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When: 2008-07-30

Collection location: Madison Heights, Pasadena, California, USA [Click for map]

Who: Jason Hollinger (jason)

Specimen available

small mushrooms, densely clustered in lawn
ST: hollow, 40-50 × 4-6 mm, white, shiny, smooth to fainly floccose, delicate, fibrous
CAP: 15-25 mm wide, conical to bell-shaped opening to plane with slight umbo, dry, smooth or with brownish particles when young, buff to brownish, cuticle cellular and possibly an epithelium, cells round ~13-17 µ
VEIL: partial veil leaving very delicate movable membranous ring, ring disappearing quickly on most
GILL: pale whitish when young becoming deep brown, adnate, close, no pleurocystidia found, cheilocystidia: nearly round balloons on narrowed stalks, 9-13 × 11-22 µ, some encrusted with tiny clear colorless granules
SPORE: print dark brown, irregularly oblong, smooth, brown, some texture inside, germ pore is nearly invisible if it is in fact there (there is a slight thinning of wall near one end if you focus just right), 7-9 × 4-5 µ

This was very similar to, and only ~100 feet from, the cluster I reported from the day or two before, however its cheilocystidia are different (I did many sections of the gills of both to confirm several times). Also these spores have much fainter to almost non-existent germ pore, and the ring is much less persistent.

Note: microscope not necessarily calibrated correctly.


Spores, at 1000x, in water.
Edge of gill, at 400x, in water, balloons are presumably cheilocystidia.
Cheilocystidia, at 1000x, in water.
Cheilocystidia, at 1000x, in water.
Gill section showing two faces of gills, at 400x, in water. I see no pleurocystidia here.

Proposed Names

29% (1)
Used references: Going on Douglas Smith’s suggestion for the other very similar observation.
46% (2)
Recognized by sight: Veil remnants visible
Based on microscopic features: Spore size matches, lack of plerocystidia matches, cheilocystidia shape matches saccate portion of the description on mushroomexpert.

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= Observer’s choice
= Current consensus


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