birch polypore, piptoporus betulinus, fomitopsis betulina. a mushroom grows from the trunk of a tree

autumn betula betulina betulinus birch brown colourful detail ecology ecosystem environment fall fomitopsis forest fungal garden growing horizontal land landscape mushroom natural nature nutrient outdoors outside parasite park people piptoporus plant polypore rural season soft timberland tree trunk twig white wild wood