Psilocybe aztecorum
Psilocybe aztecorum is a species of psilocybin mushroom in the family Hymenogastraceae. The fungus grows on decomposing woody debris and is found in mountainous areas at elevations of 2,000 to 4,000 m. The mushrooms have convex to bell-shaped caps 1. 5–2 cm in diameter, atop slender cylindrical stems that are up to 7. 5 cm long.