Extract from Wikipedia article: Fomitopsis betulina (previously Piptoporus betulinus), commonly known as the birch polypore, birch bracket, or razor strop, is a common bracket fungus and, as the name suggests, grows almost exclusively on birch trees. The brackets burst out from the bark of the tree, and these fruit bodies can last for more than a year. Technically, it is an edible mushroom, with a strong, pleasant "mushroomy" odor but a bitter taste. The velvety cut surface of the fruit body was traditionally used as a strop for finishing the edges on razors, and also as a mounting material for insect collections.
Birch polypore mushroom Piptoporus betulinus (bracket fungus Fomitopsis betulina, Russian name Trutovik) in Sosnovka Park. Saint Petersburg, Russia, August 25, 2016
Birch polypore mushroom Piptoporus betulinus (bracket fungus Fomitopsis betulina, Russian name Trutovik) in Oselki, south from Saint Petersburg, Russia, August 29, 2016 Unnamed Road, Oselki, Leningradskaya oblast', Russia, 188665
Birch polypore mushroom Fomitopsis betulina (Piptoporus betulinus) in area of Dibuny - Pesochny near Saint Petersburg. Russia, March 4, 2017 Unnamed Road, g. Sankt-Peterburg, Russia, 197758
Birch polypore mushroom Fomitopsis betulina (Piptoporus betulinus) in Sosnovka Park. Saint Petersburg, Russia, March 20, 2017 Unnamed Road, Sankt-Peterburg, Russia, 194064
Birch polypore mushroom Piptoporus betulinus (bracket fungus Fomitopsis betulina) in area of Blizhnie Dubki near Lisiy Nos, west from Saint Petersburg. Russia, April 7, 2017 Polyanskaya dor., g. Sankt-Peterburg, Russia, 197755
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Search of mushroom species for given keywords "Fomitopsis betulina" was done through
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