Observation 142012: Psathyrella cotonea (Quél.) Konrad & Maubl.

When: 2013-08-07

Collection location: Lincoln Ridge Park, Kenton Co, Kentucky, USA [Click for map]

Who: Michelle Lierl (mlierl)

No specimen available

These were growing on a rotting log, in a rather open area of woods alongside a trail. They grew in small clusters of 3-6 stipes growing from a common base. No odor. The stipes are finely scaly, with tiny white scales on the upper 2/3, dark brown scales on the lower third of some of them. The largest cap was 3 cm diameter. The younger caps had veil remnants around the edges but none of them had an annulus.
Spore print purplish-very dark brown. Spore size 7-8 × 4.5-5 microns.

Proposed Names

59% (2)
Recognized by sight
71% (3)
Eye3 Eyes3
Recognized by sight: Walt Sturgen posted a very similar looking photo in 2010, IDd as P. cotonea

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: Byrain
2013-08-07 22:10:04 CDT (-0500)

are rather difficult to identify from just macro and spores, cystidia can help a lot, also laarger pictures… Check out Smith’s Psathyrella book if you want to make a serious attempt at identifying these.


But looks more like P. Cotonea
By: Eddee (eddeeee)
2013-08-07 21:55:09 CDT (-0500)

I have to agree.

Maybe P. delineata.
By: Eddee (eddeeee)
2013-08-07 21:51:33 CDT (-0500)
P. delineata grows on decaying hard woods. Another thought is Psathyrella hydrophila grows in cluster on hard wood logs There are several species that grow on decaying wood. Those scales are most likely what are known as fibrils. The spores look very Psathyrella like.
By: Michelle Lierl (mlierl)
2013-08-07 21:34:23 CDT (-0500)

I thought this might be a psathyrella, but the only psathyrellas with scaly caps, growing in clustes on logs that I could find in the guild books are P. caputmedusae (grows only in Pacific Northwest, and the spores are larger) and P. maculata, which also grows in the Pacific Northwest.
Does anyone know of a similar species that grows in Kentucky / Ohio?

Created: 2013-08-07 20:35:07 CDT (-0500)
Last modified: 2014-07-22 06:35:15 CDT (-0500)
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