Observation 177574: Scleroderma Pers.
When: 2014-09-10
No herbarium specimen

Notes: In an area with spread gravel (1 inch diameter stones).

Proposed Names

73% (2)
Eye3 Eyes3
Recognized by sight
63% (2)
Used references: Kuo’s Scleroderma Key at MushroomExpert.com

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
No need, Dave.
By: Daniel B. Wheeler (Tuberale)
2014-09-13 17:55:14 PDT (-0700)

I don’t own a scope of sufficient power, and don’t have access to an SEM.

I din’t know that Sclerodermas are mycorrhizal.
By: Dave W (Dave W)
2014-09-13 16:47:34 PDT (-0700)

I had assumed they were saprobes.

The spot where I collected this has a few transplanted ornamentals. I’ll eventually take an inventory of potential partners and post another comment.

From Mushroom Expert, “Scleroderma species are often defined on the basis of their spores by mycologists, and most identifications should be seen as tentative unless confirmed with spore analysis.”

As you indicate, Daniel, it’s likely a more powerful scope than mine may be necessary to achieve high confidence for a species name. If there are any of these left at the collection site, I’ll make a collection of spores and, if you like, send a sample to you.

Scleroderma is a much more cosmopolitan fungus
By: Daniel B. Wheeler (Tuberale)
2014-09-13 12:44:21 PDT (-0700)

than is allowed in many keys. Oregon sends thousands and thousands (millions?) of plants to other states every year. Many of these are inoculated here, and spread elsewhere.

Scleroderma are widely mycorrhizal, and relatively easy to cultivate. Spore microscopy would be a better means of identification, but size is a good relative measurement as well. Accurate spore microscopy sometimes requires SEMs.

Thanks Daniel.
By: Dave W (Dave W)
2014-09-13 09:52:40 PDT (-0700)

This small Scleroderma specimen certainly looks like many of the S. laeve photos I have found online. But Kuo says this species is found in western NA, and the only indication I have found of this species name being applied to material east of the Rockies is that it is mentioned in relation to a collection made in… Mississippi, I believe. Champignons du Quebec does not mention this species name within it extensive list.

Long axis measuring cross-section…
By: Dave W (Dave W)
2014-09-11 04:33:03 PDT (-0700)

less than 2 inches. Maybe about 4 cm.

If sporocarp is small
By: Daniel B. Wheeler (Tuberale)
2014-09-10 23:41:07 PDT (-0700)

(less than 2 inches across the cut surface) then S. laeve. While you told us how large the gravel is where this was found, you didn’t say have large the sporocarp is, so still guessing here.

Created: 2014-09-10 19:59:51 PDT (-0700)
Last modified: 2014-09-13 14:46:59 PDT (-0700)
Viewed: 36 times, last viewed: 2016-10-25 20:51:15 PDT (-0700)
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