Observation 20693: Gymnopus (Pers.) Roussel
When: 2009-02-08
No herbarium specimen

Notes: Found under C. bay.

These are strange, I don’t think I’ve seen others like this one. They are a deep maroon-brown, non-viscid, non-fuzzy. Some small saprotroph on small woody debris. I had to take a spore print, I wasn’t even sure what the spore color might be, but there it is, white spored.

Probably some Gymnopus then, but not really sure at all.

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By: Irene Andersson (irenea)
2009-04-29 10:56:05 PDT (-0700)

What you wrote are parts of all the “facts” that just adds to the confusion…

To add some taxonomy on this
By: Gerhard Koller (Gerhard)
2009-04-29 09:57:33 PDT (-0700)

Collybia alkalivirens SINGER in the sense of European authors (the species turning green in KOH) is now validly called GYMNOPUS FUSCOPURPUREUS whereas Collybia fuscopurpurea ss.KONRAD&MAUBLANC is now called GYMNOPUS FAGIPHILUS. Collybia obscura is a nomen nudum and is applied to Collybia alkalivirens SINGER.

You can be right
By: Irene Andersson (irenea)
2009-04-29 09:24:28 PDT (-0700)

about this not being very hygrophanous. To me it looks like the one I have persisted in calling obscura, because I haven’t been able to find a better name on it.
I think the namings and synonymizing of these species have been very confusing, and would really like to have them sorted out. The latest info I have, is that obscura is a synonym of fuscopurpureus – but the concept has been widened to a more variable spore size, and growing both southern on litter of Fagus as well as northern on leaves and debris of Betula (Noordeloos as author).

If you are going to do some microscope work on this, please share the results..

It does look like Gymnopus alkalivirens is fairly close…
By: Douglas Smith (douglas)
2009-04-29 08:29:43 PDT (-0700)

Well, it does look like Gymnopus alkalivirens is fairly close. Although these are more maroon/burgundy brown, and the description there doesn’t mention the red-brown color at all, only a brown to cinnamon brown. Also that description mentions they are hygrophanous, and I don’t think these were hygrophanous. Hard to tell with only two caps found though…

It does mention that all parts, and the spores will turn green in KOH, so that is something to check under the scope.

It also mentions that these might be G. fuscopurpureus. And that G. fuscopurpureus was descibe by Arora from California, except in the Mykoweb notes it seems pretty much agreed that G. fuscopurpureus as used in California was misapplied to G. villosipes, and that was changed through work done by Dr. Perry and Prof. Desjardin at SFSU. Except I know G. villosipes fairly well, they are common enough in the early fall, and this one is not one of those.

And in other places on the web it equates G. fuscopurpureus with G.fagiphila, so that is the better current name.

By: Irene Andersson (irenea)
2009-04-29 06:41:50 PDT (-0700)

You have something called alcalivirens here:

I don’t know how many other look-alikes there really are, haven’t looked very carefully at these (just called them Collybia obscura..).

This is a Gymnopus I would say
By: Gerhard Koller (Gerhard)
2009-04-29 05:09:04 PDT (-0700)

Looks close to European G.fagiphila or alkalivirens …

Created: 2009-04-29 05:05:36 PDT (-0700)
Last modified: 2009-04-29 05:05:36 PDT (-0700)
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