mushroom tinder fungus on the trunk of a diseased tree in a deciduous forest

mushroom fomes fomentarius polyporus boletus ungulina fomentaria griseus inedible parasite disease trunk forest tree foliar wet medical nutritional supplements bark wood cracks perennial nature trace elements disputes pulp aspen oak alder birch beech viruses bacteria infections biology mycelium moss journey tourism flora infection summer environment trees park old product tincture powder blood sponge dead microorganism element form tinder fungus diseased deciduous forest eastern europe poland