rhamphotheca:

Panellus stipticus, aka “Bitter Oyster Fungus” is a common and widely distributed (Asia, Europe, North America, Australia) species of fungus that grows on decaying deciduous trees, especially beech, oak, and birch. In some areas, it is bioluminescent, and the fruit bodies of these strains will glow in the dark—an effect known as foxfire—when fresh or sometimes when revived in water after drying.

(photo: Ylem)              (via: Wikipedia)