Psathyrella piluliformis (Bull.) P.D. Orton (1969)
Syn: Psathyrella hydrophila

This species is distinguished by its small spores and fibrillose-cortinate partial veil, which often leaves an entire band on the pileus margin. It usually has a strongly cespitose habit, almost always lignicolous.

Spores: 4-5x2.8-3.7µ, very small for Psathyrella