Stereum complicatum

Common Name: None.
Description: Bracket 0.3-1.5 cm across, fan-shaped or semicircular, with wavy margin; pinkish or orangish to cinnamon fawn or grayish, with a paler whitish margin; silky-hairy, concentric zones and furrows, smooth and shiny near margin.
Habitat: in overlapping or laterally fused groups on dead twigs and stumps of hardwoods, especially oak. Found throughout North America except the Rocky Mountains.
Edible: Not edible.

Source: Mushrooms of North America by Roger Phillips.