Agaricus plutonia Psilocybe plutonia is a small psilocybin mushroom of the family Hymenogastraceae, believed to contain psilocybin and psilocin.

An older synonym is Agaricus plutonia.

The word plutonia comes from the Latin words plutonian or plutonic.

Perhaps in connection with the dark color of the mushroom.

Psilocybe plutonia may be found growing solitary or gregarious, from late June through February, on rotted wood or in soil with woody material, in tropical forests, from Brazil, Colombia, Venezuela and Cuba, often near sea level or in lower elevations, although widely distributed, it is not found often.