Observation 25610: Crepidotus cesatii (Radenh.) Sacc.
When: 2009-09-20
Collection location: Thoiry, France [Click for map]
Herbarium specimen reported

Notes: Found on a small hardwood branch under spruce, hornbeam, and some random scrubby stuff. These are white, fibrous surface and non-hygrophanous.

Looking under the scope -

The first microshot is of the gill edge at 400x in Congo Red and KOH. Here the cheilocystidia can be seen, which are thick and tortuous, some branched. There was no pleurocystidia obs.

The second microshot is of spores on the cap surface at 1000x in Congo Red and KOH. Here the spores are light tan, subglobose, and echinulate (finely spiny). The spore size is apr. 6-8 um x 5-6 um.

Also, there were clamp connections obs., and the cap surface is intertwined fibrous hyphae with no gelatin.

Looking in the book “Il Genere Crepidotus in Europa” Consiglio, Setti (2008), this gets you to C. cesatii. Which in the notes they point out that this is perhaps the most common Crepidotus in Europe, and can be id’ed from the white fibrous non-hygrophanous surface, and gills that only go to a light orangy tan, not fully to a deep brown in maturity.

Proposed Names

86% (1)
Eye3 Eyes3
Used references: “Il Genere Crepidotus in Europa”, G. Consiglio, L. Setti (2008).
Based on microscopic features: Clamped hyphae, non-viscid surface, subglobose enchinulate spores, thick contorted cheilocystidia.

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Eye3 = Observer’s choice
Eyes3 = Current consensus

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Created: 2009-09-24 12:47:20 PDT (-0700)
Last modified: 2009-09-24 12:47:20 PDT (-0700)
Viewed: 176 times, last viewed: 2016-11-20 09:59:35 PST (-0800)
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