Observation 29758: Trametes gibbosa (Pers.) Fr.

When: 2009-12-07

Collection location: New River Gorge National River, Fayette Co., West Virginia, USA [Click for map]

Who: Eddee (eddeeee)

Specimen available

Found growing on a downed Maple. The underside of the pore surface very maze like. The cap thick fleshy/leathery. spore print white



Proposed Names

-23% (5)
Recognized by sight: found growing on downed maple
Used references: Kou Mushroomexpert.com
Arroa. 1986 Mushrooms Dymystifyed page 588 to 589
Based on chemical features: KOH gray to black in 60 sec.
-32% (6)
Recognized by sight: I have tried the Index fungorum to find some sort of citation and author for D.
ambigua and there appears to be none. In fact the only reference I can find to D
ambigua is in Arora MO on page 589. And that is where i got his name from. My experience with D confragosa it is rather dark in color. Arora makes reference to D ambigua as being lighter color.
38% (5)
Recognized by sight
63% (3)
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
D. confragrosa morphology
By: Derek Ziomber (Space Time Matters)
2018-03-01 17:21:32 CST (-0500)

The pore configuration here fits D. confragrosa just as well as T. gibbosa. D. confragrosa varies widely. But the pores of T. gibbosa don’t bruise. Also, the smoother and glabrous cap fits D. confragrosa better than T. gibbosa, which is bumpier and typically tomentose, especially when fresh.

And this isn’t similar to T. cubensis, although there really isn’t much information available on the internet for this species. Here is a well referenced observation that cites this species as having 4-6 pores per mm:


And as far as T. aesculi turning reddish in age is concerned, this specimens looks relatively fresh. But most importantly, T. aesculi is described as having a pileus that’s less than 1cm thick.

By: Chaelthomas (Chaelthomas)
2018-02-28 20:03:53 CST (-0500)

Trametes elegans does not exist in North America. It is a tropical taxon.

By: Chaelthomas (Chaelthomas)
2018-02-28 17:41:11 CST (-0500)

Do not have the morphology of confragosa. It’s similar to cubensis and aesculi is the only one I know that turns red when old. Confragosa stains when young but it’s the pores match gibbosa. Trametes elegans is a tropical mushroom that does not occur in the states.

Reddish staining
By: Derek Ziomber (Space Time Matters)
2018-02-28 17:26:24 CST (-0500)

D. confragrosa is the only species mentioned so far that has reddish staining pores like this one seems to have. And lighter colored forms are far more common in northern Illinois. I’ve also seem whitish ones in Kentucky.

Thanks Irene,
By: Noah Siegel (Noah)
2009-12-08 21:39:28 CST (-0500)

I remembered it came up in the gibbosa/elegans discussion last year, just didn’t remember what it was now…

By: Irene Andersson (irenea)
2009-12-08 03:04:43 CST (-0500)

Daedalea ambigua is a synonym to Trametes elegans

there is a
By: Noah Siegel (Noah)
2009-12-07 23:47:29 CST (-0500)

Daedalea ambigua and I think that Lenzites ambigua is a old name for Trichaptum laricinum

Created: 2009-12-07 23:12:11 CST (-0500)
Last modified: 2018-03-03 21:41:04 CST (-0500)
Viewed: 235 times, last viewed: 2018-05-22 17:01:39 CDT (-0400)
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