Panaeolus foenisecii


Panaeolus foenisecii, commonly called the mower's mushroom, haymaker or brown hay mushroom, is a very common and widely distributed little brown mushroom often found on lawns. In 1963 Tyler and Smith found that this mushroom contains serotonin, 5-HTP and 5-hydroxyindoleacetic acid. In many field guides it is erroneously listed as psychoactive, however the mushroom does not produce any hallucinogenic effects.
It is sometimes mistaken for the psychedelic Panaeolus cinctulus or Panaeolus olivaceus both of which share the same habitat and can be differentiated by their jet black spores. This is probably why Panaeolus foenisecii is occasionally listed as a psychoactive species in older literature.

Description

The following two images are of Panaeolus foenisecii in the wild with two magnifications of the spore print.