Ключевые слова: affected, areas, autumn, bark, beautiful, biology, birch, brown, caucasus, closeup, flora, fomitopsidaceae, fomitopsis, forest, fungus, germinate, green, grey, growing, infection, lichen, ligneous, macro, medicinal, medicine, moss, mushroom, mushrooms, mycology, natural, nature, old, orange, outdoor, parasite, pinicola, plant, reserve, round, russia, saprophyte, science, tree, trunk, wild, wood, woody, yellow,