Marasmius oreades, the Scotch bonnet, is also known as the fairy ring mushroom or fairy ring champignon. The latter name tends to cause some confusion, as many other mushrooms grow in fairy rings.
"You can't give up hope just because it is hopeless! You gotta hope even more, and cover your ears, and go: "Blah blah blah blah blah blah blah blah!""
Pizza mushroom
Fairy Mushroom