On the edge of a lawn stands this beautiful mushroom. But we don't see what happens underground. The mushroom itself is the fruit-body and forms only a small part of the fungus, most of which is located underground in the form of fungal threads (hyphens), which together are called the mycelium. The rapid growth, the whimsical shapes and the colors of mushrooms were often attributed to sorcery in the past. For example, there are mushrooms with names (in Dutch) such as devil's egg, satanic bolete and witches bolete. A fairy ring is a naturally created circle of mushrooms, because the hyphens grow radially and the older fungal threads die. Some mushrooms, such as the champignon, are edible, but other species can be highly toxic, or have psychoactive or medicinal qualities.