Observation 72945: Psilocybe (Fr.) P. Kumm.
When: 2009-11-27
Herbarium specimen reported

Notes: Original Herbarium Label: Psilocybe cyanofibrillosa Guzmán & Stamets

Proposed Names

34% (3)
Recognized by sight
Based on microscopic features: Psilocybe cyanofibrillosa has forked cheilocystidia, P. pelliculosa has cheilocystidia fusiform, UNFORKED.
6% (3)
Recognized by sight: Growing under conifers. Thin stem. Habit mycenoid, not like cyanofibrillosa, see http://mushroomobserver.org/obs/15304. Pileus does not look like it will expand to plane.
Used references: The Genus Psilocybe pages 350, 353 and 357
Based on microscopic features: Spore size and shape. Forked cheilocystidia. No pleurocystidia.
Based on chemical features: Staining blue where damaged

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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The Genus Psilocybe
By: Alan Rockefeller (Alan Rockefeller)
2012-01-20 21:15:59 GMT (+0000)

If you use the key in The Genus Psilocybe page 342, this collection keys to Psilocybe pelliculosa.

P. pelliculosa has irregularly branched cheilocystidia according to The Genus Psilocybe page 358.

Your collection has a mycenoid habit and it doesn’t appear that the caps will ever expand to convex.

By: Oluna & Adolf Ceska (aceska@telus.net)
2012-01-20 02:56:19 GMT (+0000)

According to Stamets (1996): Psilocybin mushrooms of the world (used for the ID of these collections):

Psilocybe pelliculosa (MO Observation # 86599) has cheilocystidia fusiform to lance-shaped, with an elongated neck;
Psilocybe cyanofibrillosa (this MO Observation # 72945) has chelocystidia fusiform to lanceolate, with an elongated, forking neck.

Created: 2011-07-31 16:57:27 BST (+0100)
Last modified: 2014-04-20 06:08:47 BST (+0100)
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