Woodland forest polypore wild mushroom fungi growing on fallen white birch tree trunk descend right

woodland forest polypore wild mushroom fungi growing fallen birch tree trunk piptoporus betulinus parasite medicinal organic mushrooms nature medicine natural woods harvest autumn botany ecosystem shelf parasitic rotting seasonal plants park birch tree fungus bark decay nutrients magic white growth wilderness spore dense shade homeopathy holistic herbal species vegetation toadstool autumnal botanical