Occurrence of psilocybin in the sporophores of Psilocybe semilanceata Transactions of the British Mycological Society October 1, 1969 Peter G. Mantle, E. S. Waight 16 citations No Summary DOI: 10.1016/s0007-1536(69)80066-5 (opens in new tab) Psilocybin Biology Hallucinogen Pharmacology