Red List Status -
Cap: convex; 2 – 12 mm diameter; dry; with erect pyramidal spines; white; dentate margin.
Stipe: cylindrical; 5 - 15 × 0.5 - 1 mm; hyaline, transluscent; attached to substrate by a distinct white mycelial pad.
Gills: free; moderately crowded; white.
Flesh: thin, white.
Spore print: white.
Spores: ellipsoid; 8 – 10 × 5 – 6; weakly amyloid.
Notes: this Mycena is characterized by is white cap with distinctive erect pyramidal spines and a hyaline stipe with a white basal pad. It is in section Sacchariferae. Desjardin describes it without a basal disc so this collection might be an undescribed species.