Mycena alphitophora is a species of agaric fungus in the family Mycenaceae.

Its small, white, delicate fruit bodies are characterized by the powdery coatings on the surfaces of both the cap and stipe.

The species was first described as Agaricus alphitophorus by Miles Joseph Berkeley in 1877, based on specimens collected in 1873 from the Devonshire Marsh, a peatland in Bermuda.

Leelavathy defined the varieties distincta and globispora from southern India in 1989.

Mycena stylobates has a pruinose stipe that arises from a basal disc, but the cap is up to 10 mm and lacks white granules.