Observation 83395: Deconica merdaria (Fr.: Fr.) Noordel.

When: 2011-11-25

Collection location: Samuel P. Taylor State Park, Marin Co., California, USA [Click for map]

Who: Ron Pastorino (Ronpast)

No specimen available

Caps on these were up to 3.1 cm across.
They were growing in grass in the middle of a dirt road used heavily by horses.
The stems were relatively pliant and not extremely fragile for their small size.
The spore print was black to purplish-black.
The spores were ~ 10.8-12.9 X 7.9-9.0 microns with a small neck and germ pore.
The caps all had a rather flat-domed shape and the gills adnate, some with short decurrent teeth. The gills turned very dark brown to blackish in age and only slightly mottled.
The Cheilocystidia was small and somewhat strangulated.


Spores in KOH @ 1000X.
Cheilocystidia in Congo Red @ 1000X.
Cheilocystidia in Congo Red @ 1000X.

Proposed Names

-28% (3)
Recognized by sight
28% (1)
Recognized by sight: Although, you should look at the gill edge in KOH to see if there are chrysocystidia.
68% (3)
Recognized by sight: On dung.
Based on microscopic features: Spore size and shape matches.

Please login to propose your own names and vote on existing names.

= Observer’s choice
= Current consensus


Add Comment
In spite of the lack of an obvious annular zone
By: Ron Pastorino (Ronpast)
2011-11-27 10:16:59 -05 (-0500)
I Think Alan’s ID is pretty good. These little guys were growing deeply in wet grass and a combination of mud and manure. I can see where skimpy annular material could be scraped and washed off. The photo in the Phillip’s book doesn’t show much of an annulus either. Everything else does fit nicely.
Deconica merdaria
By: Byrain
2011-11-27 00:30:48 -05 (-0500)

Doesn’t that species have a veil that often forms an annular zone on the stipe? I don’t see any trace of it in Ron’s photo.

Roger’s Mushrooms doesn’t seem to mention it, but MD and Psilocybin Mushrooms of the World does.

Deconica? Stropharia?
By: Byrain
2011-11-26 20:57:05 -05 (-0500)

Doesn’t look like Panaeolus which have jet black spore prints.

Created: 2011-11-26 20:53:18 -05 (-0500)
Last modified: 2015-01-08 22:25:19 -05 (-0500)
Viewed: 410 times, last viewed: 2019-02-26 17:31:36 -05 (-0500)
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