Observation 27734: Mycena epipterygia (Scop.) Gray

When: 2009-11-03

Collection location: Strouds Run State Park, Athens, Ohio, USA [Click for map]

Who: Dan Molter (shroomydan)

No specimen available

These little Mycenas were growing in dense clusters from the ground and from rotting wood in a pine plantation. All parts of the mushrooms are covered with powdery cystidia. The yellow stem is another distinguishing feature.


gill edge at 100x

Proposed Names

29% (1)
Recognized by sight
82% (3)
Eye3 Eyes3
Recognized by sight
57% (1)
Used references: Per Inski’s suggestion.
83% (3)
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: Dan Molter (shroomydan)
2009-11-07 16:57:39 CST (-0500)

I just added a shot of the gill edge at 100×. I looked at two specimens and they both had that prominent layer of lighter material at the edge. I think some kind of dye would be required to see what is going on there at higher magnification.

Is there something I could buy at Walmart to use for a dye? I was thinking iodine or maybe food coloring.

Interesting reading, Noah
By: Irene Andersson (irenea)
2009-11-07 16:38:27 CST (-0500)

The description of griseoviridis reminds of M. epipterygia var. viscosa (rusty spots on gills, and stem fading to grey with purplish brown towards the base). This part was fun too:
“One of two specimens of M. viscosa sent to me by Dr. Rolf Singer has cheilocystidia like those of griseoviridis, the other like those of M. epipterygia.”

NA species of Mycena
By: Noah Siegel (Noah)
2009-11-07 15:57:11 CST (-0500)
I wonder
By: Irene Andersson (irenea)
2009-11-07 15:48:51 CST (-0500)

if var. griseoviridis is the same as var. badiceps..?

the cheilocystidia
By: Noah Siegel (Noah)
2009-11-07 14:20:49 CST (-0500)

are really different and would help to tell them apart.

By: Dan Molter (shroomydan)
2009-11-07 13:44:00 CST (-0500)

I do not remember the stripe being sticky, but I wasn’t looking for that character. I have a few specimens I could put under the scope. Is there some micro feature that would help sort this out?

This looks to be
By: Noah Siegel (Noah)
2009-11-07 11:26:13 CST (-0500)

what I’ve always called Mycena griseoviridis
Dan, did it have a sticky stipe?

Much obliged.
By: Dimitar Bojantchev (dimitar)
2009-11-07 09:08:10 CST (-0500)

Thank you.

There’s a note
By: Irene Andersson (irenea)
2009-11-07 08:49:44 CST (-0500)

under M. epipterygia in Funga Nordica..

Nice info….
By: Dimitar Bojantchev (dimitar)
2009-11-07 08:22:40 CST (-0500)

That’s a great bit of info Irene. Would you have a reference, or a source of the info, cause I’d like to use that line too…

The amount of varieties
By: Irene Andersson (irenea)
2009-11-07 05:29:17 CST (-0500)

aren’t clear in Europe either. There are opinions that several of the described ones can originate from the same mycelium.

M. epipterygia var. X
By: Dimitar Bojantchev (dimitar)
2009-11-06 23:52:28 CST (-0500)

M. epipterygia it is with that sticky yellow stem. Of course, which variety of the many available is not clear for North America.

By: Dan Molter (shroomydan)
2009-11-06 22:19:27 CST (-0500)
yellow fragile stem
By: Dan Molter (shroomydan)
2009-11-06 18:29:50 CST (-0500)

Hi Walt,

I don’t have that book, but all the photos of Mycena griseoviridis I can find online show brown coloration. These seem to be more fragile, and the stem is yellow all the way down.

Mycena griseoviridis
By: walt sturgeon (Mycowalt)
2009-11-06 17:57:56 CST (-0500)

Dan you might want to compare your species with the photos in Bessette & Fischer page 302. See what you think.

By: Michael W (Michael Wallace)
2009-11-05 18:01:24 CST (-0500)

I guess two similar cases are those of Roridomyces austrororidus, previously Mycena austrororida and Insiticia flavovirens, previously Mycena multicolorata.

The editorial comment for the genus Collopus at the Landcareresearch site mentions that it is a segregate genus from Mycena, maybe there is some DNA sequencing that could be referenced although I’m not sure how to find it!

which is correct?
By: Irene Andersson (irenea)
2009-11-05 05:36:44 CST (-0500)

Collopus or Mycena – a matter of opinion, I guess. Just like the choice of Prunulus or Mycena.
The epipterygia group is well defined as a section of its own, but I don’t know how closely related they are to the rest of the Mycenas – if it’s possible to pull them out and name them Collopus without having to split the rest of the genus Mycena and create several new ones at the same time?
Has anyone seen a map of DNA-sequenced Mycenas and is able to tell us more about that?

Nice find Dan,
By: Michael W (Michael Wallace)
2009-11-05 04:10:40 CST (-0500)

This mushroom is quite common in New Zealand but the name Irene mentions is listed as a synonym, the accepted name here is Collopus epipterygius, which is correct?

Created: 2009-11-03 18:44:07 CST (-0500)
Last modified: 2009-11-03 18:44:07 CST (-0500)
Viewed: 357 times, last viewed: 2018-11-10 04:51:54 CST (-0500)
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