|gills on hymenium|
|cap is convex or campanulate|
|hymenium is adnate or sinuate|
|stipe has a cortina|
|spore print is blackish-brown to purple|
|ecology is saprotrophic|
Psilocybe fimetaria is a psilocybin mushroom, having psilocybin and psilocin as main active compounds.
Psilocybe fimetaria is found growing solitary to gregariously on horse or cow dung, in grassy areas or in rich soils, and often fruits in large rings, from September to November, known from Canada (British Columbia and New Brunswick), the Pacific Northwest (Washington, Oregon, and Idaho), Chile, Great Britain, and Europe. Widely distributed but not very common.