Known as magic mushrooms, shrooms, mushies, psychedelic mushrooms, psychotropic mushrooms or psilocybin, these mushrooms cause differences in mood, perception and behavior that are commonly known as tripping..These types of mushrooms belong to the genus Psilocybe. single mushroom contains anywhere from 0.2 to 0.4 percent psilocybin. Magic mushrooms are one of the most widely used recreational psychotropic drugs because they can be found in the wild or grown fairly easily and inexpensively.