The Rosy Bonnet, Mycena rosea, is a bioluminescent mushroom that can be found in leaf litter beneath deciduous trees. It is known for its attractive appearance and can be found in several areas around the Barff; it is often found in coniferous forests on acidic soil. The mushroom is poisonous and contains the toxin muscarine, making it unsafe for consumption. It is important to note that the Rosy Bonnet is not considered edible and should be avoided by those looking to collect mushrooms for food.