Observation 33471: Gymnopus (Pers.) Roussel

When: 2010-02-11

Collection location: Joaquin Miller Park, Oakland, California, USA [Click for map]

Who: Debbie Viess (amanitarita)

Specimen available


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.
-4% (2)
Recognized by sight

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Dennis Desjardin recognized these as a Gymnopus sp.
By: Debbie Viess (amanitarita)
2011-09-22 15:40:43 CDT (-0500)

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 19:11:27 CST (-0600)

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 18:13:51 CST (-0600)

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 18:03:14 CST (-0600)

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 15:37:46 CST (-0600)

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 14:11:11 CST (-0600)
Did you check with KOH?
By: Irene Andersson (irenea)
2010-02-12 04:44:53 CST (-0600)

Could it be a Gymnopus in the group around fuscopurpurea?

Created: 2010-02-11 21:51:50 CST (-0600)
Last modified: 2017-01-06 10:12:18 CST (-0600)
Viewed: 344 times, last viewed: 2018-04-10 13:03:03 CDT (-0500)
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