Observation 66970: Coprinellus impatiens (Fr.) J.E. Lange
When: 2011-04-29
Herbarium specimen reported

Notes: This seems to be the common spring coprinoid in Yosemite. This is about the third collection of it, and if I had looked at MO first, it would have saved me much time struggling with the key. However the spores on this specimen are a little small (short) for the description. These are 7.8-10.9 X 5.4-7, whereas the description lists them as 10.5-11.5 X 6.0-7.5. If anyone else picks up this species in California and gets it on a drier in time to save it, measure the spores and see what you get.

Images

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dissecting scope view of the gill edge showing abundant cheilocystidia
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cheilocystidia
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pileocystidium 96um!
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caulocystidia near stipe apex
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sphaerical cells in pileopellis

Proposed Names

83% (1)
Eye3 Eyes3
Used references: Flora Agaricina Neerlandica Vol. 6
Based on microscopic features: The shape and size of the cheilocystidia, pileocystidia, and caulocystidia, and the absence of pleurocystidia, the spore shape and slightly off-center pore, the spherical cells in the pileopellis

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Comparison of semi-deliquesced specimens
By: Christian (Christian Schwarz)
2011-05-06 22:48:53 IST (+0530)
photos might be a little atypical
By: Tom Bruns (pogon)
2011-05-06 22:07:06 IST (+0530)

Noah – I messed up my shot of these in the field and didn’t realize it, so the posted images weren’t made until two days later – not trophy images. But if I remember correctly the color was sort of grey even in the field and not tan like the posted impatiens photos. The collection was much larger than shown and consisted of maybe 50 scattered (and sometimes slighly clumped) mushroom. It was fruiting on the ground. C. dissminatus was what I wanted to make it when I turned to the key, but dissiminatus lacks cheilocystida, and they are abundant on this critter. The pileocystida are also a little wrong for the species, and the spores of this specimen are too broad.

.
By: Erin Page Blanchard (CureCat)
2011-05-06 06:43:00 IST (+0530)

Agree. The pleating looks different and these are much more grey and glisteny. Were these gregarious or clustered?

Spores for C. disseminatus are also smaller (6.5-10 × 4-6 µ), and pileocystidia can be up to 200 µ.

Tom,
By: Noah Siegel (Noah)
2011-05-06 06:40:52 IST (+0530)

what about something like Coprinellus disseminatus?
C. impatiens is a little stockier and paler colored, at least the collections from coastal CA.

.
By: Erin Page Blanchard (CureCat)
2011-05-06 06:23:59 IST (+0530)

Oh, so the spores are smaller… Interesting. I have a few collections of these around, so I’ll let you know what I find when I look at them.

way to set the bar high, Tom…
By: Debbie Viess (amanitarita)
2011-05-06 06:05:57 IST (+0530)

love those gill edges! ;)

Created: 2011-05-06 06:02:31 IST (+0530)
Last modified: 2011-05-06 06:05:28 IST (+0530)
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