When: 2007-10-26

Collection location: Petaluma, Sonoma Co., California, USA [Click for map]

Who: Darvin DeShazer (darv)

No specimen available

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Proposed Names

55% (1)
Recognized by sight: Lot more work needed, no specimen no name…

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Add Comment
By: Erin Page Blanchard (CureCat)
2008-03-27 19:29:18 CST (-0600)

When I have looked at the attachment of P. gracilis the lamelle appeared to be free, or unattached to the stipe, however some sources describe the attachment as adnate, or broadly attached to the stipe. So I will have to look more closely next time and perhaps get a few good photos.
The important distinction is of course the attachment of the gills of Psathyrella gracilis compared with Panaeolina foenisecii. Whether free or adnate, there is still an observable difference compared to the emarginate attachment of P. foenisecii.

By: Alan Rockefeller (Alan Rockefeller)
2008-03-27 01:46:29 CST (-0600)

By free gills do you mean adnexed?

By: Erin Page Blanchard (CureCat)
2008-03-24 15:32:38 CST (-0600)

Panaeolus have emarginate gill attachment, where as Psathyrella gracilis has free gills.

The stipe of Panaeolus species are also usually more opaque and stiff compared to the watery, brittle stipe of Psa. gracilis.