Observation 59866: Elaphomyces muricatus Fr.

Proposed Names

76% (2)
Eye3
Recognized by sight
28% (1)
Recognized by sight: After a Google search for Elaphomyces in North Carolina, found a photo for E. anthracinus which seems pretty close to this collection.
84% (1)
Eyes3
Recognized by sight: Elaphomyces currently divided by whether peridium (outer layer or rind) contains spores or not. If with spores, then E. muricatus. If no spores, then E. granulatus.

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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E. granulatus vs. E. muricatus
By: Daniel B. Wheeler (Tuberale)
2010-11-28 21:31:08 CST (-0600)

Generally Elaphomyces are grouped into either E. granulatus (without spore in the peridium) or E. muricatus (with spores embedded in the peridium. Name is given as Elaphomyces muricatus in “NATS Field Guide To Selected North American Truffles and Truffle-like Fungi”, by Matt Trappe, Frank Evans and James Trappe, c. 2005 by The North American Truffling Society.

However, both genera have many subdivisions now known, and the genus is in need of revision and some new species. I have found one sp. nov. myself near Cascade Locks. Under 100x the spores of this specimen are both green and red, not unlike a bizarre color-blind test pattern.

This collection looks to have separate globular chambers where spores mature, which is somewhat different than either E. granulatus or E. muricatus. Based on photos alone, the closest species seems to be E. anthracinus, which has been reported from North Carolina. To my knowledge it is not reported from my area.

Distinctly marbled inner peridium
By: Irene Andersson (irenea)
2010-11-28 14:14:00 CST (-0600)

and spiny cortex. I think it points towards E. muricatum.

No need to be sorry, Jason.
By: Daniel B. Wheeler (Tuberale)
2010-11-28 13:33:41 CST (-0600)

Even with a specimen in hand, Elaphomyces are notoriously difficult.

sorry, no specimen
By: Jason Hollinger (jason)
2010-11-28 12:08:10 CST (-0600)
Appears to be something in the E. muricatus group.
By: Daniel B. Wheeler (Tuberale)
2010-11-28 11:36:48 CST (-0600)

Spores found in the peridium prove near E. muricatus. But which one?

Created: 2010-11-28 10:46:48 CST (-0600)
Last modified: 2012-06-27 18:43:16 CDT (-0500)
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