Observation 27917: Deconica merdaria (Fr.: Fr.) Noordel.

When: 2009-01-02

Collection location: Chico, California, USA [Click for map]

Who: canid

Specimen available

This mushroom was identified to Psilocybe by spore print color, growth directly from equine dung, presence of a pellicle which is partially removable when young.

it was distinguished from P. coprophila/subcoprophila, P. merdicola and P. moelleri by it’s spore size [arond 10-14µm in length if my memory serves] and shape [hexagonal to subhexagonal in frontal view].

interesting observations:

mushrooms seemed only to fruit from areas which had been flooded by rain and drainage, often growing to maturity under 1 or more inches of water.

two specimens latently bruised blue.

i have several dried specimens preserved in my collection.

[admin – Sat Aug 14 01:59:25 +0000 2010]: Changed location name from ‘Chio Ca’ to ‘Chico, California, USA’

Species Lists


in situo.
bluing observed.
collection with scale.
fruiting under water. this water was still receeding at this point, and it had not risen since the these specimens fruited.
some more photos from jan.
some more photos from jan.
some more photos from jan.
some more photos from jan.

Proposed Names

37% (4)
Recognized by sight
Based on microscopic features: spore shape and size

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= Observer’s choice
= Current consensus


Add Comment
glad to post them
By: canid
2009-11-08 18:18:35 PST (-0800)

yes, i saw they didn’t have any observations for this species, and have been meaning to participate here.

By: Shane Marsh (Mushane)
2009-11-08 17:56:45 PST (-0800)

I have seen these in person as well and they do indeed bruise blue, very awesome collection, im glad you found the ability(or internet ability) to upload them here.

Created: 2009-11-08 17:26:56 PST (-0800)
Last modified: 2012-11-30 16:57:25 PST (-0800)
Viewed: 1017 times, last viewed: 2019-04-19 10:16:03 PDT (-0700)
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