Observation 63233: Agaricales sensu lato
When: 2011-02-06
(35.744° -78.413° )
Herbarium specimen reported

Notes: Collected on the bark of a hardwood tree trunk, laden with foliose lichens in a Pinus echinata stand.

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I’d argue against Lichenomphalia
By: Jason Hollinger (jason)
2011-02-07 11:06:10 PST (-0800)

I’m hardly an expert on the genus(!) But I’d argue against the genus:

I’d expect it to be restricted to the moistest, darkest habitats in the southeast, esp. the foothills. But I have seen little brown jobby mushrooms growing on bark of particularly old (but still live) oaks (with no lichens around to confuse the issue!) There is enough dead matter in the outer layers of old bark to support small nonlichenized fungi.

Aren’t the truly obviously lichenized Lichenomphalia restricted to the boreal? I never understood… is it Brodo’s comment?… about Lichenomphalia being “associated” with lichens — they are lichenized themselves, and need not grow anywhere near any other species of lichens. Only a few species of the genus (I read the monograph a few years ago) are what most lichenologists would even recognize as “real lichens”, being mostly just loosely (and in some cases not even obligately?) associated with algae. Few form a truly differentiated vegatative thallus (e.g., L. hudonsiana, a strictly boreal species, I think).

L. umbellifera just has an inconspicuous algal slime/fuzz. I’ve only ever seen L. umbellifera on rotting logs (where it is almost abundant in places like BC).

A mycologist could probably make a more erudite argument, but I believe omphalioids should have a more funnel-shaped cap, or at least deeply-depressed in the center. The gills should also be decurrent (not seen in these photos). And what about the “fuzz” or “pruina” on top? (Presumably a symptom of the structure of the surface of the pileus.) I don’t recall L. umbellifera having that. Galerina can, though, for example.

Created: 2011-02-07 07:17:45 PST (-0800)
Last modified: 2015-03-28 23:46:55 PDT (-0700)
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