Psilocybe semilanceata, commonly known as the liberty cap, is a psychedelic (or “magic”) mushroom that contains the psychoactive compounds psilocybin and baeocystin. Of the world’s psilocybin mushrooms, it is the most common in nature and despite its small size, Psilocybe semilanceata is considered “moderately active to extremely potent”.
Psilocybe semilanceata is a saprobic fungus, meaning it obtains nutrients by breaking down organic matter.
The mushroom grows solitarily or in groups on the ground, typically in fields and pastures. It is often found
in fields that have been fertilized with sheep or cow dung, although it does not typically grow directly on the dung. The mushroom is also associated with sedges in moist areas of fields, and it is thought to live on the decaying root remains.