Drug Enforcement Administration puts them http://www.cesar.umd.edu/cesar/drugs/psilocybin.asp Psilocybin/Psilocyn according to the Center for Substance Abuse Research. http://www.cesar.umd.edu/cesar/drugs/psilocybin.asp http://www.cesar.umd.edu/cesar/drugs/psilocybin.asp Center for Substance Abuse Research hallucinations http://www.cesar.umd.edu/cesar/drugs/psilocybin.asp http://www.cesar.umd.edu/cesar/drugs/psilocybin.asp psilocybin and psilocyn psilocybin mushrooms. http://www.cesar.umd.edu/cesar/drugs/psilocybin.asp 1950s http://www.cesar.umd.edu/cesar/drugs/psilocybin.asp http://www.cesar.umd.edu/cesar/drugs/psilocybin.asp not scheduled Center for Substance Abuse Research http://www.cesar.umd.edu/cesar/drugs/psilocybin.asp CESAR same group of hallucinogenic fungi