This paper deals with the first record of the European species Psilocybe magica from the North American continent. It was found growing in troops among mosses in a coniferous forest, in North Cascades National Park (Washington State, U.S.A.). Its infraspecific variation and relationships with Psilocybe montana are discussed.
Guzmán G., Noordeloos M. E., Trappe J. M. (2008): First discovery of the European Psilocybe magica in America. – Czech Mycology 60(2): 193–196.