In the mushroom cultivation community, the Penis Envy variety is notorious. Immediately one might assume this is due to its phallic shape, though many also consider it a variety that stands out for its potency. In cultivation forums, you’ll often read the phrase “a cube is a cube” referring to the fact that despite the many different Psilocybe cubensis varieties available, they’re mostly similar in terms of both growing requirements and potency. However many consider Penis Envy to be of particularly high potency, something that seems to be confirmed by the work of Oakland Hyphae and the Psilocybin Cup, leading to many shrooms aficionados to caveat the commonly uttered phrase “A cube is a cube… except for Penis Envy.”