Woodland forest polypore wild mushroom fungi growing on fallen white birch tree trunk pull back

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