Psilocybe subaeruginascens aka P. aerugineomaculans is a species of psilocybin mushroom in the Hymenogastraceae family. It is a close relative to hallucinogenic species Psilocybe stuntzii, P. subfimetaria, and Psilocybe ovoideocystidiata. Its epithet contains the Latin root “aeru- “ meaning “blue-green” which probably refers to its prominent bluing.
Because it shares similarities with the epithet of Inocybe aeruginascens, one wonders if it contains the rare compound aeruginascin. Aeruginascin is an analog to psilocybin and is closely related to the frog skin toxin bufotenine (5-HTQ), a potent 5-HT3 receptor agonist. This compound, identified by chemist and mycologist Jochen Gartz in the eighties, is believed to be the equivalent of what CBD is to THC.