Observation 45637: Megacollybia rodmani R.H. Petersen, K.W. Hughes & Lickey

When: 2010-05-19

Collection location: Bluestone State Park, Summers Co., West Virginia, USA [Click for map]

Who: Eddee (eddeeee)

No specimen available

Found grojwing on a shaded slope growing from buried wood. This was a cap that is about 16 cm smooth brown. The stem 10 cm I find this ever spring about this time in may.

[admin – Sat Aug 14 01:58:43 +0000 2010]: Changed location name from ‘Bluestone State Park Summers Co. West Virginia’ to ‘Bluestone State Park, Summers Co., West Virginia, USA’


Proposed Names

14% (3)
Recognized by sight: Found on burried wood.
87% (4)
Recognized by sight: is supposed to be the one you have in your area.

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= Observer’s choice
= Current consensus


Add Comment
What do ytou expect?
By: Douglas Smith (douglas)
2010-05-19 13:39:45 CDT (-0400)

What, you expect that anything published is still up to date, and mostly valid? Yeah, the study there was looking at the DNA and found areas where the DNA are different enough to suggest separate species.

I got in trouble here on Monday at the local meeting, because I put the name “Megacollybia fallax” on some local material. It caused some confusion, what is M. fallax they asked me? Forgot I was in Switzerland for a moment there…

A phylogeographic study
By: Irene Andersson (irenea)
2010-05-19 13:18:44 CDT (-0400)

showed separate species in separate parts of the world. It was published 2007.
I have placed the link in the Public Description of Megacollybia.

im just going by the field guides
By: Eddee (eddeeee)
2010-05-19 12:33:19 CDT (-0400)

In Bessette Mushrooms of Northeast United States. Page 203
Roody Mushrooms of West Virginia and the Central Appalachians page 209

Kou http://www.mushroomexpert.com/megacollybia_platyphylla.html
Arora mushrooms Dymystifyed list this as Tricholomopsis platyphylla but still using the species name platyphylla page 146.

Lencoff also lists it as T platyphylla.

So how does this work? I have three field guides listing this as M. platyphylla. I have yet to find a reference to M rodmani . Has there been some genetic studies to determin this is a separate species? its kind of like what good are field guides these days. just curios.

Created: 2010-05-19 11:48:58 CDT (-0400)
Last modified: 2012-01-11 21:55:57 CST (-0500)
Viewed: 63 times, last viewed: 2019-03-08 18:06:20 CST (-0500)
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