Observation 22316: Agrocybe Fayod

When: 2009-06-10

Collection location: Monarch Pass, Colorado, USA [Click for map]

Who: Debbie Viess (amanitarita)

Specimen available

single fruit body.

this was the exact location of an amazing abundance of mushrooms in that most extraordinary Colorado mushroom year of 2006; it was also two months earlier than the heart of their local season.


thick-walled with germ pore.
1000x, in water.

Proposed Names

-31% (2)
Used references: “Mushrooms of Colorado”, Vera Evenson
49% (2)
Eye3 Eyes3
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
OK, OK, I concede…
By: Debbie Viess (amanitarita)
2009-06-20 17:55:08 -05 (-0500)

that cracked yellow cap is more like an agrocybe than a psath. so much for superficial photo similarities!

spore colour in microscope
By: Andreas Gminder (mollisia)
2009-06-20 17:43:25 -05 (-0500)

The spore colour in microscope also says it is no Psathyrella! So I still opt for Agrocybe, even more then before.

Gill colour
By: Andreas Gminder (mollisia)
2009-06-19 14:55:55 -05 (-0500)

seem to contradict the determination as Psathyrella species, as well as the mebranous partial veil, which is quite unusual in Psathyrella. Though not familiar with the american Psathyrellas, I would also see a Agrocybe species in that picture.

another name for this species is “Pseudostropharia kauffmanii”…
By: Debbie Viess (amanitarita)
2009-06-19 11:27:09 -05 (-0500)

which gives a nod to its unusually robust shape for a psath. See Steve Nelson’s psath essay here:

Altho I haven’t yet scoped it, it does bear a striking resemblance to the Psathyrella barrowsii shown on page 137 in “Mushrooms of Colorado”; the thinner veil of my specimen seems a better match to the very similar P. kauffmanii.

I would agree
By: Gerhard Koller (Gerhard)
2009-06-19 11:00:17 -05 (-0500)

It looks more like an Agrocybe.

Not Psathyrella?
By: Douglas Smith (douglas)
2009-06-19 10:54:24 -05 (-0500)

I don’t think this is a Psathyrella here…

Created: 2009-06-19 09:48:57 -05 (-0500)
Last modified: 2009-06-19 09:48:57 -05 (-0500)
Viewed: 85 times, last viewed: 2018-03-18 02:51:04 -05 (-0500)
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