Mycena leptocephala (Pers.) Gillet (1876)

This is one of the most common suburban Mycenas. The combination of dark pileus with bloom in dry weather and the pronounced bleachy odor help define it. l

Unusual clustered habit in some cases

The bloom on the surface in dry conditions is very distinctive.
Cheilocystidia                                                                    Spores: 8-10x4.2-5.6 Lamellar trama vinescent in Melzer's

Caulocystidia