Observation 10301: Bolbitius viscosus Watling

When: 2008-09-01

Collection location: Strouds Run State Park, Athens, Ohio, USA [Click for map]

Who: Dan Molter (shroomydan)

No specimen available

These little buggers are slimy! At first I thought Mycena, but the pinkish gills on the mature specimen suggests Entoloma. They were growing on a rotting log along a stream bottom.

Proposed Names

-77% (5)
Recognized by sight
-54% (7)
Recognized by sight: Also known as Hygrocybe unguinosa.
45% (6)
Recognized by sight
-53% (5)
Used references: Aurora’s Mushrooms Demystified has a color photo of H. psittacina, which looks nearly identifical to this. Aurora’s description of a glutinous cap and stem seems to make this one a cinch.
14% (2)
Recognized by sight: Adding the I don’t know option.
92% (2)
Eye3 Eyes3
Recognized by sight: See obs 12263 for notes.

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Thanks Douglas
By: Dan Molter (shroomydan)
2008-10-12 07:19:44 PDT (-0700)

Great research and microscopy photos!

very cool mushroom, and thanks for your hard work, Doug.
By: Debbie Viess (amanitarita)
2008-10-10 07:45:37 PDT (-0700)
No, no, see 12263
By: Douglas Smith (douglas)
2008-10-09 16:35:12 PDT (-0700)

No, its now a good id. See obs. 12263, this species was pub. by Watling in 1975 from Michigan.

this is becoming an epic ID!
By: Debbie Viess (amanitarita)
2008-10-09 15:54:55 PDT (-0700)

be sure and describe (while fresh) and dry some of these, Dan; you could have something new! ;)

Well, not Bolbitius…
By: Douglas Smith (douglas)
2008-09-26 08:25:43 PDT (-0700)

Dan dried a few from here, I got these the other day. I was at the scope for other reasons looking at things, and I popped a gill on a slide to just check quickly and see what I could.

Looking at the spores, now I’m confused. The spores for this one are ellipsoid, and light yellow-tan, which is expected, but they are pointed, finely punctate with no germ pore, which was not expected. To be Bolbitius they should be smooth with a germ pore.

So, they’re not Bolbitius, and I’m not sure what they are. They are not really warted, just finely punctate. Since they are not smooth and no germ pore, this kicks out Bolbitius, Pholiotina, Conocybe, Pholiota. Not really warted, not really roughened, no plage, this kicks out Galerina, Gymnopilus (which it didn’t really look like anyway), on wood kicks out Cortinarius, Hebeloma. The spores aren’t dark enough to be Psathyrella, Paneaolus, Psilocybe, Hypholoma…

The spores actually remind me of a Crepidotus, but that doesn’t make sense with the stipe and viscid cap. Maybe the spores are like Naucoria, not sure that one is on wood or that viscid. Or might have to start searching for stranger genera for this one…

I need to do more work here, but at least at first look this don’t appear to be Bolbitius.

Specimens collected
By: Dan Molter (shroomydan)
2008-09-05 11:05:05 PDT (-0700)

I went back yesterday and picked a few mushrooms. Hopefully someone will have the equipment and inclination to complete this observation with microscopic photos. If somebody is willing to do the microscopy work, let me know and I’ll send the mushrooms in the last two photos.

Bolbitius, most likely.
By: Dimitar Bojantchev (dimitar)
2008-09-04 08:16:50 PDT (-0700)

This is a nice find. The closest is something around Bolbitius, I
agree, but I’m afraid that only microscopy and access to all relevant
literature can deliver the full verdict here. I have to look at the NA
literature. This looks like a species that hasn’t been pictured
before, but surely lives on paper somewhere.

The name Hygrocybe is totally misapplied here — to a lignicolous,
brown spored species…

D. www.mushroomhobby.com

P.S. People should also get it that there are many (most!) species
that are not in Arora and it is up to us to interpret the technical
descriptions of various early American authors to reach the truth. If
it is in Arora already then this effort of re-picturing things would
hardly be worth anything.

By: Irene Andersson (irenea)
2008-09-04 01:31:17 PDT (-0700)

There is one North American species, Bolbitius viscosus, said to have a dark olive brown cap..? Anyone who knows about it?

Brown spores?!?
By: Daniel B. Wheeler (Tuberale)
2008-09-04 00:24:59 PDT (-0700)

Don’t see ‘em. Don’t see “downy stem” either. According to Aurora, H. psittticina is widely variable for gill coloration.

At least no Hygrocybe
By: Irene Andersson (irenea)
2008-09-03 23:37:05 PDT (-0700)

Downy stem and brownish spores: Not Hygrocybe.

If you’re going to call it…
By: Debbie Drechsler (debdrex)
2008-09-03 21:29:01 PDT (-0700)

…Hygrocybe psittacina (not psitticina) you should correct the spelling.

By: walt sturgeon (Mycowalt)
2008-09-03 19:05:01 PDT (-0700)

With that spore color and fragile stipe Bolbitius callisteus would be a reasonable guess. There is considerable variability in the cap colors in your pictures.

Not Bolbitius
By: Daniel B. Wheeler (Tuberale)
2008-09-03 14:23:38 PDT (-0700)

Aurora is the most comprehensive key to Bolbitius that I have, and it mentions visid cap, but not glutinous cap. I believe the photos clearly shows glucinous. Another important feature not mentioned is what it was observed growing on. Substrate is often a key feature.

By: Irene Andersson (irenea)
2008-09-03 00:00:49 PDT (-0700)

Many features point towards Bolbitius. I don’t know if the colour fits within Bolbitius aleuriatus..?

By: Dan Molter (shroomydan)
2008-09-02 17:54:51 PDT (-0700)

In the last image, you can see spores on some of the caps. Spore deposit is a dull pinkish orangish brown.

By: Alan Rockefeller (Alan Rockefeller)
2008-09-02 15:38:09 PDT (-0700)

It would really help to know the spore print color.

Hygrocybe on wood?
By: Dan Molter (shroomydan)
2008-09-02 07:56:18 PDT (-0700)

It did cross my mind that these looked like brown parrot mushrooms, and they keyed out as Hygrocybe unguinosa in MDM, if you jump right to the hygrocybe key. However, Arora describes them as terrestrial, and I have never seen any other Hygrocybe growing on wood. That coupled with the salmon gills on older specimens makes me suspect something other than Hygrocybe.

Great images!
By: Debbie Drechsler (debdrex)
2008-09-01 20:49:49 PDT (-0700)

The first photo is just wonderful—that glob of dripping slime is perfect!

Created: 2008-09-01 12:45:08 PDT (-0700)
Last modified: 2008-09-01 13:02:51 PDT (-0700)
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