Cap 30-80 mm broad x 15-60 mm radius x 1-2 mm thick, fan-shaped, margin often wavy or lobed, radially ridged, tough and leathery, with concentric zones of brown, reddish brown, yellowish brown, orange, green gray, black, and a white margin. Pores round, extremely tiny, 9-11 per mm, white to straw-colored; tubes in a single layer 0.25 mm deep. Stem lateral, 5-15 x 3-5 mm, solid, black. Spore deposit white.