Distribution: Northern North America, more common east than west.

Habitat: Hardwood forests and woodlands.

Substrate: Hardwoods.

Conservation Status: Not of concern

Large woody bracket or shelf fungus, may also be resupinate. Cap is brown to black, crusted, grooved, rough, may have mosses growing on it. Pore layer is yellowish-, golden- or rusty-brown, pores very small, variably shaped from elongate to labyrinthine to tooth-like.