Dictionary of Luminous Creatures

Bioluminescent Fungus: Bioluminescent fungi emit a greenish light at a wavelength of 520–530 nm. The light emission is continuous and occurs only in living cells.  Bioluminescence may occur in both mycelia and fruit bodies, as in Panellus stipticus and Omphalotus olearius, or only in mycelia and young rhizomorphs, as in Armillaria mellea.