related to large bracket in which the upper surface, in shades of yellow, red-brown to black, resembles an unvarnished crust. It has a thick, stem-like attachment and the lower surface is white to cream with minute pores. A parasite on a variety of trees.
Pore Surface White, becoming dirty yellowish or dingy brownish to olive in age; bruising brown; with 4-6 tiny (nearly invisible to the naked eye) circular pores per mm; tubes in layers (a new layer is added each year), separated by brown tissue, with each layer 4-12 mm deep.
Usually absent; if present, lateral and stubby.
Grows in woods
Grows on the trunks of deciduous trees, where it causes an intensive white rot.