The Content of Psilocybin in Norwegian Psilocybe semilanceata
Planta Medica July 1, 1981 Anders Christiansen, Knut Rasmussen, Klaus Høiland 20 citations
The mushroom Psilocybe semilanceata, which contains hallucinogenic indole alkaloids, has been used as a narcotic drug in Norway. Its psilocybin content, habitats, and distribution across the country were investigated. The mushroom grows on grassy sites throughout most of Norway from mid-August to mid-October. Psilocybin content in dried mushrooms varied considerably, from 0.17 to 1.96%. Smaller mushrooms had the highest percentage concentration, while larger mushrooms had the highest total amount in milligrams. The psilocybin content makes P. semilanceata a potent hallucinogenic drug.