How to identify it?
Cap
Cap 1-6 cm across, conical; light brown to dark purple brown; surface hygrophanous, smooth; with a striate margin when moist. Flesh thin, brownish, turns bluish or black when damage. Odour and taste not distinctive.

Scientific Classification

Phylum
Club fungi Class
Mushroom-forming fungi Order
Gilled fungi Family
Hymenogastraceae Genus
Psilocybe Species
Psilocybe subaeruginosa