From 140 species of genus Psylocibe about 80 have hallucinogenic properties. This paper presents the morphology of these fungi and the mycological methods of their identification. According to information of users, the normal dose is 5-30 fresh wild fungi or about 0,5-2 gram of dried wild fungi tissue, but a select type of mycelium from a glass culture may have significantly higher contents of psilocybine. The effective time on the human brain is about 4-5 hours. The toxic dose of psilocybine is unknown, but genus Psylocibe may be mistaken with other, similar, very toxic fungi.