Observation 5142: Trametes gibbosa (Pers.) Fr.
When: 2007-11-21
Herbarium specimen reported

Notes: large shelf fungus on dead maple log in moist hardwood valley
ST: none
CAP: 80-100mm wide, projecting 50-60mm, fairly flat and rounded, whitish to yellowish at v edge, soft velvety, margin fairly sharp thinning to about 1mm thick, older ones well-covered with thin coating of amorphous green algae
FLESH: white, avg 2-3mm thick but to 9mm, tough
PORE: whitish to creamy, elongate to almost maze-like, ~0.5mm wide, avg ~1.0mm long but to as much as 3-4mm in extreme cases, avg ~5mm deep but to 7mm
SPORE: print whitish

Proposed Names

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Eye3 = Observer’s choice
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Tweaked URL and formatting code
By: Administrator (admin)
2009-02-09 04:03:42 WIB (+0700)

I fixed Irene’s comment by adding a “code” block around the URL. The formatting code doesn’t expect runs of capital letters in URLs. I also tweaked the URL formatting code to allow them to be up to 60 characters before getting truncated. The old limit was 30 characters.

More T. gibbosa
By: walt sturgeon (Mycowalt)
2009-02-09 01:42:28 WIB (+0700)

Well,for some reason when I pasted the web link I got a forbidden to access this site message. I was taught the species common in the lake states by the late Bridge Cook who said it was more common in the subtropics. He called it Daedalea elegans. It is what I have been calling Trametes elegans. Then at a NEMF foray a couple years ago there was a man whose name I have forgotten separating T. gibbosum by using multi layers of the context as a feature. Macroscopically I think the T. gibbosum of European texts is the same as what I am finding. Thanks for the input and link Irene.

Strange conclusions
By: Irene Andersson (irenea)
2009-02-08 19:19:18 WIB (+0700)

In the article about T. gibbosa there’s a conclusion that it’s a late inhabitant in North America. My guess would rather have been that it IS an american polymorphic species, with an northern/eastern form that has spread to Europe..

About Trametes elegans, I’m not sure how to interprete the original descriptions, if it can be done at all. The first descriptions refer to collections from Costa Rica and Mexico, and says that it’s rather small, typically growing in a circular shape, with a short stem, up to an inch long. MycoBank provides a non-original description of it by Ryvarden & Johansen:
The only difference in the text between this description and the one of Trametes gibbosa (by the same author), is yellowish skeletal hyphae and longer spores in Lenzites elegans (5-7 microns in elegans, 4-5 in gibbosa). I’m not sure that the generally thinner fruitbodies in elegans is good enough for a proper ID. T. gibbosa is very variable in thickness.

It’s also very annoying that these later descriptions aren’t completed with pictures. The only one I’ve found from a tropical area, is an illustration on a stamp from Tonga…

By: Noah Siegel (Noah)
2009-02-08 08:27:24 WIB (+0700)

Irene, thanks for the link, I’ve been looking for that article.

What I’ve been told, mostly by Serge Audet from Quebec is that most/all of the collections of what we have been calling Tremetes/Lenzites elegans from the northeast are T. gibbosa. He also has mentioned that the way to tell them apart in the field is that the pores are more regular especially when young and the cap flesh is thicker in gibbosa
I called this observation elegans because even at this mature stage it’s only 9mm thick and having been near Cabin Cove before know that it’s mostly southern hardwood forest.

But I would call this ob gibbosa.

I’m not sure about
http://mushroomobserver.org/3952?search_seq=329767 but wouldn’t call it elegans.

The in-between one is
but the pictures aren’t very good…

At least two different species
By: Irene Andersson (irenea)
2009-02-08 04:44:33 WIB (+0700)

Lenzites/Trametes elegans is probably close, and has been interpreted in different ways, but is a tropical species, not the same as Trametes gibbosa.
Read this article:


(you’ll need to copy and paste the URL and remove the three dots… [admin: got the link working.])

I wasn’t able to copy and quote the parts of the article I wanted, so here’s just a short one:

“We beleive that a misdetermination of Trametes gibbosa as Lenzites elegans has kept this species from being discovered in North America for several years”…

Elegant polypore
By: walt sturgeon (Mycowalt)
2009-02-08 03:21:55 WIB (+0700)

Trametes elegans, Trametes gibbosa, Daedalea elegans, Lenzites elegans.
The name game… How many species are represented here? Two? One?

Nice to see someone picking up older observations
By: Irene Andersson (irenea)
2009-02-07 23:50:03 WIB (+0700)

Sorry, but is the name Lenzites elegans the right one to use here?
That’s the name of a small, pantropical polypore, first descibed from Guadelope. Sometimes that name has been misapplied on what I call Trametes gibbosa – which I beleive this one could be.

Created: 2007-11-25 01:35:09 WIB (+0700)
Last modified: 2007-11-25 01:35:09 WIB (+0700)
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