Observation 104214: Scleroderma cepa Pers.
When: 2012-08-07
No herbarium specimen

Notes: Hard, I had to jump on it to break it :D

Proposed Names

-62% (2)
Recognized by sight
28% (1)
Used references: Arora, Mushrooms Demystified. Plus notes on collections of Scleroderma identified by Dr. James Trappe.
28% (1)
Eye3 Eyes3
Recognized by sight: so this is what is left?

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Can probably eliminate S. bovista as well.
By: Daniel B. Wheeler (Tuberale)
2012-08-14 11:32:21 CDT (-0400)

S. bovista is typically soft and yielding in maturity, similar to Bovista pila. I would anticipate these sporocarps are mature from the color.

There are likely 7 Sclerodermatae known in Russia
By: Dmitriy Bochkov (convallaria)
2012-08-14 05:24:25 CDT (-0400)

S. citrinum, S. cepa, S. sapidiforme, S. areolatum, S. bovista, S. polyrhizum and S. verrucosum (in random order). Of these S. citrinum and S. verrucosum are the most common, and all but S. polyrhizum and S. sapidiforme are likely to be found in north-central Russia.

This is not S. areolatum which is a rather soft species.
This is not S. verrucosum because that has an easily noticeable pseudo-stem.
This is, like you said, not S. citrinum because that species is warty.

Now we’re left with S. cepa and S. bovista. From what I could find, the best (and only reliable) way to distinguish the two is microscopy (the former with spiny spores and the latter with reticulate). I can try to find them again if they’re still there and take a look (though last time I got lost in the forest:)), but my scope is probably not enough.

Are there any ways to distinguish the two with some certainty without scoping?

One of the S. cepa group, then.
By: Daniel B. Wheeler (Tuberale)
2012-08-07 14:04:01 CDT (-0400)

S. citrinum has erect warts/scales, which should extend about 2mm away from the peridium. It also has a thick peridium, which this obs. does not appear to have.

Without microscopy, I’d suggest S. laeve. There are problems with that, though: the peridium doesn’t look quite thick enough. But maybe these are large sporocarps?

Created: 2012-08-07 11:44:50 CDT (-0400)
Last modified: 2012-08-14 11:38:33 CDT (-0400)
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