Observation 4481: Crepidotus amygdalosporus Kühner
When: 2007-10-21
Herbarium specimen reported

Notes: Id’ed with Arora, but he simplified the Crepidotus around here (which isn’t a bad thing). I saved this one, and I might try to see what is says in the monograph of US Crepidotus (there is one, isn’t there? But it isn’t really western species?).

9/3/2008 – Getting back to these from scope work on Aug. 6th -

Looking at some stuff from Los Trancos to get species better before starting the new season here. Getting some Crepidotus under the scope.

The first micro-shot here is of the gill edge at 400x under Meltzer’s. Here is displayed the cheilocystidia, which are fairly fat and blunt.

The second micro-shot is of cap surface material at 1000x in Meltzer’s. The surface hyphae can be seen here, and it was shown better in other photos, but you can almost see it here, there are clamp connections on the hyphae. Also there are lots of spores here, and it can almost be seen in the shot, that they are lightly punctate, not really smooth. The warting is so light, it is hard to get a clear photo of it.

With the clamp connections these are clearly not C. herbarum, which is a species without clamps. With the think blunt cystidia, ellipsoid spores that are lightly punctate, this points to a different species in the Hesler and Smith monograph of North American species – C. amygdalosporus.

There is a photo of this species in the monograph, and it looks good there, but there are a bunch of white species, although this one seems to fruit in larger numbers on top of each other. This species was also seen from the west, so it looks like a fairly good id.

Proposed Names

86% (1)
Eye3 Eyes3
Used references: “North American Species of Crepidotus”, Hesler, L.R. & Smith, A.H. (1965).
Based on microscopic features: Clamp con. obs., blunt thick cheilocystidia, ellipsoid spores, lightly punctate.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Created: 2007-10-24 12:19:06 EDT (-0400)
Last modified: 2008-09-03 12:10:21 EDT (-0400)
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