Observation 33471: Gymnopus (Pers.) Roussel
When: 2010-02-11
Herbarium specimen reported


enlarge for stipe detail
cap color unchanged in KOH
stipe color unchanged in KOH.
after one day indoors under refrigeration.
gills lightening with white sporedrop.
close-up of cap texture.

Proposed Names

29% (1)
Recognized by sight: shelving on madrone; white spores, dark gills, hygrophanous cap with striate margin, tough stipe with tomentous base. no odor. Some kinda Marasmius???
61% (2)
Eye3 Eyes3
Recognized by sight: it was growing on the bark of a living tree. will check with KOH and look at the spores today.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Dennis Desjardin recognized these as a Gymnopus sp.
By: Debbie Viess (amanitarita)
2011-09-22 16:40:43 CDT (-0400)

when I dropped them off at the SFSU Herbarium last week.

The stipe is too thin and glabrous for Pseudobaespora…
By: Dimitar Bojantchev (dimitar)
2010-02-12 20:11:27 CST (-0500)

The stipe is too thin and glabrous for Pseudobaespora. Did you see the color of the spores? Let’s start there — basic shape and size — need one good shot. In a way it resembles a Mycena too. The Madrone association is interesting – we have a couple of interesting species from Madrone, like Mycena… uff, I forget now… We get these interesting guys late in the wet season.

I agree that this is something quite unusual and interesting…
By: Debbie Viess (amanitarita)
2010-02-12 19:13:51 CST (-0500)

and prob. not Marasmius OR Gymnopus. But prob. not Pseudobaeospora either, judging from the two species from CA that I reviewed.

Putting a wild guess name up at least gets folks to react, whereas “Fungi sp.” tend to end up in the ever-growing trash pile of “never to be seen again” sightings here on MO…

By: Dimitar Bojantchev (dimitar)
2010-02-12 19:03:14 CST (-0500)

You don’t think this could be one of those Pseudobaeospora out there? Microscopy is a must at that point, but this neither strikes me as Marasmius, nor Gymnopus… Something more exotic.

By: Irene Andersson (irenea)
2010-02-12 16:37:46 CST (-0500)

I have no more ideas, maybe spores and cheilocystidia can help?

no color changes with KOH, stipe or cap
By: Debbie Viess (amanitarita)
2010-02-12 15:11:11 CST (-0500)
Did you check with KOH?
By: Irene Andersson (irenea)
2010-02-12 05:44:53 CST (-0500)

Could it be a Gymnopus in the group around fuscopurpurea?

Created: 2010-02-11 22:51:50 CST (-0500)
Last modified: 2011-09-23 15:53:34 CDT (-0400)
Viewed: 325 times, last viewed: 2016-10-24 08:06:13 CDT (-0400)
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