When: 2009-08-07

Collection location: Swanton Rd., Santa Cruz Co., California, USA [Click for map]

Who: Alan Rockefeller (Alan Rockefeller)

Specimen available

Quadracer collection. Photos and more info are in this thread.

Spore sizes:
13.06 × 8.07
12.65 × 7.45
12.30 × 7.55
12.83 × 7.29

Cheilocystidia abundant, often with a rounded knob on the end.


Spores 1000x, 8.7 micron divisions
Spores 1000x, 8.7 micron divisions
Spores 1000x, 8.7 micron divisions
Spores 1000x, 8.7 micron divisions
Sulphidia on gill face
Sulphidia on gill face

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= Observer’s choice
= Current consensus


Add Comment
Not semiovatus
By: Alan Rockefeller (Alan Rockefeller)
2009-08-13 00:43:14 CDT (-0400)

These mushrooms are definitely not Panaeolus semiovatus var. phalaenarum. One reason is the spore size – That species has spores that average 20 micrometers long, while these are no longer than 14 micrometers. Also the spore shape is wrong for P. semiovatus var. phalaenarum – that species has relatively narrow spores for Panaeolus, while these spores are relatively wide. Another reason is the lack of veil remnants around the cap margin, which is an identifying feature of Panaeolus semiovatus var. phalaenarum. Panaeolus antillarum is a much closer match. Your concern about links to the shroomery is a bit unusual since you have posted there over eight thousand times.

Created: 2009-08-12 03:08:53 CDT (-0400)
Last modified: 2018-03-22 05:08:17 CDT (-0400)
Viewed: 196 times, last viewed: 2020-05-13 00:13:36 CDT (-0400)
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