Observation 3100: Coprinopsis lagopus (Fr.) Redhead et al.
When: 2005-10-26
Collection location: Humboldt Co., California, USA [Click for map]
Who: Don Bryant (agaric)
No specimen available
Notes:
These come up, mature, and deliquesce in a few hours. Keyed using Polycot Key to Mushrooms West of the Rockies.