How to identify it?
Cap
Cap 3-7 cm across, oval at first, becoming conical; ocher or buff to tan; surface striate or shallowly fluted; dusted with small, whitish to brown, mealy scales.

Scientific Classification

Phylum
Club fungi Class
Mushroom-forming fungi Order
Gilled fungi Family
Coprinaceae Genus
Coprinellus Species
Firerug inkcap