How to identify it?
Cap
Cap 1-5 cm across, hemispherical; ivory to cream, buff, grayish, tan, or reddish brown; surface smooth and silky.
Flesh
Flesh insubstantial. Odour and taste not distinctive.

Scientific Classification

Phylum
Club fungi Class
Mushroom-forming fungi Order
Gilled fungi Genus
Panaeolus Species
Petticoat mottlegill