Observation 28277: Gymnopus (Pers.) Roussel

When: 2009-11-15

Collection location: Albany, California, USA [Click for map]

Who: Tom Bruns (pogon)

Specimen available

This is a dryophila-like species but with a distinctive reddish-brown stipe. The darker color of the stipe extends over the lower 3/4ths of it, but the upper part is pale, and essentially the same color as the pileus. The stipe is about 4-6 mm wide and flattened on one side (typical Gymnopus). Pilei are about 3-4 cm, and become irregular, wavy, and often depressed in the center. The pilei fade to a very pale tan, almost white, with age. The specimens have no smell or taste. It fruits on fir bark in my garden in large clusters and singly. The spore print is white (eliminating Rhodocollybia).

[admin – Sat Aug 14 01:57:47 +0000 2010]: Changed location name from ‘Albany, California’ to ‘Albany, California, USA

Proposed Names

44% (8)
Recognized by sight
1% (8)
Recognized by sight: red stipe, tan or brown cap which fades to a much paler colour (contrasting starkly with the red stipe), growing on conifer wood, sometimes clustered.
12% (5)
Used references: I brought it into the lab today and found that the stipe darkens with KOH (I could imagine it to be greenish) Using Hallings Collybia key Gymnopus erythropus (Pers.:Fr.) seems close. The basic color does fit acervatus well, but its really not densely clustered and it seems very short for the species as I have seen it before.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
dryophiloids . . . a scalp section will tell you for sure——
By: Roy Halling (royh)
2009-11-17 12:56:02 MST (-0700)

There are a bunch of “dryophila-like” entities out there that occur on wood chip mulch. I was never able to figure out what they were post 1983 and before we knew these things had DNA. Good thesis project for someone.

G. erythropus
By: Erin Page Blanchard (CureCat)
2009-11-16 16:44:31 MST (-0700)

Tom, I considered G. erythropus at first, but decided that G. acervatus was more likely since the former is described as growing from hardwood.

G. acervatus is bitter
By: Irene Andersson (irenea)
2009-11-16 01:34:24 MST (-0700)

I think this belongs to the dryophilus group.

By: Erin Page Blanchard (CureCat)
2009-11-15 20:28:50 MST (-0700)

Compare with other observations of Gymnopus acervatus.


I can’t think of a good reason why these would not be G. acervatus, aside from lack of microscopy.

Created: 2009-11-15 10:47:33 MST (-0700)
Last modified: 2017-01-05 23:33:59 MST (-0700)
Viewed: 185 times, last viewed: 2017-06-06 03:23:07 MST (-0700)
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