WELLINGTON New Zealand Wednesday approved the medicinal use of psilocybin, a hallucinogenic compound notably found in so-called " magic mushrooms ." Deputy Prime Minister David Seymour said rules had been relaxed so psilocybin could be used to treat certain types of depression. Psilocybin is a naturally occurring psychedelic compound found in some species of mushroom and can cause hallucinations and an altered state of mind. "Psilocybin remains an unapproved medicine, but a highly experienced