Psilocybe semiinconspicua
Encyclopedia
Psilocybe semiinconspicua is a psilocybin mushroom
Psilocybin mushroom
Psilocybin mushrooms are fungi that contain the psychoactive compounds psilocybin and psilocin. There are multiple colloquial terms for psilocybin mushrooms, the most common being shrooms or magic mushrooms....

 in section Semilanceatae native to the state of Washington in the United States
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...

. The mushroom is small, rare, difficult to see and stains blue where damaged. It can be mistaken for Psilocybe silvatica
Psilocybe silvatica
Psilocybe silvatica, is a psilocybin mushroom of the Agaricales family, in the section Semilanceatae, having psilocybin as main active compound. It is closely related to Psilocybe pelliculosa.- Description :...

and can be distinguished by its more conic cap, narrower spores and narrower cheilocystidia.

This mushroom is only known from the type locality where it was found at the Glacier Peak Wilderness Area in Wentachee National Forest, Washington, USA
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...

.

Cap

The cap
Pileus (mycology)
The pileus is the technical name for the cap, or cap-like part, of a basidiocarp or ascocarp that supports a spore-bearing surface, the hymenium. The hymenium may consist of lamellae, tubes, or teeth, on the underside of the pileus...

 is 7–12 mm and convex, becoming nearly plane in age. It is hygrophanous
Hygrophanous
The adjective hygrophanous refers to the color change of mushroom tissue as it loses or absorbs water, which causes the pileipellis to become more transparent when wet and opaque when dry....

, has a smooth surface, and is olive black when moist, fading to brownish orange or dark reddish brown as it dries.

Gills

The gills are Adnate light grayish brown at first, turning dark purple as the spores mature.

Spores

Psilocybe semiinconspicua spore
Spore
In biology, a spore is a reproductive structure that is adapted for dispersal and surviving for extended periods of time in unfavorable conditions. Spores form part of the life cycles of many bacteria, plants, algae, fungi and some protozoa. According to scientist Dr...

s are 8–10 x 5–7 µm , subovoid to ellipsoid, thick-walled, and yellowish brown to dark purple brown in deposit.

Stipe

The stipe
Stipe (mycology)
thumb|150px|right|Diagram of a [[basidiomycete]] stipe with an [[annulus |annulus]] and [[volva |volva]]In mycology a stipe refers to the stem or stalk-like feature supporting the cap of a mushroom. Like all tissues of the mushroom other than the hymenium, the stipe is composed of sterile hyphal...

 is 15–20 x 2 mm, hollow, has an equal width, and is white with whitish or brownish floccose scales, drying to a reddish brown. It stains blue near the base.

Microscopic features

The Psilocybe semiinconspicua basidia have four spores each. The cheilocystidia are sublageniform and 24–30 x 6–8 µm. No pleurocystidia have been observed. Clamp connections are present.

Habitat

Psilocybe semiinconspicua is gregarious in small groups among shrubs on a creek bank.
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