Cap: perennial bracket, broadly attached to substrate; 100 - 600 mm diameter and 10 - 90 mm thick; upper surface irregular with undulations and occasionally knobbly; tobacco brown, sometimes faintly concentrically zoned; margin white when fresh.

Stipe: absent.

Pores: white; round; 5 - 6 pores per mm; pore surface often flat and horizontal to the ground; turning brown when scratched.

Flesh: hard, woody, dark brown but white in pore structure.

Smell: fungoid.

Spore print brown, red brown.

Spores:

Notes: This fungus is recognized by its large matt, tobacco brown fruiting body which is laterally attached and white pores which bruise red brown when scratched.