- Psilocybe montana
Psilocybe montana Scientific classification Kingdom: Fungi Division: Basidiomycota Class: Agaricomycetes Order: Agaricales Family: Strophariaceae Genus: Psilocybe Species: P. montana Binomial name Psilocybe montana
(Pers.) P. Kumm. (1871)
Psilocybe montana Mycological characteristics gills on hymenium cap is convex hymenium is adnate stipe is bare spore print is purple-brown ecology is saprotrophic edibility: unknown
Psilocybe montana, commonly known as the mountain moss Psilocybe, is the type species of mushroom genus Psilocybe. Because it does not contain hallucinogenic tryptamine derivatives like psilocybin or psilocin, it does not stain blue when handled, unlike other typical hallucinogenic members of this genus. It is usually found growing in mossy areas, often in montane regions. The appearance is that of a typical "little brown mushroom"—with a small, brown cap and a straight, thin stipe, growing separately or in clumps with others.
The cap is 0.5–1.5 cm in diameter, initially convex in shape but flattening in age, sometimes with a broad umbo. The cap is moist, glabrous, hygrophanous, and has radial striations to the center; the color is brown to dark-brown. The gills are adnate to broadly adnate or sometimes very shortly decurrent, and of the same color as the cap. The stipe is 1.5–4 cm long, 1–2 mm thick, smooth, the same color as the cap, and brittle. Spores are typically 7.5–10 × 6–8 × 5–5.5 µm and ovate–lentiform in shape with a thickened wall. A large spored variety (spore dimensions of 8.5–11 × 6.0–8.5 × 5.0–7.0 µm), Psilocybe montana var. macrospora Noordel. & Verduin (1999), has also been reported from the Netherlands. The spore print is dark greyish-brown.
Psilocybe montana is saprobic, possibly also parasitic. It is often associated with mosses such as Brachythecium albicans, B. mutabulum, Campylopus introflexus, Ceratodon purpureus, Dicranum scoparium, Eurhynchium hians, E. praelongum, E. speciosum, Rhacomitrium canescens, Pohlia species or Polytrichum piliferum. It is commonly found in exposed situations such as dune-meadows, heaths and tree-less tundra, and open Pinus forests, usually on nutrient-poor, well-drained soil.
The species has a worldwide, almost cosmopolitan distribution and has been reported from a variety of regions in a wide range of climates, including:
- Britain (Thetford Forest)
- California, USA
- the Caribbean
- China (western Kunlun Mountains)
- Colombia (high plains of Guasca)
- in alpine tundra as well as subalpine regions in Switzerland
- in the region formerly known as the USSR
- in the Venezuelan Andes and 
- in moss at high elevations in Idaho and Montana:590
- in Arctic tundra.:590
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