Observation 64276: Psathyrella (Fr.) Quél.

When: 2011-03-11

Collection location: Joaquin Miller Park, Oakland, California, USA [Click for map]

Who: Debbie Viess (amanitarita)

Specimen available

collected in exact location of first collection two weeks prior.

in grass and woodchips along road.


spores in H2O.
dark spores in H2O, round headed basidia, cystidia fat in the middle, elongated at both ends.
spores in H2O.
1000x in H2O.
spores attached to basidium; super long sterigma; I observed cytoplasmic streaming into immature spores at L. bottom.
note ROUND-HEADED basidia.

Proposed Names

71% (5)
Recognized by sight: same sp. collected at BAMS foray here.
absolutely no trace of red or pink or purple on cap, gills or stipe.
Based on microscopic features: cystidia thin-walled, narrow at ends, fat in middle; basidium rounded at top with very long sterigmata; spores dark brown, ellipsoid, with germ pore, 13 × 7 microns.
Based on chemical features: mushroomy odor, not fruity.
-35% (3)
Recognized by sight: except for no reddish tones nor visible veil remnants.
Used references: See Smith’s Psathyrella Monograph for more details. The species was formerly called P. barlae f. minor.
Based on microscopic features: spores at 13-7 micrometers are well within the described range for bipellis. unique, round-headed four-spored basidia further convinced me. but darn it, the cystidia are too small at only 35 micrometers. back to psath sp., unless somebody else can convince me otherwise…
Based on chemical features
28% (1)
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
all right Brat Pack…
By: Debbie Viess (amanitarita)
2011-03-26 13:02:14 CDT (-0400)

What did your microscopy work tell you about this little psath?

thanks to Oluna Ceska…
By: Debbie Viess (amanitarita)
2011-03-16 13:34:13 CST (-0500)

for tracking down the salient psath reference below.

Alexander Smith’s Psathyrella Monograph, pg. 104, P. barlae f. minor (now P. bipellis):


Created: 2011-03-11 20:58:10 CST (-0500)
Last modified: 2016-09-02 18:17:56 CDT (-0400)
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