Psilocybe semilanceata (Liberty Cap)

Description: Slimy, narrowly conical, brown to tan cap with brownish gills and smooth, off-white stalk; in pastures and manured areas.

Cap: 1-2.5 cm wide; sharply conical, often peaked, and not expanding; sticky, smooth; brownish, fading to tan, bruising blue on margin.

Gills: attached, close, broad; grayish, becoming dark brown.

Stalk: 5-10 cm high, 1.5 mm thick; very thin, whitish.

Veil: partial veil evanescent.

Spores: 11-14 X 7-8 m; elliptical, smooth, with pore at tip. Spore print purple-brown.

Edibility: Hallucinogenic.

Season: Late August-November.

Habitat Scattered to numerous, in tall grass and grassy hummocks in cow pastures.

Range: Widely distributed; common in Pacific NW.; also reported in Quebec.

Look-alikes: The Hallucinogenic P. pelliculosa and P. silvatica grow in wood chips or mulch, and have conical caps.

Comments: this species is one of the most familiar hallucinogens of the Oregon coast.

Image and excerpt from Gary H. Lincoff's National Audubon Society Field Guide to North American Mushrooms, (1981, 2004, pp. 723-724).

Other images from Richard and Karen Haard's Poisonous and Hallucinogenic Mushrooms, (1977, Colour Plates 23 and 24).

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Related Reading:

Liberty Cap (Psilocybe semilanceata).jpg
Psilocybe semilanceata fresh versus hygrophanus form.jpg
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