large parasitic mushroom tinder fungus grows on trunk. true polypore causes.

attack bark big biology closeup conk cracks deadwood decay deciduous decomposition degradation destroys devil39aph39s edges flora fomentarius fomes forest fungal fungus gray grow grows growth hoof hooves ice inedible large man matte mushroom nature old parasite parasitic plant polypore process rot rotten rotting skin stem timber tinder tree true trunk uneven wavy white wild wood woodland