Observation 5391: Psathyrella longipes (Peck) A.H. Sm.
When: 2007-11-25
Herbarium specimen reported

Notes: 8/5/2008 – Getting back to these… I told myself I was going to wade into Psathyrella at some point, and I’ve started here… Got these under the scope finally.

The first micro-shot is of the pileus in radial section at 400x in Meltzer’s. The top surface can seen to be a epithellium, layers of inflated globose cells. There seems to be a few long filamentous hyphae on tope of these, perhaps from the partial veil.

The second micro-shot is of the gill edge at 400x in Meltzer’s. Here the cheilocystidia can be seen on a non-fertile edge. They are fusiod-ventricose. No pleurocustidia were observed, and the basidia are 4-spored.

The third micro-shot is of spores from the stipe apex at 1000x in KOH. Here the spores are dark coco brown, smooth, ellipsoid with a distinctive germ pore. Also the spore are slightly flattened, wide in face view than side view. The very rough ave. size is 12 × 7 um.

Putting this all together and going to the North American species of Psathyrella, A. H. Smith (1972), you get Psathyrella longipes (p93, #56). Which if I just listened to Arora, I would have gotten the same answer without a scope, or waiting 9 months to get around to looking at them… Make me wonder sometimes…

Proposed Names

29% (1)
Eye3
Recognized by sight
86% (1)
Eye3 Eyes3
Used references: North American species of Psathyrella, A. H. Smith (1972)
Based on microscopic features: Epithellium, fusiod ventricose cheilocystidia, no pleurocystidia, dark ellipsoid spores, veil tissue only on pileus margin.

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Eye3 = Observer’s choice
Eyes3 = Current consensus

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Created: 2007-12-09 22:47:39 CST (-0500)
Last modified: 2008-08-05 21:23:28 CDT (-0400)
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