im,1—2.5 |imat apex, hyaline (KOH), polymorphous (ventricose- rostrate, clavate, strangulate or mucronate), forming sterile band along gill edge. Subhymenium of irregular cells, conspicuously encrusted with yellow (KOH) pigment. Trama regular, consisting of elongate cylindrical hyphae, 4,5—8 diam., pigmented like subhymenium. E p i c u t i s a cutis of more or less gelatinized cylindrical hyphae, encrusted with yellow pigment. Subcuticular hyphae like those of the trama. Clamp connections present.

Habitat: Gregarious or cespitose on rotten wood in subtropical forests. Known hosts: Castanopsis acuminatissima and Nothofagus spp. Reported from Papua New Guinea only. 500—2000 m a. s. 1.

Description author: Excited delirium [EXD]▼ (Request Authorship Credit)