How to identify it?
Cap
Cap 1-5 cm across, initially bell-shaped, flattening; reddish or brownish purple; surface smooth to flocci. Flesh thin, fragile, purplish. Odour and taste not distinctive.
Gills
Gills adnexed, purplish, becoming dark purple brown to dark gray, close or distant, with whitish edges.

Scientific Classification

Phylum
Club fungi Class
Mushroom-forming fungi Order
Gilled fungi Family
Coprinaceae Genus
Brittlestems Species
Maroon brittlestem