Psilocybe cyanescens (Bluing Psilocybe)

Description: Tacky, wavy, brown cap, fading to yellowish, with brownish gills and whitish stalk; bruising blue.

Cap: 2-4 cm wide; convex, becoming nearly flat with undulating or wavy margin; sticky to moist, smooth; dark chestnut-brown, fading to yellowish, bruising blue.

Gills: attached, nearly distant, broad; cinnamon-brown, becoming darker.

Stalk: 6-8 cm long, 3-5 mm thick, sometimes enlarged at base; curved, whitish, bruising blue.

Veil: partial veil white, evanescent.

Spores: 9-12 X 5.5-8.3 m; elliptical, smooth, with pore at tip. Spore print purple-brown.

Edibility: Hallucinogenic.

Season: September - November

Habitat Several to many, in coniferous mulch.

Range: British Columbia to San Fransisco.

Look-alikes: The hallucinogenic P. baeocystis and P. strictipes lack wavy margin.

Comments: When ingested in large quantity, this can be strongly hallucinogenic.

Image and excerpt from Gary H. Lincoff's National Audubon Society Field Guide to North American Mushrooms, (1981, 2004, pp. 721-722).

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Bluing Psilocybe (Psilocybe cyanescens).jpg