Cap: campanulate; 5– 15mm diameter; strongly fibrillose; dark grey overlain with black fibres; margin entire.

Stipe: cylindrical; 20 - 50 × 2 - 4 mm; glabrous; black.

Gills: free; close; white; lamellulae in three series.

Flesh: thin, white.

Spore print: white.

Spores:

Notes: this Mycena is characterized by its fibrillose blackcap which made it a doubtful candidate for the genus, but the spore print appears to be white. However, microscopic and other details are needed to make a firm determination.