Observation 117346: Gymnopus fuscopurpureus group

When: 2010-11-20

Collection location: Indian Cemetery, Husum, Washington, USA [Click for map]

Who: Sava Krstic (sava)

No specimen available

Found near Indian Cemetery, only two mushrooms. The pictures are from the same place, taken in 2010.

Spores white, inamyloid, 6-7.5 × 3.5-4 microns. Cheilocystidia ~25 microns.

Proposed Names

28% (1)
Based on chemical features: See Noah’s comments.
56% (1)
Recognized by sight

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Re: Noah’s lower photo
By: Oluna & Adolf Ceska (aceska@telus.net)
2014-11-13 22:46:17 CST (-0500)

is really overexposed. Oluna and I came over one our 2005 Gymnopus collection that was generally lighter and had pileipellis hyphae encrusted.
I will post it as soon as I come across it while cataloging Oluna’s collections.
I was a herbarium curator for almost 15 years of my professional carrier and I messed up specimens regardless if they had or did not have collection numbers. Furthermore, you don’t need collection numbers if you don’t make any collections.

Noah’s lower photo
By: Christian (Christian Schwarz)
2014-11-13 19:20:00 CST (-0500)

is overexposed, and shows light-end stipes.
I am fairly certain they represent the same as you Gymnopus, Adolf.
As far as “they are going in under an incorrect name otherwise they might get lost” – how is the herbarium being run such that taxonomic clarity poses a risk to organization? Isn’t that what collection numbers are for?

… what should it be called & picture with the KOH reaction
By: Oluna & Adolf Ceska (aceska@telus.net)
2014-11-13 13:53:53 CST (-0500)

Jacob: We call our MO observations of this Gymnopus fuscopurpureus (Pers.) Antonín, Halling & Noordel. sensu Breitenbach et al. Our collections do not give the KOH reaction, the same as the voucher specimens of Breitenbach et al. (Fungi of Switzerland) treatment of “Collybia fuscopurpurea” (volume 3, page 176). Our UBC herbarium specimens will be filed as Gymnopus fuscopurpureus (Pers.) Antonín, Halling & Noordel., since they may get lost in the herbarium, if they are filed under a different name.
Noah: Thanks for the photos. The upper one is darker than our collections, and the lower one has much paler stipe than our collections have.
On the Pacific coast, this complex clearly needs further studies and more collecting.

G. fuscopurpureus lookalike
By: Jacob Kalichman (Pulk)
2014-11-13 12:20:18 CST (-0500)

Noah, is obs 123256 that? Assuming it’s undescribed, what should it be called on MO?

EDIT: Just noticed you already answered it. Lol.

picture with KOH reaction
By: Noah Siegel (Noah)
2014-11-13 12:07:59 CST (-0500)

The look-alike that has a different KOH reaction:

I was not able to get Noah’s picture
By: Oluna & Adolf Ceska (aceska@telus.net)
2014-11-12 16:10:19 CST (-0500)

Noah wrote:This is what I have been calling it: [no link]
Where did you see Noah’s “nice picture” of Gymnopus fuscopurpureus?
Our observations fits to “Collybia fuscopurpurea” in Fungi of Switzerland vol 3, page 176. They wrote: “We have not observed any incrustation on the hyphae of pileipellis in our collections of C.fuscopurpurea nor any color change in KOH …” Who knows, maybe Halling was wrong? Adolf

I see
By: Sava Krstic (sava)
2012-11-21 02:46:57 CST (-0500)

Nice picture! It seems that your green-reacting thing is much more “purpureus” than mine. It also seems that Ceska’s collections on MO (observation 165049) are closer to what I’m having here.

Thanks for your comments. Interesting…

By: Noah Siegel (Noah)
2012-11-21 02:28:59 CST (-0500)

not Gymnopus fuscopurpureus then… When I looked it up the other day there seemed to be a lot of confusion on what to call fuscopurpureus in western US.

This is what I have been calling it:

No green reaction
By: Sava Krstic (sava)
2012-11-21 02:01:32 CST (-0500)

I just tried both cap and stem. No green at all, just darker brown.

Green in KOH
By: Sava Krstic (sava)
2012-11-20 13:01:06 CST (-0500)

Noah, when I did the microscopy last night, I didn’t know what this mushroom was.
An attempt to ID it led quickly to G. fuscopurpureus. The description mentioned the green reaction to KOH and I felt curious about it, but it was too late and my mushrooms were back in the fridge…

I’ll try to check it if possible. I have only one cap in my box (half-dried because I took a spore print) and there was an army of tiny critters feasting on its gills last night, so I’m not sure what’ll remain of it.

Did you do a KOH test?
By: Noah Siegel (Noah)
2012-11-20 11:39:11 CST (-0500)

I have been finding two similar Gymnopus that don’t have a green reaction to KOH. I did see fuscopurpureus with a deep green KOH reaction a couple of days ago.

Created: 2012-11-20 03:57:06 CST (-0500)
Last modified: 2017-01-06 01:53:44 CST (-0500)
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