Interior of Birch House in Gatchina Park. Gatchina, a suburb of Saint Petersburg, Russia, June 20, 2009
Tinder bracket mushrooms Pycnoporellus fulgens on birch logs in Sosnovka Park. Saint Petersburg, Russia, July 6, 2017
Brown birch bolete mushrooms (Leccinum scabrum) in Gardens of Polytechnic Institute. Saint Petersburg, Russia, August 19, 2017
Birch milkcap mushrooms (Lactarius tabidus) in Dibuny, near Saint Petersburg. Russia, August 20, 2017
Brown birch bolete mushroom (Leccinum scabrum) on roadside in Petiayarvi, 50 miles north from Saint Petersburg. Russia, August 30, 2017
Some crustous fibrillous fungus on a birch tree in Sosnovka Park. Saint Petersburg, Russia, September 13, 2017
Caps of artist s bracket mushrooms (Ganoderma applanatum) on a birch in Sosnovka Park. Saint Petersburg, Russia, August 4, 2017
Road through birch forest in Sosnovka Park. Saint Petersburg, Russia, May 17, 2011
Corner interior of Birch House in Gatchina Park. Gatchina, a suburb of Saint Petersburg, Russia, June 20, 2009
Chaga mushroom (Inonotus obliquus) on a birch tree in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, March 2, 2017
Plafond of Birch House in Gatchina Park. Gatchina, a suburb of Saint Petersburg, Russia, June 20, 2009
Pond Karasiovoe Ozero and birches in northern area of Sosnovka Park in mist. Saint Petersburg, Russia, June 26, 2010
Birch forest from Listvennaya Alley in Sosnovka Park. Saint Petersburg, Russia, September 29, 2015
Birch alley in eastern part of Sosnovka Park. Saint Petersburg, Russia, August 14, 2007
Tinder polypore mushrooms (bracket fungus, Fomes fomentarius) on a birch log in Dibuny, north-west from Saint Petersburg, Russia, October 23, 2016
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
Prostrate form of purple toothed polypore fungus (Trichaptum biforme) on a fallen birch in Sosnovka Park. Saint Petersburg, Russia, March 20, 2017
Birches on a small island on Beloe Lake in Gatchina Park. Gatchina, a suburb of Saint Petersburg, Russia, July 5, 2010
Birches near Slavyanka River in Pavlovsk Park, suburb of Saint Petersburg. Russia, May 15, 2011
Fungus (mushrooms) Phellinus laevigatus on a birch tree near Lisiy Nos, south from Saint Petersburg. Russia, February 18, 2017
Group of birch milkcap mushrooms (Lactarius tabidus) in Sosnovka Park. Saint Petersburg, Russia, September 16, 2017
Birch knight mushrooms (Tricholoma fulvum) on roadside in area of Lisiy Nos - Olgino west from Saint Petersburg. Russia, September 21, 2017
Birches of Poperechnaya Alley in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, September 17, 2013
Oyster mushrooms (Pleurotus ostreatus, Russian name Veshenka) on a birch in Sosnovka Park. Saint Petersburg, Russia, December 8, 2016
Birch trees and logs in Sosnovka Park. Saint Petersburg, Russia, May 30, 2009
Birches on shore of Gulf of Finland in Alexandria Park in Peterhof, west from Saint Petersburg. Russia, June 6, 2011
Birches of Krasnogo Bugra Alley in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, September 15, 2016
Birch alley in Sosnovka Park. Saint Petersburg, Russia, October 25, 2016
Pores of Red-Belt Conk mushroom ( Fomitopsis pinicola) from a birch in Sosnovka Park. Saint Petersburg, Russia, March 20, 2017
Birch forest with snow in Sosnovka Park. Saint Petersburg, Russia, April 22, 2017
Red velvety patches on a birch leaf caused by the eriophyid mite in Sosnovka Park. Saint Petersburg, Russia, June 29, 2017
Brown birch bolete mushroom (Leccinum scabrum) on a lawn in Gardens of Polytechnic Institute. Saint Petersburg, Russia, August 13, 2017
Birch milkcap mushrooms (Lactarius tabidus) near Dibuny, north-west from Saint Petersburg. Russia, August 20, 2017
Birch trees in Sosnovka Park. Saint Petersburg, Russia, September 3, 2018
Northern honey mushrooms (Armillaria borealis) covering a fallen birch near Lisiy Nos, west from Saint Petersburg. Russia, September 6, 2018
Birch growing on a stone fence at Storozhevoy Bashni Street in old city of Vyborg. Russia, May 24, 2019
Tilted birches at Kavgolovskoe Lake. Kavgolovo, a suburb of Saint Petersburg, Russia, September 1, 2013
Birch bridge near Farm Palace in Alexandria Park. Peterhof, a suburb of Saint Petersburg, Russia, September 27, 2016
Orange plasmodium of many-headed slime mold Physarum polycephalum on a birch log in Sosnovka Park. Saint Petersburg, Russia, September 16, 2017
Group of birch trees on Laskovy Beach in Solnechnoe, west from Saint Petersburg. Russia, September 5, 2013
Birches along a ditch in Sosnovka Park in northern Saint Petersburg. Russia, January 29, 2000
Back lit birch forest with blueberry bushes in Sosnovka Park. Saint Petersburg, Russia, May 30, 2009
A birch alley in Sosnovka Park near crossing of Svetlanovskiy and Tikhoretskiy Prospect. Saint Petersburg, Russia, September 3, 2002
Birches near Listvennaya Alley in northern Sosnovka Park. Saint Petersburg, Russia, September 23, 2013
Black cap birch bolete mushroom (Leccinum variicolor) in Sosnovka Park. Saint Petersburg, Russia, September 6, 2016
A birch grove near Prytkiy Creek between Orekhovo and Lembolovo, 30 miles north from Saint Petersburg. Russia, August 19, 2004
Birch trees of Karasiovoe Lake in northern area of Sosnovka Park. Saint Petersburg, Russia, September 24, 2015
White birch bolete mushroom (bog bolete, Leccinum holopus) in Orekhovo, north from Saint Petersburg. Russia, August 17, 2016
Birch trees on a meadow near Kanneliarvi, 40 miles north-west from Saint Petersburg, Russia, July 29, 2005
Birch circle (Krug Belyh Berioz) in far end of Pavlovsk Park, south from Saint Petersburg, Russia, June 23, 2010
Birch House in Gatchina Park, suburb of Saint Petersburg. Russia, May 16, 2011
Birch trees on Laskovy Beach in Solnechnoe, west from Saint Petersburg. Russia, September 5, 2013
Two birches in valley of Slavianka River in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, September 2, 2013
Narrow birch alley in Sosnovka Park. Saint Petersburg, Russia, May 17, 2011
Birch bolete mushroom Leccinum schistophilum(?) near Kavgolovskoe Lake near Oselki, 12 miles north from Saint Petersburg. Russia, September 20, 2013
Birch alley in far end of Pavlovsk Park, south from Saint Petersburg, Russia, June 23, 2010
Birch alley in Sosnovka Park in mist. Saint Petersburg, Russia, June 26, 2010
Birch grove near Krasnogo Bugra (Solntsa) Alley in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, September 17, 2013
Birch reflections in a pond near Sadovaya Street in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, May 18, 2015
Swamp species of birch bolete mushrooms (Leccinum schistophilum(?), Russian name Podberiozovik) near Kavgolovskoe Lake south from Oselki, 8 miles north from Saint Petersburg. Russia, September 23, 2015
Birches in swampy area in Sosnovka Park. Saint Petersburg, Russia, September 29, 2015
Birch trees in eastern part of Sosnovka Park. Saint Petersburg, Russia, September 29, 2015
Birch forest around a pond near Listvennaya Alley in Sosnovka Park. Saint Petersburg, Russia, September 29, 2015
Birch trees from Listvennaya Alley in Sosnovka Park. Saint Petersburg, Russia, September 29, 2015
Fall colors of birch forest from Listvennaya Alley in Sosnovka Park. Saint Petersburg, Russia, September 29, 2015
Orange birch bolete mushroom (Leccinum versipelle) in Orekhovo, north from Saint Petersburg. Russia, August 17, 2016
Birch at Kavgolovskoe Lake in fog. Kavgolovo, a suburb of Saint Petersburg, Russia, September 1, 2013
Birch trees along Krasnogo Bugra Alley in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, December 31, 2015
Cluster of elm oyster mushrooms (Hypsizygus ulmarius, Lyophyllum ulmarium) on a birch tree between Orekhovo and Lembolovo, north from Saint Petersburg. Russia, September 28, 2016
A river flowing in a canyon with birches and pines at Karelia Isthmus between Lembolovo and Orekhovo (a popular place for hiking and skiing), 30 miles north from Saint Petersburg. Russia, April 19, 1999.
Birch forest in northern area of Sosnovka Park in mist. Saint Petersburg, Russia, June 26, 2010
Birch polypore mushroom Piptoporus betulinus (bracket fungus Fomitopsis betulina, Russian name Trutovik) in Sosnovka Park. Saint Petersburg, Russia, August 25, 2016
Birch alley in Sosnovka Park. Saint Petersburg, Russia, October 20, 2016
Birch trees in Sosnovka Park. Saint Petersburg, Russia, October 20, 2016
Birch trees in Sosnovka Park. Saint Petersburg, Russia, December 1, 2016
Jelly rot fungus (Phlebia tremellosa, Merulius tremellosus) on a birch tree in Sosnovka Park. Saint Petersburg, Russia, March 13, 2017
Birch trees on Krasnogo Bugra Alley in Pavlovsk, suburb of Saint Petersburg. Russia, April 6, 2017
Polypore mushroom Hapalopilus rutilans (Hapalopilus nidulans) on a dry birch in northern part of Sosnovka Park. Saint Petersburg, Russia, April 26, 2017
Tinder conk mushrooms (Fomes fomentarius) on a birch log in Pesochny, north-west from Saint Petersburg. Russia, May 5, 2017
Crust tinder fungus Phellinus(?) on a birch tree in area of Dibuny - Pesochny, near Saint Petersburg. Russia, June 3, 2017
Birch milkcap mushrooms (Lactarius tabidus) in Sosnovka Park. Saint Petersburg, Russia, June 22, 2017
Red velvety patches on a birch leaf caused by the velvet erineum gall eriophyid mite in Sosnovka Park. Saint Petersburg, Russia, June 29, 2017
Birch milkcap mushrooms (Lactarius tabidus) in Sosnovka Park. Saint Petersburg, Russia, September 16, 2017
Lingzhi or reishi mushroom (Ganoderma lucidum) on a birch log near Lisiy Nos. West from Saint Petersburg, Russia, August 26, 2018
A narrow birch alley in Sosnovka Park. Saint Petersburg, Russia, April 10, 1999.
Birches west of Toksovo, 10 miles north of Saint Petersburg, Russia, April 26, 1999.
Masses of Sheathed Woodtuft mushrooms (Kuehneromyces mutabilis, Pholiota mutabilis) on birch log in Petiayarvi, 50 miles north from Saint Petersburg. Russia, August 31, 2013
Mature orange cap birch bolete mushrooms (Leccinum versipelle) on display on mushroom exhibition in Botanic Institute. Saint Petersburg, Russia, September 20, 2013
Birch trees in eastern part of Sosnovka Park. Saint Petersburg, Russia, September 29, 2015
Birches in a forest between Lembolovo and Orekhovo, 40 miles north from Saint Petersburg. Russia, September 7, 2007
Birch stand near Lamsky Pond in Aleksandrovsky (Alexander) Park. Pushkin (former Tsarskoe Selo) near Saint Petersburg, Russia, September 19, 2013
Birch milkcap mushrooms (Lactarius tabidus, Lactarius theiogalus) in swampy area in Sosnovka Park. Saint Petersburg, Russia, September 6, 2016
Snowy path in a birch forest in Sosnovka Park. Saint Petersburg, Russia, November 10, 2016
Birch and mountain ash trees in Sosnovka Park. Saint Petersburg, Russia, May 31, 2009
Birch Gates in Gatchina Park. Gatchina, a suburb of Saint Petersburg, Russia, June 20, 2009
Birches near shooting range in Sosnovka Park. Saint Petersburg, Russia, September 23, 2013
Birch webcap mushrooms (Cortinarius triumphans) near Kavgolovskoe Lake south from Oselki, 8 miles north from Saint Petersburg. Russia, September 23, 2015
Birches in valley of Slavianka River in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, September 2, 2013
Birch tree on Laskovy Beach in Solnechnoe, west from Saint Petersburg. Russia, September 5, 2013
Birches in fog at Krasnogo Bugra (Solntsa) Alley in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, September 17, 2013
Corner of Birch House in Gatchina Park. Gatchina, suburb of Saint Petersburg, Russia, May 17, 2015
A narrow birch alley over a marshy forest in Sosnovka Park. Saint Petersburg, Russia, April 11, 1999.
Birches and pines in snow in Sosnovka Park. Saint Petersburg, Russia, December 19, 2005
Birch alley in central part of Sosnovka Park. Saint Petersburg. Russia, September 9, 2007
Pair of birch bolete mushrooms (Boletus Scaber, Leccinum scabrum) in north-west area of Monrepo (Mon Repos) Park. Vyborg, Russia, September 14, 2013
Birch bolete mushrooms (Leccinum scabrum) in north-west area of Monrepo (Mon Repos) Park. Vyborg, Russia, September 14, 2013
Swamp and birch alley along Tioplaya River in a remote area Zverinets of Gatchina Park. Gatchina, a suburb of Saint Petersburg, Russia, July 5, 2010
Birch trees near Lamsky Pavilion in Aleksandrovsky (Alexander) Park. Pushkin (former Tsarskoe Selo) near Saint Petersburg, Russia, September 19, 2013
Kavgolovskoe Lake 10 miles north of Saint Petersburg. A cranberry marsh is behind pussy willow and birches. Pine forest is at the background. Russia, April 22, 1999.
Birch tree stand on Laskovy Beach in Solnechnoe, west from Saint Petersburg. Russia, September 5, 2013
Road in a birch forest in Sosnovka Park. Saint Petersburg, Russia, May 17, 2011
Birches on Krasnodolinnaya(?) Alley in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, September 2, 2013
Group of birches on Laskovy Beach in Solnechnoe, west from Saint Petersburg. Russia, September 5, 2013
Birch forest near Bublik Lake in Sosnovka Park. Saint Petersburg, Russia, September 23, 2013
Birch bolete mushroom (Leccinum schistophilum(?), Russian name Podberiozovik) near Kavgolovskoe Lake south from Oselki, 8 miles north from Saint Petersburg. Russia, September 23, 2015
Birch trees in Sosnovka Park. Saint Petersburg, Russia, September 28, 2015
Birches around Karasiovoe Lake near Listvennaya Alley in Sosnovka Park. Saint Petersburg, Russia, September 29, 2015
Orange birch bolete mushroom (Leccinum versipelle) in moss in Zakhodskoe, 50 miles north from Saint Petersburg. Russia, July 10, 2016
Purple toothed polypore mushrooms (Trichaptum biforme) on a birch log in Lisiy Nos, 5 miles west from Saint Petersburg. Russia, August 5, 2016
Pair of orange cap birch bolete mushrooms (Leccinum versipelle) in Orekhovo, north from Saint Petersburg. Russia, August 17, 2016
Birch bridge of Farm Palace in Alexandria Park in Peterhof, west from Saint Petersburg. Russia, August 26, 2016
Orange birch bolete mushroom (Leccinum versipelle) near Dibuny, west from Saint Petersburg. Russia, September 7, 2016
Malformed trunk of 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
Birch alley in Yuntolovsky Park during snowfall. Saint Petersburg, Russia, February 23, 2017
Northern honey mushrooms (Armillaria borealis) on a fallen birch near Lisiy Nos, west from Saint Petersburg. Russia, September 6, 2018
Birch knight mushrooms (Tricholoma fulvum) together with a webcap in a coastal forest between Lisiy Nos and Olgino, west from Saint Petersburg. Russia, September 6, 2018
Birch trees in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, June 14, 2011
Birch trees in eastern part of Sosnovka Park at morning. Saint Petersburg. Russia, September 9, 2007
Orange birch bolete mushrooms (Leccinum versipelle) near Lembolovo, 45 miles north from Saint Petersburg. Russia, August 27, 2013
Birches on Laskovy Beach in Solnechnoe, west from Saint Petersburg. Russia, September 5, 2013
A. V. Sergeev among birches in Sosnovka Park with evening fog. Saint Petersburg, Russia, April 15, 1999.
Birch Island near north-east shore of Beloe Lake in Gatchina Park. Gatchina, a suburb of Saint Petersburg, Russia, June 20, 2009
Ochre Bracket mushrooms (Trametes ochracea) on a stump of small birch in swampy area of Sosnovka Park. Saint Petersburg, Russia, April 8, 2017
Krug Belykh Berioz (Circle of White Birches) in Pavlovsk Park. Sankt Petersburg, Russia, October 11, 2000
White birch bolete mushroom (bog bolete, Leccinum holopus) in a swamp in Kanneliarvi, 40 miles north-west from Saint Petersburg. Russia, August 17, 2007
Birch bridge of Farm Palace in Alexandria Park in Peterhof, west from Saint Petersburg. Russia, June 6, 2011
Several birch trees on Laskovy Beach in Solnechnoe, west from Saint Petersburg. Russia, September 5, 2013
Birch grove near Lamsky Pond in Aleksandrovsky (Alexander) Park. Pushkin (former Tsarskoe Selo) near Saint Petersburg, Russia, September 19, 2013
Orange birch bolete mushrooms (Leccinum versipelle) on display on mushroom exhibition in Botanic Institute. Saint Petersburg, Russia, September 20, 2013
Dwarf Birch (Betula nana) with catkins in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 15, 2015
Brown birch bolete mushroom (Leccinum scabrum(?)) in Sosnovka Park. Saint Petersburg, Russia, July 20, 2016
Brown birch bolete mushrooms (Leccinum scabrum) in Dibuny, north-west from Saint Petersburg, Russia, August 9, 2016
Birch trees on Laskovy Beach of Gulf of Finland in Solnechoe, suburb of Saint Petersburg. Russia, February 15, 2017
Birch trees on Laskovy Beach in Solnechnoe, west from Saint Petersburg. Russia, March 24, 2017
Dog vomit slime mold (Fuligo septica) on a birch log in Sosnovka Park. Saint Petersburg, Russia, July 19, 2017
Brown birch bolete mushrooms (Leccinum scabrum) in Gardens of Polytechnic Institute. Saint Petersburg, Russia, July 29, 2017
Fall colors of birches in swampy area in Sosnovka Park. Saint Petersburg, Russia, September 29, 2015
Birch trees from Listvennaya Alley in Sosnovka Park. Saint Petersburg, Russia, September 29, 2015
Orange birch bolete mushroom (Leccinum versipelle) grown by roadside near Lembolovo, 30 miles north from Saint Petersburg. Russia, August 19, 2004
Brown birch bolete mushroom (Leccinum scabrum(?), Russian name Podberiozovik) in moss in a forest between Orekhovo and Lembolovo, north from Saint Petersburg. Russia, June 30, 2010
Orange birch bolete mushroom (Leccinum versipelle) near Lembolovo, 45 miles north from Saint Petersburg. Russia, August 27, 2013
Birches and a pond near Krasnogo Solntsa (Red Sun) Alley in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, May 18, 2015
Tiny orange birch bolete mushrooms (Leccinum versipelle, Podosinoviki) sold near Udelnaya Train Station. Saint Petersburg, Russia, August 12, 2012
Birch trees near Red Bugor Alley and Tyarlevskaya Cutting in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, September 26, 2015
Birch trees in fog near northern end of Beloe Lake in Gatchina, a suburb of Saint Petersburg. Russia, September 27, 2015
Orange birch bolete mushroom (Leccinum versipelle) in a forest in Posiolok, near Vyritsa, 50 miles south from Saint Petersburg. Russia, July 9, 2016
Birch alley in Sosnovka Park. Saint Petersburg, Russia, November 8, 2016
Birch forest in fresh snow in Sosnovka Park. Saint Petersburg, Russia, November 25, 2016
Willow bracket mushrooms (Phellinus igniarius) forming a ring around a cut branch on a birch near Lisiy Nos, west from Saint Petersburg. Russia, February 18, 2017
Birch Bolete mushroom (Boletus Scaber, Leccinum scabrum) in Petiayarvi, 50 miles north from Saint Petersburg. Russia, August 31, 2013
Black cap birch bolete mushroom (Leccinum variicolor) in swampy area of Sosnovka Park. Saint Petersburg, Russia, September 15, 2013
Birch trees of Krasnogo Bugra Alley in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, December 31, 2015
Road in birch forest in fresh snow in Sosnovka Park. Saint Petersburg, Russia, November 25, 2016
Typical birch groves of southern Ural near Korkino where it was supposed to pick mushrooms. South from Cheliabinsk, Russia, August 12, 2001
Pair of birch birch Bolete mushrooms (Boletus Scaber, Leccinum scabrum) in Petiayarvi, 50 miles north from Saint Petersburg. Russia, August 31, 2013
Birch logs in Petiayarvi, 50 miles north from Saint Petersburg. Russia, August 31, 2013
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
Golden scalycap mushrooms (Pholiota aurivella) on a birch tree near Kavgolovskoe Lake south from Oselki, 8 miles north from Saint Petersburg. Russia, September 23, 2015
Birch trees of Krasnodolinnaya Alley in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, September 26, 2015
Birch forest in fresh snow in Sosnovka Park. Saint Petersburg, Russia, November 25, 2016
Mossy maze polypore mushrooms (Cerrena unicolor) on a birch near Kamenka River in Yuntolovsky Park. Saint Petersburg, Russia, February 23, 2017
Birches of Krasnodolinnaya Alley in fog in Pavlovsk Park in Pavlovsk, a suburb of Saint Petersburg. Russia, September 17, 2013
Birch alley in Sosnovka Park. Sankt Petersburg, Russia, September 26, 2000
Roots of birches on an alley in Sosnovka Park. Sankt Petersburg, Russia, September 26, 2000
Birch milkcap mushrooms (Lactarius tabidus, Russian name Gorkushka) in Sosnovka Park in Saint Petersburg. Russia, June 24, 2010
Birches on Laskovy Beach in Solnechnoe, west from Saint Petersburg. Russia, September 5, 2013
Birch webcap mushrooms (Cortinarius triumphans) near Kavgolovskoe Lake near Oselki, 12 miles north from Saint Petersburg. Russia, September 20, 2013
Birch forest in swampy area in Sosnovka Park. Saint Petersburg, Russia, September 29, 2015
Rusty colors of birch forest from Listvennaya Alley in Sosnovka Park. Saint Petersburg, Russia, September 29, 2015
Snowy birches in Sosnovka Park. Saint Petersburg, Russia, November 25, 2016
Snowy birch trees in Sosnovka Park. Saint Petersburg, Russia, November 25, 2016
Old birch bark west from Dibuny - Pesochny area near Saint Petersburg. Russia, February 4, 2017
Iron wire grown inside a birch tree west from Dibuny - Pesochny area near Saint Petersburg. Russia, February 4, 2017
Green alga Trentepohlia umbrina with orange carotenoid pigments and moss on a birch tree west from Dibuny - Pesochny area near Saint Petersburg. Russia, February 4, 2017
