Gymnopilus purpuratus is mushroom which grows in clusters on dead wood, pig dung and wood chip mulch. It is widely distributed and has been recorded in Argentina, Australia, Chile, the UK and Germany. It has a rusty orange spore print and contains the hallucinogen psilocybin. A chemical analysis done by Jochen Gartz found that this species contains 0.34% psilocybin, 0.29% psilocin and 0.05% baeocystin.