Psilocybe pelliculosa
| Psilocybe pelliculosa | |
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| Scientific classification | |
| Kingdom: | Fungi |
| Division: | Basidiomycota |
| Class: | Agaricomycetes |
| Order: | Agaricales |
| Family: | Hymenogastraceae |
| Genus: | Psilocybe |
| Species: | P. pelliculosa |
| Binomial name | |
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Psilocybe pelliculosa (A.H.Sm.) Singer & A.H.Sm. (1958) |
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| Synonyms | |
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| Psilocybe pelliculosa | |
|---|---|
| Mycological characteristics | |
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gills on hymenium |
 
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cap is conical or campanulate |
 
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hymenium is adnate or seceding |
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stipe is bare |
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spore print is purple |
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ecology is saprotrophic |
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edibility: psychoactive |
cap is conical
hymenium is adnate
Psilocybe pelliculosa is a species of fungus in the family Hymenogastraceae. The fruit bodies, or mushrooms, have a conical brownish cap up to 2 cm (0.8 in) in diameter atop a slender stem up to 8 cm (3.1 in) long. It has a white partial veil that does not leave a ring on the stem. American mycologist Alexander H. Smith first described the species in 1937 as a member of the genus known today as Psathyrella; it was transferred to Psilocybe by Rolf Singer in 1958.
Psilocybe pelliculosa is found in the Pacific Northwest region of the United States and Canada, where it grows on the ground in groups or clusters along trails or forest roads in coniferous woods. A single collection has also been reported from Finland. The mushrooms contain the psychedelic compounds psilocybin and baeocystin, although at relatively low concentrations. Several mushroom species that are similar in appearance to P. pelliculosa can be distinguished by subtle differences in the form of the fruit body, or by microscopic characteristics.
The species was first described scientifically by Alexander H. Smith in 1937 as Psathyra pelliculosa, based on specimens he collected in Washington and Oregon. The type specimen was collected near Lake Tahkenitch, Oregon, in November 1935. In a 1941 publication, Smith revised his opinion, and considered the species to be the same as Hypholoma silvatica (later Psilocybe silvatica), as he thought that the slight differences between the two were of no taxonomic significance. After reevaluating these two species in addition to several others closely related, Rolf Singer and Smith later reestablished the taxon and transferred it to Psilocybe in 1958.Psilocybe authority Gastón Guzmán classified the species in the section Semilanceatae, a grouping of related species characterized by having roughly ellipsoid, usually thick-walled spores, and lacking pleurocystidia.
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