A fungus (?) on a birch, Sheltowee Trail near Chimney Top Rock. Red River Gorge, Kentucky, November 6, 1999.
Malformed white birch bolete mushroom (bog bolete, Leccinum holopus) with a swollen stem damaged by gall-forming fungus near Kavgolovskoe Lake south from Oselki, 8 miles north from Saint Petersburg. Russia, September 23, 2015
White birch bolete mushroom (bog bolete, Leccinum holopus) damaged by fungus near Kavgolovskoe Lake south from Oselki, 8 miles north from Saint Petersburg. Russia, September 23, 2015
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
Rotten blackened tinder polypore mushrooms (bracket fungus, Fomes fomentarius) on a birch log in Lisiy Nos, west from Saint Petersburg. Russia, October 9, 2016
Tinder polypore mushrooms (bracket fungus, Fomes fomentarius) on a birch log in Dibuny, north-west from Saint Petersburg, Russia, October 23, 2016
Tinder conk mushroom (polypore fungus Fomes fomentarius) on a dead birch in Udelny Park. Saint Petersburg, Russia, February 12, 2017
Willow bracket fungus (Phellinus igniarius mushrooms) on a birch near Lisiy Nos, south from Saint Petersburg. Russia, February 18, 2017
Fungus (mushrooms) Phellinus laevigatus on a birch tree near Lisiy Nos, south from Saint Petersburg. Russia, February 18, 2017
Crust of fungus (mushrooms) Phellinus laevigatus on a birch tree near Lisiy Nos, south from Saint Petersburg. Russia, February 18, 2017
Texture of crust of fungus (mushrooms) Phellinus laevigatus on a birch tree near Lisiy Nos, south from Saint Petersburg. Russia, February 18, 2017
Thin crust of fungus (mushrooms) Phellinus laevigatus on a birch tree near Lisiy Nos, south from Saint Petersburg. Russia, February 18, 2017
Spreading fungus (mushrooms) Phellinus laevigatus on a birch tree near Lisiy Nos, south from Saint Petersburg. Russia, February 18, 2017
Willow bracket fungus (Phellinus igniarius mushrooms) on a birch tree in Yuntolovsky Park. Saint Petersburg, Russia, February 23, 2017
Tinder conk mushroom (polypore fungus Fomes fomentarius) on a birch in area of Dibuny - Pesochny near Saint Petersburg. Russia, March 4, 2017
Bracket fungus Red-Belt Conk (polypore mushroom Fomitopsis pinicola) on a birch in area of Dibuny - Pesochny near Saint Petersburg. Russia, March 4, 2017
Old jelly rot fungus (Phlebia tremellosa, Merulius tremellosus) on a birch tree in Sosnovka Park. Saint Petersburg, Russia, March 13, 2017
Big jelly rot fungus (Phlebia tremellosa, Merulius tremellosus) on a birch tree in Sosnovka Park. Saint Petersburg, Russia, March 13, 2017
Jelly rot fungus (Phlebia tremellosa, Merulius tremellosus) with snow on a birch tree in Sosnovka Park. Saint Petersburg, Russia, March 13, 2017
Decaying basidiome of jelly rot (Phlebia tremellosa, Merulius tremellosus) with a saprobic fungus Botryobasidium subcoronatum on a birch tree in Sosnovka Park. Saint Petersburg, Russia, March 13, 2017
Jelly rot fungus (Phlebia tremellosa, Merulius tremellosus) on a birch tree in Sosnovka Park. Saint Petersburg, Russia, March 13, 2017
Caps of jelly rot fungus (Phlebia tremellosa, Merulius tremellosus) on a birch tree in Sosnovka Park. Saint Petersburg, Russia, March 13, 2017
Jackrogersella multiformis (Annulohypoxylon multiforme) fungus (family Xylariaceae) on a birch near Lisiy Nos, west from Saint Petersburg. Russia, March 16, 2017
Small Witch s Broom (densely branched small twigs) on a birch induced by a parasitic fungus Taphrina betulina(?) near Morskaya, west from Saint Petersburg. Russia, March 16, 2017
Tinder conk mushroom (polypore fungus Fomes fomentarius) on a birch in Sosnovka Park. Saint Petersburg, Russia, March 20, 2017
Prostrate form of purple toothed polypore fungus (Trichaptum biforme) on a fallen birch in Sosnovka Park. Saint Petersburg, Russia, March 20, 2017
Prostrate form of purple toothed polypore fungus (Trichaptum biforme) covering a birch log in Sosnovka Park. Saint Petersburg, Russia, March 20, 2017
Fungus (mushroom) Cylindrobasidium evolvens growing on fallen birch leaves on peat in swampy area of Sosnovka Park. Saint Petersburg, Russia, March 23, 2017
Corticioid fungus on birch tree in Sosnovka Park. Saint Petersburg, Russia, March 23, 2017
Fungus (mushroom) Cylindrobasidium evolvens growing on fallen birch leaves taken from peat area in Sosnovka Park. Saint Petersburg, Russia, March 23, 2017
Birch polypore mushroom with a mold like ochre cushion fungus (Trichoderma pulvinatum) in Sosnovka Park. Saint Petersburg, Russia, March 27, 2017
Ochre cushion fungus (Trichoderma pulvinatum) on a birch polypore mushroom in Sosnovka Park. Saint Petersburg, Russia, March 27, 2017
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
Crust poroid fungus Phellinus(?) on a birch tree in area of Dibuny - Pesochny, near Saint Petersburg. Russia, June 3, 2017
Crust tinder fungus Phellinus(?) on a birch tree in area of Dibuny - Pesochny, near Saint Petersburg. Russia, June 3, 2017
Texture of Chaga fungus (Inonotus obliquus) on a birch in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 28, 2017
Hydnoid fungus Mycoacia aurea(?) on the underside of a rotten birch log in Sosnovka Park. Saint Petersburg, Russia, September 2, 2017
Soft porous fungus covering rotten birch bark in Sosnovka Park. Saint Petersburg, Russia, September 2, 2017
Some crustous fungus at the base of a birch tree in Sosnovka Park. Saint Petersburg, Russia, September 13, 2017
Some crustous fibrillous fungus on a birch tree in Sosnovka Park. Saint Petersburg, Russia, September 13, 2017
Birch woodwart fungus (Jackrogersella multiformis, Annulohypoxylon multiforme) on a stump in Sosnovka Park. Saint Petersburg, Russia, September 23, 2017
Bulgaria inquinans fungus on a birch on mushroom show in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, September 30, 2017
Some striped insects on a porous tree fungus near a road along north shore of Lake Somerville near Birch Creek Unit Somerville Lake State Park. Texas, March 14, 2018
Cedar apple rust fungus Gymnosporangium juniperi-virginianae on a twig of red cedar near a road along north shore of Lake Somerville near Birch Creek Unit Somerville Lake State Park. Texas, March 14, 2018
