Observation 67046: Discina (Fr.) Fr.

When: 2011-05-07

Collection location: Oneida Co., New York, USA [Click for map]

Who: Eric Smith (esmith)

No specimen available

Proposed Names

49% (7)
Recognized by sight
30% (8)
Recognized by sight
38% (8)
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: Andreas (AK_CCM)
2011-05-31 12:10:46 PDT (-0700)

I think such as Drew. It makes a lot of fun to discuss about the ID of fungi with poorly known characteristics.
Regards, Andreas

By: Drew Parker (mycotrope)
2011-05-31 08:03:09 PDT (-0700)

No need for apology. It can be a good exercise to speculate on a collection with limited information. It is a common real world situation. ;~)

By: Eric Smith (esmith)
2011-05-31 04:52:44 PDT (-0700)

As I said before; this was a hasty observation. I almost stepped on this specimen at the trail head on my way back to the truck. When I found this specimen, it was situated in full, bright sun. I used my baseball cap to shield the subject for photographs…my red baseball cap. The photo ended up with red tint that I thought I washed out when I edited the photo, but I can still see some red tint towards the top of the photo.

As far as the stain on the underside goes; I’m sure it’s there and not completely an artifact but I would say that it probably wasn’t as pink as the photo implies. Sorry for the confusion. Good eyes, everyone and thanks for all the input. If I had any idea that this specimen was going to generate this much interest, I would have collected it and documented it better. Sorry.

By: Andreas (AK_CCM)
2011-05-30 22:34:42 PDT (-0700)

Thanks for your response, Drew. At first I must confess that I only occasionally occupied with Gyromitra sensu lato. The determination of other Ascomycota I’ll leave completely to my colleagues – that’s not my world. Therefore I can be quite wrong with my conjecture.

The flesh seems really too thick and meaty for any Pseudorhizina sp. – I compared Bobs photo with some of P. californica and P. sphaerospora in my picture library. Furthermore the shape of their fruitbodies is more akin to an umbrella or a down slumping hot air balloon. Thanks for the info about Breitenbach and the color spectrum of the outer surface of D. perlata.

The color distortion at the top of the photo I was also already struck. But the outer surface before and after the pinkish tint is widely cream colored without any color distortion. But you’re right: the pinkish color could be less strongly as the photo shows.

Regards, Andreas

By: Drew Parker (mycotrope)
2011-05-30 21:49:42 PDT (-0700)

I have to go with Discina. The flesh seems too thick and meaty for Ps. californica. Breitenbach gives brownish pink as a possibility for color of the outer surface in Discina perlata. To me the red in the photo, at least near the top, appears somewhat overly saturated like there is reflected light from something red above it, or some sort of imaging artifact. So I suspect the pinkish tint is not as strong as it appears. However, I guess it will all remain speculative.

Speculation without additional characteristics
By: Andreas (AK_CCM)
2011-05-30 02:22:16 PDT (-0700)

Too bad that there are no collected fruitbody for microscopically analisis and no photo of the entire underside of the fruitbody available. Perhaps then we could speculate in more detail.

In the meantime I’ll stick with Pseudorhizina, because I’ve seen a photo from Sweden (North Europe) with fruitbodies of the related species P. sphaerospora growing on wood chips and they looks similar like the one at Bobs photo. And the pinkish tint at the piece of the underside is distinct visible. Does anyone know this feature from a Discina or Gyromitra species?

Regards, Andreas

gyomitra like indeed
By: Daniel Nicholson (danmadrone)
2011-05-29 09:47:49 PDT (-0700)

Were seeing lots of funny shaped Gyomitra on the west coast. It does make them look like Discina. But a white stem points it right at Gyomitra eh? any thing else is extremely hyopthetical…

What about Pseudorhizina?
By: Andreas (AK_CCM)
2011-05-28 21:42:13 PDT (-0700)

Very interesting finding. Because of the habitus, the chambered structure and the completely free margin I think the fungus could be a species of Pseudorhizina, perhaps P. californica. For this ID speaks also the violet-reddish tint at the underneath of the fruitbody which is typical for Pseudorhizina.

I only know P. sphaerospora from the Bavarian Forest National Park (Germany) where the fungus grows on a large and unsound stem of a fallen Picea abies. The fruitbodies are shown from the end of May to the end of June. This is the press release I wrote two years ago for the administration of the national park – feel free to use Google translator or another tool to read the text in your favorite language:


Microscopically the ID is simple: P. sphaerospora shows globose spores whereas the spores of P. californica are elliptic shaped.

Regards, Andreas

Sorry Damon…
By: Eric Smith (esmith)
2011-05-28 12:02:01 PDT (-0700)

no specimen was collected.

Walt, the habitat was the middle of the foot trail. Semi-hard packed sandy soil with plenty of organic matter. In mixed woods with oak, beech, birch, maple, hemlock and pine and god knows what else. Sorry. This was a particularly hasty observation…even for me. The fruit body was good-sized. Bigger in diameter than a baseball. I attempted to collect it and discovered that the stem was white, substantial, chambered and deeply and tenaciously attached to the substrate. Its crumbly texture prevented me from collecting the specimen in one or two pieces, so I left it. The completely free margin and overall discoid, rather than brain-like shape, made me want to call it Discina, though it was reminiscent of a malformed Gyromitra korfii.

By: walt sturgeon (Mycowalt)
2011-05-28 07:37:03 PDT (-0700)
Try some
By: damon brunette (damonbrunette)
2011-05-28 05:35:10 PDT (-0700)

KOH, may stain red…

No, I hadn’t considered Rhizina.
By: Eric Smith (esmith)
2011-05-28 05:17:43 PDT (-0700)

Never heard of it before. This mushroom was very Gyromitra-like in texture and odor. It was attached to the substrate by what seemed to be a rather thick, chambered stalk; which was confusing.

Also -
By: Douglas Smith (douglas)
2011-05-28 01:49:12 PDT (-0700)

Did you consider Rhizina also?

Created: 2011-05-07 11:20:59 PDT (-0700)
Last modified: 2011-05-31 08:18:02 PDT (-0700)
Viewed: 272 times, last viewed: 2017-06-09 08:28:51 PDT (-0700)
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