Cerrena unicolor (Bull. ex Fr.) Murr. Cap 0.5-7.5cm across, starts as a spreading resupinate, then forms crowded, often overlapping brackets; white to gray; thin; with dense covering of stiff hairs, often zoned and with covering of algae on upper surface. Tubes 0.4-4mm deep, mazelike, becoming tooth-like or more rarely pore-like; whitish. Pores 2-3 per mm, white to gray. Flesh thin, tough; white. Spores ellipsoid, smooth, 4.5-5.5 x 2.5-3.5µ. Deposit white. Habitat on wood, mostly deciduous. Found throughout northern North America into the Southeast and Midwest. Season all year. Not edible.