Thin-walled Maze Polypore - Daedaleopsis confragosa

"Daedaleopsis confragosa" is a species of polypore fungus in the family Polyporaceae. A plant pathogen, it causes a white rot of injured hardwoods, especially willows. The fruit bodies are semicircular and tough, have a concentrically zoned brownish upper surface, and measure up to 20 cm in diameter.