Observation 31235: Coprinopsis nivea (Pers.) Redhead, Vilgalys & Moncalvo


[admin – Sat Aug 14 01:58:20 +0000 2010]: Changed location name from ‘Bear Creek Trail, Briones Reservoir, Contra Costa County, California, USA’ to ‘Bear Creek Trail, Briones Reservoir, Contra Costa Co., California, USA


Spores at 1000x 14-17µm x 10-13µm, elliptical, polygonal.
Spores at 1000x 14-17µm x 10-13µm, elliptical, polygonal.
Fruitings from the turdarium
Fruitings from the turdarium
Fruitings from the turdarium
Fruitings from the turdarium

Proposed Names

-35% (3)
Recognized by sight
Based on microscopic features: Spores are elliptical with somewhat flattened sides, 14-17µm x 10-13µm
11% (3)
Recognized by sight

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: Darvin DeShazer (darv)
2010-01-18 17:22:56 PST (-0800)

Creative term – turdarium

well darn
By: Erin Page Blanchard (CureCat)
2010-01-02 17:26:00 PST (-0800)

That rules out C. trispora, the spores are far too large. The range is much closer to C. nivea, and that species is far more common here, though the granules are often less accentuated, so I was hoping this was something more exotic. ;) Oh well.

Richard, I have horrified my roomates by bringing home and watering cow patties of Stropharia semiglobata in the potted plants. So good luck with the project, I hope to see more photos!

Going beyond……
By: Richard Sullivan (enchplant)
2010-01-02 12:47:03 PST (-0800)

Clearly I have a need to gross everyone out completely, so I have actually taken the entire horse pucky home in a bag to see if I can get some of the remaining buttons to grow to maturity. I’ll then have a go with the scope to find those elusive three spored basidia.

good man! doing disgusting things for science!
By: Debbie Viess (amanitarita)
2010-01-02 12:14:03 PST (-0800)

more important than spore size is the fact that trispora should show basidia with only three spores…not sure how that would play out in a pool of mush, tho…I think that Coprinopsis is prob. still the best name for this one.

Erin, are there other documented collections of trispora from California?

Spores seem a little large for C. trispora
By: Richard Sullivan (enchplant)
2010-01-02 12:09:31 PST (-0800)

Okay, I went back and scraped the black remnants from the hefty turd and here is what I found.
Smooth elliptical spores (somewhat polygonal)14-17µm x 10 -13µm.
The things we do for science!

By: Erin Page Blanchard (CureCat)
2010-01-01 19:53:31 PST (-0800)



It is clearly a Coprinopsis, and I can’t think of or find any other species with such distinct ephemeral granules… Almost like Cystolepiota in that regard… The close species seem to have the more common floccose, patchy.. stuff.

Please don’t make me go back
By: Richard Sullivan (enchplant)
2010-01-01 19:32:49 PST (-0800)

to scrape the black slime off the clot of horse poop tomorrow, looking for spores!

OK I’ll bite…
By: Debbie Viess (amanitarita)
2010-01-01 19:25:52 PST (-0800)

where is there a description of this mushroom, and how did you make your determination?

Created: 2010-01-01 13:27:06 PST (-0800)
Last modified: 2010-08-14 11:46:00 PDT (-0700)
Viewed: 130 times, last viewed: 2017-11-18 10:29:47 PST (-0800)
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