Cap: Usually present and well developed, but sometimes present merely as a folded-over edge above a spreading pore surface; up to 7 cm across and 6 cm deep; semicircular to kidney-shaped; often arranged in shelves and sometimes fused laterally with other caps; usually convex to planoconvex; very finely velvety when young, becoming bald with age; yellowish to orangish at first, becoming yellowish brown and eventually darkening to dark brown or black; often zoned; the margin thin and often wrinkled.
Pore Surface: Yellowish brown when young, becoming brown; with 3-5 angular pores per mm; tubes to 8 mm deep.
Flesh: Yellowish brown to reddish brown; corky; faintly zoned.
Chemical Reactions: Flesh black with KOH.
Spore Print: Yellowish to brownish.
Spores 5-6.5 × 3-4.5 µ; smooth; ellipsoid; hyaline to faintly yellowish in KOH; inamyloid or faintly dextrinoid. Hymenial setae scattered; to about 50 × 12 µ; fusoid; often with a swollen base. Setal hyphae absent. Hyphae thin- to thick-walled; 3-7 µ wide; simple-septate