Mycena olivaceomarginata

Mycena olivaceomarginata is a species of agaric fungus in the family Mycenaceae. Originally described as "Agaricus olivaceomarginata" by English mycologist George Edward Massee in 1890, he transferred it to "Mycena" in 1893. Found in Europe and North America, the mycelium of the fungus is bioluminescent.
It was described from Great Britain.