Observation 116077: Hygrocybe russocoriacea (Berk. & Jos.K. Mill.) P.D. Orton & Watling
When: 2012-11-01

Notes: Herbarium number: HRL1390

Under poplar, birch and other deciduous trees. White pine close by.

Proposed Names

82% (1)
Eye3 Eyes3
Recognized by sight: Strong cedar smell
Based on microscopic features: spore size, gill trama, pileipellis

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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They might well be ectomycorhizal
By: Renée Lebeuf (Renée Lebeuf)
2013-01-07 18:09:56 EST (-0500)

A study on that subject was published last year: Seitzman BH, Ouimette A, Mixon RL, Hobbie EA, Hibbett DS. Conservation of biotrophy in Hygrophoraceae inferred from combined stable isotope and phylogenetic analyses. Mycologia. 2011 Mar-Apr;103(2):280-90

Here’s the abstract of the article:

The nutritional modes of genera in Hygrophoraceae (Basidiomycota: Agaricales), apart from the ectomycorrhizal Hygrophorus and lichen-forming taxa, are uncertain. New δ(15)N and δ(13)C values were obtained from 15 taxa under Hygrophoraceae collected in central Massachusetts and combined with isotopic datasets from five prior studies including a further 12 species using a data standardization method to allow cross-site comparison. Based on these data, we inferred the probable nutritional modes for species of Hygrophorus, Hygrocybe, Humidicutis, Cuphophyllus and Gliophorus. A phylogeny of Hygrophoraceae was constructed by maximum likelihood analysis of nuclear ribosomal 28S and 5.8S sequences and standardized δ(15)N and δ(13)C values were used for parsimony optimization on this phylogeny. Our results supported a mode of biotrophy in Hygrocybe, Humidicutis, Cuphophyllus and Gliophorus quantitatively unlike that in more than 450 other fungal taxa sampled in the present and prior studies. Parsimony optimization of stable isotope data suggests moderate conservation of nutritional strategies in Hygrophoraceae and a single switch to a predominantly ectomycorrhizal life strategy in the lineage leading to Hygrophorus. We conclude that Hygrophoraceae of previously unknown nutritional status are unlikely to be saprotrophs and are probably in symbiosis with bryophytes or other understory plants.

ah yes, the does it or doesn’t it quandry.
By: Debbie Viess (amanitarita)
2013-01-07 10:44:35 EST (-0500)

Ben Wolfe has really started the ball rolling with his work on the non-MR amanitas and their primitive ability to function as saprobes. Why not other saprobes also losing that extra wood-digesting enzyme and switching to a MR existence?

I have suspected that a number of purportedly MR species, like our western yellowfoot, also have the ability to digest wood. We see them so very frequently on wood. And of course, we also often see other MR species on wood, in singles, here and there. Mutations exploring new niches?

Evolution happens, we just get to bear witness.

I heard tale
By: Danny Newman (myxomop)
2013-01-07 09:03:02 EST (-0500)

of some work being done to determine the extent to which this and other allied spp. were, in fact, mycorrhizal. i know not of any conclusions drawn, but am very, very interested.

ain’t nomenclature fun?
By: Debbie Viess (amanitarita)
2012-11-08 18:17:30 EST (-0500)

still, fun mushroom. thanks for posting here, Renee.

It seems that all the experts do not agree between themselves.
By: Renée Lebeuf (Renée Lebeuf)
2012-11-08 17:56:33 EST (-0500)

Some putting Camarophyllus at genus level and other at subgenus level. So, If Mushroom observer prefers the genus Camarophyllus, I won’t argue and will use it. I was just trying to follow what Index Fungorum says.

D.J. Lodge
By: Erlon (Herbert Baker)
2012-11-08 14:47:36 EST (-0500)

D.J. Lodge provided the following comment:
“Camarophyllus has a lamellar trama of highly interwoven, generally uninflated, glassy-walled hyphae, whereas Hygrocybe has a regular or subregular arrangement of hyphae in the lamellar trama, composed of inflated hyphae with thinner walls. Camarophyllus comes out at the base of the family, Hygrocybe in the upper, distal branches, and Hygrophorus, (with divergent lamellar trama and apparently strict ectomycorrhizal associations) between them in the middle. Unless you want to go back to the Hesler & A.H. Smith system of calling everything in the family as one genus, Hygrophorus, then you have to recognize Camarophyllus as a separate genus from Hygrocybe. See the molecular phylogenetic tree in Matheny et al. 2006.”

Hello hello back to you! ;)
By: Debbie Viess (amanitarita)
2012-11-08 10:38:58 EST (-0500)

Ah, you dried it. That odor will persist. It is quite common here in the west, but I never tire of finding it.

I might still sneak around calling it Camarophyllus for a bit longer, though.
Old habits die hard.

Hi Debbie,
By: Renée Lebeuf (Renée Lebeuf)
2012-11-08 06:42:26 EST (-0500)

The cap on the left was getting old. All the other ones were like the small one on the right. As to the name, Hygrocybe is the name recognized in Index Fungorum and also by Boertmann in his book.

It’s a very rare species here in the East. I had never seen it before.

The picture taken in the field by André might be more explicit:

Hi Debbie,
By: Renée Lebeuf (Renée Lebeuf)
2012-11-08 06:40:24 EST (-0500)
Hi Debbie,
By: Renée Lebeuf (Renée Lebeuf)
2012-11-08 06:40:24 EST (-0500)
must we toss aside…
By: Debbie Viess (amanitarita)
2012-11-07 23:22:08 EST (-0500)

the old name of camarophyllus?

I was rather fond of it.

the caps that you picture here are browner than the ones that I am used to.

Created: 2012-11-07 22:32:34 EST (-0500)
Last modified: 2012-12-24 23:27:06 EST (-0500)
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