Abundisporus quercicola

About

Abundisporus quercicola is a species of bracket fungus that grows on living oaks in temperate forests in the foothills of the Himalaya. The fruit bodies are perennial, grey to black above with concentric markings and white below. The fungus grows to 7 cm wide and 5 cm thick, projecting up to 5 cm from the substrate. The basidiospores are yellow.

Summary from Wikipedia