Observation 46662: Psathyrella (Fr.) Quél.

When: 2010-06-11

Collection location: Germantown, Maryland, USA [Click for map]

Who: hríb

No specimen available

I was in an awkward position on slippery rocks to get these pictures, which is why some came out blurred.

Proposed Names

-23% (4)
Recognized by sight
60% (6)
Recognized by sight: longistriata looks close. Does it have to be restricted to PNW?

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: Douglas Smith (douglas)
2010-06-13 19:12:56 PDT (-0700)

Pholiotina… you know what I meant…

By: Erin Page Blanchard (CureCat)
2010-06-13 18:37:52 PDT (-0700)
Um, there is stuff out there…
By: Douglas Smith (douglas)
2010-06-13 17:35:49 PDT (-0700)

There probably won’t be anything in field guides for the US on Descolea, since it just doesn’t appear here. But putting the name into google gave me a bunch of stuff. Here is some more info:


Descolea was I think part of Conocybe maybe, it has a cellular cap surface. But it looks to be related to Cortinarius. I think I read somewhere that it might be mycorhizal with nothofagus forests? Which is a good enough reason not to see it in the northern hemisphere I would think.

I don’t think Tubaria confragosa since the veil and cap surface should be fibrous, here the veil is membranous. Various arguments on spore color aside.

There are probably rugulose Pholiotina, but I don’t have any of my sources on that with me right now. I just found some nicely rugulose Conocybe, so that is close.

Could be Psathyrella, I’d go with that too… although I’d probably lean Pholiota.

Need to put it under the scope really, to say any more.

By: Noah Siegel (Noah)
2010-06-13 17:23:33 PDT (-0700)

As Douglas said Descolea is a southern hemispear genus, only about 15 species. It’s related to Cortinarius… I’ll post some obs, it’s really common in NZ http://nzfungi.landcareresearch.co.nz/...

Is there an older name for Descolea?
By: Dave W (Dave W)
2010-06-13 16:44:36 PDT (-0700)

I can find virtually nothing about this genus, either in my manuals or online. Even Arora makes no mention (MD 1986 edition).

Arora writes about the cap of P. longistrata, “..surface smooth or slightly wrinkled.” I have seen examples of corrugated mushroom caps for species not typically described as corrugated.

I agree that the annulus appears to show a spore print too dark for Tubaria.

By: Erin Page Blanchard (CureCat)
2010-06-13 15:48:33 PDT (-0700)

Dave, there are many reasons why this is not T. confragosa (I am familiar with this species as well as P. longistriata here on the West Coast); the stipe is shiny, the gill attachment is different, the spore colour is more dark or chocolate brown rather than rusty or orange/brown, the overall colour of the mushroom itself is too pale and contrasted, where T. confragosa tends to be pretty uniform in colour. Also, as I mentioned, the corrugate cap…

Irene, the pileus is never wrinkled with P. longistriata, like it is here- at least never that I have seen or read.

The characteristic wrinkled cap seems to be disregarded here… I am not sure why; in Psathyrella it is an important identifying feature.

How about Tubaria confragosa?
By: Dave W (Dave W)
2010-06-13 08:54:56 PDT (-0700)

This one is known to occur in eastern NA. It can be confused with the ringed Psath.

By: Erin Page Blanchard (CureCat)
2010-06-13 08:22:05 PDT (-0700)

Good point on the distribution.

Though I think Pholiotina is less likely than Psathyrella because the gills are not orange/brown enough, and I don’t know of any corrugate capped Pholiotina. Are there any that you are aware of?

Um, except that…
By: Douglas Smith (douglas)
2010-06-13 08:14:58 PDT (-0700)

Except that the only obs. of a Descolea in the northern hemisphere has been in Hawaii, where it was introduced from Australia or New Zealand. The chances this is Descolea, is very, very slim to none.

I’d vote for some Pholiotina. But def. requires some scope work to say anything more.

By: Erin Page Blanchard (CureCat)
2010-06-13 08:09:47 PDT (-0700)

The pileus is corrugate, suggesting something closer to P. delineata or P. rugocephala, however the annulus for both species is much less prominent and fleshy as the mushroom in this observation.

Descolea! There is an idea… I like that better than Psathyrella for this observation.

I was about to post
By: Dave W (Dave W)
2010-06-13 07:42:43 PDT (-0700)

Psathyrella longistriata (see Audubon) as a “could be.” But the NA range for this species is west coast.

Created: 2010-06-11 15:10:03 PDT (-0700)
Last modified: 2010-06-19 14:36:31 PDT (-0700)
Viewed: 177 times, last viewed: 2017-06-07 17:02:24 PDT (-0700)
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