Name: Psilocybe cyanescens Wakef.
Most Confident Observations:
Copyright © 2019
Copyright © 2011 Erin Page Blanchard (CureCat)
Copyright © 2008 nightflyer
Copyright © 2009 Tom (LanLord)
Version: 3
Previous Version 

First person to use this name on MO: Alan Rockefeller
Editors: Nathan Wilson


Rank: Species

Status: Accepted

Name: Psilocybe cyanescens

ICN Identifier: missing

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Author: Wakef.

Citation: Trans. Br. mycol. Soc. 29: 141 (1946)


Domain: Eukarya

Kingdom: Fungi

Phylum: Basidiomycota

Class: Agaricomycetes

Order: Agaricales

Family: Hymenogastraceae

Genus: Psilocybe

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Brief Description: [See More | Edit]

Psilocybe cyanescens has a hygrophanous pileus that is chestnut-brown when moist, fading to pale buff or slightly yellowish. Fresh material always bruises a bluish or blue-green color where damaged, and the staining is still visible after drying. It’s stem is white when undisturbed and bruises easily when damaged. Cap generally measures from 2-5 cm across, distinctly wavy in maturity. Lamellae adnate, light brown to dark purple brown in maturity, with lighter gill edges. An annulus is absent and the spore print is dark purple brown. Microscopically, this species is characterized by common clavate-mucronate pleurocystidia and smooth, elliptical spores which measure 9 – 12 × 6 – 8. The odor and taste is farinaceous.

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According To Stamets
By: Excited delirium [EXD]▼ (Excited delirium [EXD]▼)
2019-02-14 09:48:14 CST (-0500)

According To Stamets, the chemical currently known as baeocystin (baeocystine) was incorrectly named. A misnomer occurred as a result of a mis-identified collection of what was actually Psilocybe cyanescens (and not Psilocybe baeocystis). Stamets proposed the chemical name Cyanescin as the new, corrected name.

(About 58 minutes in).

Also, see Guzman’s description of this species (page 334) here:

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