Observation 58199: Psathyrella longipes (Peck) A.H. Sm.

When: 2010-11-04

Collection location: Buena Vista Park, Vista, California, USA [Click for map]

Who: Alan Rockefeller (Alan Rockefeller)

No specimen available

Spores dark brown, 7.5 – 8 × 11.5 – 12.5 micrometers.


pileipellis and gills, 40x
pileipellis 100x
cheilocystidia 400x
cheilocystidia 400x
cheilocystidia 400x
cheilocystidia 400x
spores 1000x

Proposed Names

58% (1)
Eye3 Eyes3
Based on microscopic features: The lack of cystidia argues against P. longipes. The spores are the correct size and shape.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: Alan Rockefeller (Alan Rockefeller)
2010-11-07 16:16:20 PST (-0800)

This one did have cheilocystidia. It was a different Psathyrella that was lacking it, thanks for noticing. This does not look macroscopically like P. candolleana because it is taller and more solitary than that species, and has more of a bell shaped cap vs. the conical cap in P. candolleana.

By: Christian (Christian Schwarz)
2010-11-07 09:33:06 PST (-0800)

looks right to me.

P. longipes has a longer, leggier stipe, more conical cap with sparse, triangular(ish) hanging veil remnants.

Also, why do the comment say “cheil not observed” when there is a photo of the cheilocystidia in the obs.?

Why not Psathyrella candolleana?
By: Douglas Smith (douglas)
2010-11-07 05:26:03 PST (-0800)

With the yellow color, in grass, and the veil fragments on the margin, why not Psathyrella candolleana. Which also does not have pleurocystidia, and the cheilocystidia are rather clavate. They could be missed as basidia perhaps, or the gill edges aren’t very clean, and they are missing.

I forget is there a difference in spore size? (Shoot, have to look it up in the Smith Psathyrella… that book is a pain in the ass to use… wait a couple minutes here…) Ok, so P. candolleana 7-9 × 4-5 um, and P. longipes 10-13 × 7-8 × 8-10 um. So, the spores here are larger, and seem to be better for P. longipes…

Still think it looks more like P. candolleana… seems small for P. longipes.

Created: 2010-11-06 18:55:26 PDT (-0700)
Last modified: 2015-12-15 00:20:56 PST (-0800)
Viewed: 72 times, last viewed: 2017-06-08 02:30:40 PDT (-0700)
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