Laetiporus sulphureus

Common Name: Sulphur Shelf or Chicken of the Woods
Description: Fruit body annual. Bracket up to 40 cm across,; flat, fan-shaped or irregularly semicircular, thick and fleshy, often with an undulating rounded margin; lemon yellow to orange, fading to straw or pale brown and bleaching white in old, deteriorating specimens; minutely felty to smooth, radially furrowed.
Habitat: singly or in large overlapping clusters on stumps, trunks, and logs, of dead or living deciduous and coniferous trees. Found in many areas of North America from the Midwest eastward, in the Pacific Northwest, and in California.
Edible: Excellent.

Source: Mushrooms of North America by Roger Phillips.