Created: 2008-09-11 12:19:58

By: Paul Derbyshire (Twizzler)

Summary: Panaeolus, Psathyrella, or Psilocybe

Comment: But probably not Panaeolus; I don’t see much mottling on the gills.

Used a key based on spore print color, gill attachment, and veils; your mushroom has no sign of any veils at maturity, has notched attached gills, and has a black spore print, to judge by the photos.

The closest species-match in my field guide is Psilocybe squamosa, but that has a rough stem. None of the species of those three genera listed in my field guide are described as having a rooting stem.

Information about habitat might help narrow things down further.