Observation 7049: Clitocybe sclerotoidea (Morse) H.E. Bigelow
When: 2008-02-02
Herbarium specimen reported

Notes: (This one was posted as observation 6290 already, here is more detail.)

Ok, here’s one, I can’t get the genus on. It was found at Albion, in a camp ground on the north side of Jackson St. Dem. Forest. The caps are pretty much grey on grey, with grey undertones. Mostly found clustered. No spore print was found at the time they were found. At least they are Basidiomycota, and Agaricales.

But getting it under the scope, I still don’t get anywhere.

The first micro-shot is of the gill edge at 400x in Meltzers. There are no cystidia on the gill, and the edge is fertile. There is a basidia displayed in the shot, with 4 spores still attached. The spores are non-dextrinoid and inamyloid. Also the spores are a strange elongated pointed shape.

The second micro-shot is at 400x of the cap surface in radial section, with Meltzers. Here the pileipellis is seen to be a layer of gelatin about 130 um thick, with loosely embeded interwoven hyphae. The top surface at the top of the shot, is granular from spores from another ’shroom.

The third shot is of spores from the stipe apex in KOH at 1000×. Here the spores are hyaline, so the spore print is probably white for this species. The spores display the funny shape, long, thin and pointed. Some with guttules, and some whithout.

So, looking for a white spored, grey ‘shroom, non-dextrinoid, inamyloid, viscid cap, long thin pointed spores, no cystidia. And I’ve got nothing, it doesn’t seem to match anything to genus in Largent’s Mushrooms to Genus VI, Modern Genera.

Maybe I need to check for “carminophilous granules” in the basidia?

Proposed Names

28% (1)
Recognized by sight
61% (2)
Eyes3
Recognized by sight: This description is a good fit for Clitocybe sclerotoidea which might have been collected without the underground sclerotoid mass. The mushroom photos (12135 & 10828) show no evidence of a viscid cap and this species does have a pileipellis with a somewhat gelatinous cutis, as shown in photo 12137.
Used references: Bigelow, H. E. 1982. North American Species of Clitocybe Part 1. J. Cramer Co. New York, NY. 280p.
Morse, E. E. 1943. Study of a new Tricholoma. Mycologia 35: 573-581.
Trappe, James, M. 1972. Parasitism of Helvella lacunosa by Clitocybe sclerotoidea. Mycologia 64: 137-1340.

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Eye3 = Observer’s choice
Eyes3 = Current consensus

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Created: 2008-03-14 16:35:52 CET (+0100)
Last modified: 2011-01-23 10:40:49 CET (+0100)
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