A large, fleshy polypore, dark grey/brown when young, becoming lighter gray in age. (Some varieties fade to a light yellow at maturity). Fruit body is composed of multiple, overlapping caps, 2-10 cm. in diameter, arising from branching stems, eccentrically attached, and sharing a common base. Young fruitbodies are adorned with fine grey fibrils. The pores on the underside of the caps are white.