Psilocybe heimii is a species of psilocybin mushroom in the family Hymenogastraceae. Described as new to science in 1978 by Gastón Guzmán, it is found in the subtropical forests of Mexico. It is named in honor of French mycologist Roger Heim.
- Guzmán G. (1978). "Further investigations of the Mexican hallucinogenic mushrooms with descriptions of new taxa and critical observations on additional taxa". Nova Hedwigia. 29 (3–4): 625–44.