M. alba M. elegans M. lunulatospora M. microspora M. paludosa M. serpentina Mitrula is a genus of fungi in the family Sclerotiniaceae[1] first described by Elias Magnus Fries, in his Systema Mycologicum (1821).

The common name for the matchstick-like fungus is either swamp beacon (US) or bog beacon (GB)[2] refers to the white stipe with yellow fruiting cap.

The genus is notable for growing on decaying vegetation in shallow water.

[3] The saprobiontic fungi depend on wet or boggy habitats, with plenty of rotting vegetation.

[2] The aquatic discomycete Mitrula can be found in Europe, Asia, and North America.