西洛西宾蕈类（英语：psilocybin mushroom），即裸盖菇，俗称迷幻蘑菇、神奇魔菇或魔菇，是含有裸盖菇素和脱磷酸裸盖菇素等迷幻物质的蕈类。它们在生物属分类上涵盖田头菇属（Agrocybe）、锥盖伞属（Conocybe）、灰斑褶菇属（Copelandia）、盔孢伞属（Galerina）、老伞属（Gerronema）、裸伞属（Gymnopilus）、韧伞属（Hypholoma）、丝盖伞属（Inocybe）、小菇属（Mycena）、斑褶菇属（Panaeolus）、光柄菇属（Pluteus）及裸盖菇属（Psilocybe），总共约190种，其中又以裸盖菇属为大宗。

Psilocybin mushrooms, also known as psychedelic mushrooms, are mushrooms that contain the psychedelic compounds psilocybin and psilocin. Common colloquial terms include magic mushrooms and shrooms. It is used mainly as an entheogen and recreational drug whose effects can include euphoria, altered thinking processes, closed and open-eye visuals, synesthesia, an altered sense of time and spiritual experiences. Biological genera containing psilocybin mushrooms include Copelandia, Galerina, Gymnopilus, Inocybe, Mycena, Panaeolus, Pholiotina, Pluteus, and Psilocybe. Over 100 species are classified in the genus Psilocybe.