Macroscopic feat.:

• Cap/Pileus: 1-3 cm broad. Conic at first, soon convex and eventually campanulate. Surface smooth, viscid when moist, and translucent striate along the cap margin. Reddish brown to brown when moist, hygrophanous, fading to light brown upon drying, becoming bluish in age or where damaged.
• Gills/Lamellae: Attachment adnate, brownish to purplish brown, with whitish margins.
• Stem/Stipe: 35-80 mm long by 1-4 mm thick, equal to slightly swelling at the base, which is usually adorned with whitish fibrils and/or rhizomorphs. Bruising bluish where injured.

Microscopic feat.:

• Basidio/Spores: Dark grayish violet in deposit, subrhomboid to subellipsoid, 5.5-7.7 by 4.2-5.5 µm.
• Basidia: 4-spored
• Pleurocistidia: 22-29 by 8.8-12 µm, fusoid-ventricose to sublageniform.
• Cheilocystidia: 9.6-13 na 5-7.2 µm, lageniform.

Habitat: Gregarious on grassy soils (Axonopus compresus) in forest of Araucaria brasiliana and Podocarpus. Known only from Brazil, near Sao Paulo, in March at approximately 1500 meters. Not yet reported outside this type locality.

Comment: Apparently active, Guzmán (1983) first discovered Psilocybe brasiliensis, and lists it under the psilocybin-producing varieties because of the bluing reaction. The general shape is reminiscent of some of the temperate Psilocybes like Psilocybe cyanofibrillosa. Being a grassland species, this mushroom is likely to be widespread and is a good candidate for cultivation in tropical environments. I think if more Brazilians were aware of this species, its range of dominion would be better documented. See also Psilocybe aztecorum, Psilocybe baeocystis, and Psilocybe mexicana.

source - Paul Stamets "Psilocybin Mushrooms of the World"

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