Observation 80685: Radiigera Zeller
When: 2011-10-20
Herbarium specimen reported

Notes: same as David Rust’s sighting here: http://mushroomobserver.org/80405?q=8R4q

Proposed Names

-61% (2)
Recognized by sight: pink peridium.
Based on microscopic features: brown, finely warted spores: globose to subglobose to pear shaped!
84% (1)
Eyes3
Recognized by sight: No peridioles present in gleba, so not Pyrenogaster pityophilus or whatever the current nom du jur is. Key is in the spore ornamentation, and slightly smaller spore size. According to NATS Field Guide To Selected North American Truffles and Truffle-like Fungi, c. 2005 by Matt Trappe, Frank Evans and James Trappe, spores of Pyrenogaster pityophilus should measure 7-8 × 4-7 microns, are finely warty, and brown; while spores of Radiigera fuscogleba should have spores 4.5-8 microns broad, globose, finely warted, brown. However, the warts of Radiigera fuscogleba appear to be half a micron above the surface of the spore: much coarser than the very fine warts of Pyrenogaster. May need to double the magnification of the spores to see much of a difference.

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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spore mass came out in sheets!
By: Debbie Viess (amanitarita)
2011-10-26 03:07:42 CEST (+0200)

like an accordion….

Created: 2011-10-26 02:59:23 CEST (+0200)
Last modified: 2012-03-28 18:30:38 CEST (+0200)
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