Coprinellus micaceus

When young the caps are a tan color and obtusely conical (slightly cone-shaped). As they mature they become tawny and campanulate (bell-shaped). The surface of the cap usually contains granular remnants of the universal veil. These salt-like granules glisten in the light giving the mushroom its common name. However, they can wash away by rain. The cap margins are plicate (pleated or umbrella-like ) and extend the majority of the cap. After spore dispersals, mica caps go through deliquescence—a process of deterioration where the caps appear to melt away in an inky black goo. As deliquescing, the margins will appear eroded, split, and form a revolute (roll upwards) shape. Finally, the cap will completely dissolve.

The gills are even and closely spaced. The are pale-brown when young and eventually turn black. Even appearing purplish in the right light. They are adnexed (narrowly attached to the stem), broad and fragile. During deliquescence, the gills are first to dissolve.

The stems are fragile, equal, and hollow. White to somewhat tan and slightly fibrous but appear smooth to the naked eye. There is no indication of an annulus (veil) or ring zone.

The spores are black. If taking a spore print, do not wait too long because the cap will turn into a puddle of black inky goo.

A cross-section reveals a straight shaped margin on young specimens. As the mica cap matures the shape will become revolute (roll upwards). The flesh of the cap is cream and differs from the white flesh of the stem. Which is unique to Coprinellus micaceus as the majority of the Coprinellus genus have consistent flesh colors throughout the mushroom.