hoof fungus or tinder fungus (fomes fomentarius), close up on tree trunk.

tinder fungus fomes fomentarius growing tree wild forest autumn background bark beautiful beauty biology bracket brown closeup color colorful detail fall forest fungal fungi fungus green growth hoof inedible macro medicine moss mushroom mushrooms mycology natural nature old organic outdoor outdoors parasite plant polypod polypore pores snow stem summer texture tinder white wild winner wood