Observation 89925: Psathyrella atrospora A.H. Sm.
When: 2012-03-17
No herbarium specimen

Notes: Spores ~ 17.0-17.7 X 9.2-10.1 microns.
Spore print blackish.

Proposed Names

30% (2)
Used references: Mushroom Expert website. Also known as Psathyrella conopilus.
61% (2)
Eye3 Eyes3
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Germ pore
By: Byrain
2012-11-04 02:58:47 CET (+0100)

I think Parasola conopilus should have an eccentric germ pore and Psathyrella atrospora should have an apical pore which is oblique in the side view. Also, Smith indicates the latter should be “Densely cespitose (6-50 basidiocarps in a cluster)” more like our observations and the former should be “Typically scattered to gregarious in groups of 2-3”.

Didn’t do any more microscopy on these.
By: Ron Pastorino (Ronpast)
2012-11-03 22:12:38 CET (+0100)

The spore size does match the P. atrospora a little better but Smith states that the germ pore is indistinct on mature spores. These are subtle but I don’t know about “Indistinct”.
With Psathyrella and it’s cousins anything is possible.

The spores are kind of big…
By: Byrain
2012-11-03 17:41:22 CET (+0100)

Maybe you could compare it with obs – 64651 – http://mushroomobserver.org/64651?q=p8jF
Which is another large spored observation similar to P. conopilus. Did you check for setae on the cap and that pleurocystidia is absent?

Created: 2012-03-18 17:36:10 CET (+0100)
Last modified: 2012-11-23 08:25:04 CET (+0100)
Viewed: 139 times, last viewed: 2016-10-23 03:30:11 CEST (+0200)
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