When: 2009-04-09

Collection location: Point Reyes National Seashore, Marin Co., California, USA [Click for map]

Who: Ron Pastorino (Ronpast)

Specimen available

Found these under Bishop pine. Couldn’t get enough spores to drop for a mass color print but in 3%KOH they appeared to be rusty,(see photo). The spores were about 7.0 X 4.5 microns and seemed rough. The color of the flesh was a lite olive yellow. KOH on the cap and stem seemed to turn reddish brown to darker brown.
When I first saw them I assumed they were a species of Dermocybe but now I’m questioning Cortinarius?


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Add Comment
Seems to be a Dermocybe undoubtedly
By: Gerhard Koller (Gerhard)
2009-04-13 16:09:01 PDT (-0700)

as for the rest it will be better to leave it at this point…the more as there is little consensus in this difficult group of fungi and as far as I know no worldwide monography is available for it

Probably senior croceus
By: Ron Pastorino (Ronpast)
2009-04-13 15:19:55 PDT (-0700)
Actually I was quite gentle with them and C. croceus sounds reasonable considering the habitat, etc. They are a little darker than normal but as the conditions were a little wet and they were not willing to readily drop spores, I suspect these specimens were in their twilight years.
A very mistreated fruitbody of Dermocybe
By: Dimitar Bojantchev (dimitar)
2009-04-13 08:44:33 PDT (-0700)

These do look like C. croceus. This is what I thought at first — a
very mistreated example of Dermocybe, but then when I looked closer I
saw Irene’s point. Anyway, if this is all you saw on the gill edge
then it is almost certainly not Gymnopilus. But at any rate, whatever
it is, it is hardly a representative form of it.

By: Erin Page Blanchard (CureCat)
2009-04-12 23:43:06 PDT (-0700)

Sure, they could have been growing from buried wood, but in such cases I usually see fragments of wood attached to the base.
And I’m not saying that Gymnopilus never grow from the ground, but I have certainly never found or heard of any Gymnopilus growing from dirt, soil, mud, etc. alone.

That basidia is very interesting! Really long and forked! I wonder if the other end of the Y shape will produce sterigma.

Added micro photos of gill edges
By: Ron Pastorino (Ronpast)
2009-04-12 11:28:45 PDT (-0700)

For the most part I didn’t see what I thought were cystidia on the gill edges. I’ve added two photos…one of which shows a prominent projection but appears to be basidia and others which could be basidioles?

One step further…
By: Irene Andersson (irenea)
2009-04-12 09:49:10 PDT (-0700)

Ron, did you check for cystidia on the gill edges?
Most Gymnopilus species have cheilocystidia with a capitate/subcapitate apex.
Very few corts have any prominent cystidia.

Not on exposed wood.
By: Ron Pastorino (Ronpast)
2009-04-12 09:00:02 PDT (-0700)

They were growing on the ground alongside a trail that has in the past yielded various species of Dermocybe. That and the color of the gills was why I initially thought of that genus.
They didn’t appear to be growing on wood but as Irene points out, that doesn’t completely rule out Gymnopilus or perhaps some other genus.

By: Irene Andersson (irenea)
2009-04-12 06:55:06 PDT (-0700)

There’s no need to be said that it grows on wood. Gymnopilus species are saprobes, and can grow on stumps and logs, on debris, buried wood, as well as just in soil.

By: Erin Page Blanchard (CureCat)
2009-04-12 05:45:00 PDT (-0700)

There was not mention of the mushrooms growing from wood, and the material attached at the base looks muddy, which suggests that they are not Gymnopilus.

Aside from that, the spore shape, size, and other features do not rule out Gymnopilus or Cortinarius, though I suspect the latter.