How to identify it?
Cap
Cap 4-12 cm across, convex at first, becoming flatter and often depressed; ocher-buff to olive-buff, becoming tan to brown; surface smooth, finely downy, sticky when wet; incurved at the margin. Flesh thick, soft and moist, yellowish. Taste acidic.
Gills
Gills decurrent, ocher-buff to brown, close or crowded, turn rusty brown when damaged.

Scientific Classification

Phylum
Club fungi Class
Mushroom-forming fungi Order
Boletes and allies Family
Paxillaceae Genus
Rollrims Species
Brown roll-rim