How to identify it?
Cap
Cap 1.5-4 cm across, bell-shaped; iridescent pale blue; surface hygrophanous, smooth. Flesh thin, brittle, turns blue when damage. Odour and taste not distinctive.
Gills
Gills adnexed to adnate, gray to black, and usually mottled, moderately crowded.

Scientific Classification

Phylum
Club fungi Class
Mushroom-forming fungi Order
Gilled fungi Genus
Panaeolus Species
Blue meanies