Abuse of the mushroom Panaeolus foenisecii.
BMJ February 16, 1980 P Cooles 18 citations
Reports on the presence of psilocybin and psilocin in the mushroom Panaeolus foenesecii are inconsistent; both compounds have been detected in some samples but not in others. This mushroom is typically regarded as containing latent psilocybin, meaning that psilocybin and psilocin may not be present in every individual specimen.