蘑菇, 菌 .. Hen-of-the-wood ? by Peter Suk Sin Chan 陳叔善

This is so cool, may be it is  the so called  Hen-of-the-wood

Grifola frondosa is a polypore mushroom that grows in clusters at the base of trees, particularly oaks. The mushroom is commonly known among English speakers as hen of the woods, hen-of-the-woods, ram's head and sheep's head. Wikipedia

 Grifola frondosa