How to identify it?
Cap
Cap 0.5-5 cm across, sector, semicircle or irregular; gray, ocher, brown, or red-brown, sometimes green-tinted by algae; surface finely hairy. Flesh insubstantial, tough. Odour and taste not distinctive.
Under surface
Undersurface yellowish to yellow-brown or orange-brown.

Scientific Classification

Phylum
Club fungi Class
Mushroom-forming fungi Order
Russulales Family
Crusts Genus
Leaf fungus Species
Hairy curtain crust