the birch polypore (mitosis betulina)

piptoporus betulinus polypore betulina wildlife mitosis bracket common fungus branch nature autumn winter animal flower spring insect birch razor strop trunk plant tree leaf wood twig soil bird forest bark beige betulina birch bracket polypore boletus brown chaga collection decay environment fall fungal fungi fungus green grey growing growth healthy illness medicinal mushroom mushrooms mycelium mycology natural nature organic outdoor outdoors parasite park plant polypores strop shelf stem toadstool tree vegetable white wild wilderness