 Close-up of birch blackhead (Diatrypella favacea) on a dry hazelnut on Orekhovaya Gora Hill in Duderhof Heights, south from Saint Petersburg. Russia, May 9, 2021
 Pattern of birch blackhead (Diatrypella favacea) on a dry hazelnut on Orekhovaya Gora Hill in Duderhof Heights, south from Saint Petersburg. Russia, May 9, 2021
 Spring hazelcup fungus (Encoelia furfuracea) together with birch blackhead (Diatrypella favacea) on Orekhovaya Gora Hill in Duderhof Heights, south from Saint Petersburg. Russia, May 9, 2021
 Fungus Biscogniauxia repanda on a dry stem of hazelnut(?) in a hazelnut forest on a slope of Orekhovaya Gora Hill in Duderhof Heights, south from Saint Petersburg. Russia, May 9, 2021
 Top view of fungus Biscogniauxia repanda on a dry stem of hazelnut(?) in a hazelnut forest on a slope of Orekhovaya Gora Hill in Duderhof Heights, south from Saint Petersburg. Russia, May 9, 2021
 Close-up of fungus Biscogniauxia repanda on a dry stem of hazelnut(?) in a hazelnut forest on a slope of Orekhovaya Gora Hill in Duderhof Heights, south from Saint Petersburg. Russia, May 9, 2021
 Side view of fungus Biscogniauxia repanda on a dry stem of hazelnut(?) in a hazelnut forest on a slope of Orekhovaya Gora Hill in Duderhof Heights, south from Saint Petersburg. Russia, May 9, 2021
 Black formations of fungus Biscogniauxia repanda on a dry stem of hazelnut(?) in a hazelnut forest on a slope of Orekhovaya Gora Hill in Duderhof Heights, south from Saint Petersburg. Russia, May 9, 2021
 Fungus Biscogniauxia repanda on wood of hazelnut(?) on Orekhovaya Gora Hill in Duderhof Heights, south from Saint Petersburg. Russia, May 9, 2021
 Fungus Biscogniauxia repanda on a dry stem of hazelnut(?) on Orekhovaya Gora Hill in Duderhof Heights, south from Saint Petersburg. Russia, May 9, 2021
 Details of fungus Biscogniauxia repanda on a dry stem of hazelnut(?) on Orekhovaya Gora Hill in Duderhof Heights, south from Saint Petersburg. Russia, May 9, 2021
 Corticioid fungus Peniophora incarnata on a hazelnut stem of Orekhovaya Gora Hill in Duderhof Heights, south from Saint Petersburg. Russia, May 9, 2021
 Ascomycete fungus Encoelia furfuracea on a dry broken hazelnut on Orekhovaya Gora Hill in Duderhof Heights, south from Saint Petersburg. Russia, May 9, 2021
 Upper surface of fungus Biscogniauxia repanda on a dry stem of hazelnut(?) on Orekhovaya Gora Hill in Duderhof Heights, south from Saint Petersburg. Russia, May 9, 2021
 Jelly fungus Exidia nigricans on wood in a hazelnut forest on a slope of Orekhovaya Gora Hill in Duderhof Heights, south from Saint Petersburg. Russia, May 9, 2021
 Hazel woodwart fungus (Hypoxylon fuscum) on a hazelnut stem on a slope of Orekhovaya Gora Hill in Duderhof Heights, south from Saint Petersburg. Russia, May 9, 2021
 Some bracket polypore mushroom on rotting wood in a hazelnut forest on a slope of Orekhovaya Gora Hill in Duderhof Heights, south from Saint Petersburg. Russia, May 9, 2021
 Pore surface of a bracket polypore mushroom in a hazelnut forest on a slope of Orekhovaya Gora Hill in Duderhof Heights, south from Saint Petersburg. Russia, May 9, 2021
 Bracket polypore mushroom on a fallen tree in a hazelnut forest on a slope of Orekhovaya Gora Hill in Duderhof Heights, south from Saint Petersburg. Russia, May 9, 2021
 Blue flower of Hepatica (Pechonochnitsa in Russian) in a hazelnut forest on a slope of Orekhovaya Gora Hill in Duderhof Heights, south from Saint Petersburg. Russia, May 9, 2021
 Lungwort (Pulmonaria obscura, Russian name Medunitsa) in a hazelnut forest on a slope of Orekhovaya Gora Hill in Duderhof Heights, south from Saint Petersburg. Russia, May 9, 2021
 Corticioid fungus Hypoxylon vogesiacum on dry wood in a hazelnut forest on a slope of Orekhovaya Gora Hill in Duderhof Heights, south from Saint Petersburg. Russia, May 9, 2021
 Texture of hazel woodwart fungus (Hypoxylon fuscum) on a hazelnut stem on a slope of Orekhovaya Gora Hill in Duderhof Heights, south from Saint Petersburg. Russia, May 9, 2021
 Young hazel woodwart fungus (Hypoxylon fuscum) on a hazelnut stem on a slope of Orekhovaya Gora Hill in Duderhof Heights, south from Saint Petersburg. Russia, May 9, 2021
 Spring hazelcup fungus (Encoelia furfuracea) on a dry broken hazelnut bush on a slope of Orekhovaya Gora Hill in Duderhof Heights, south from Saint Petersburg. Russia, May 9, 2021
 Close-up of hazel woodwart fungus (Hypoxylon fuscum) on a hazelnut stem on a slope of Orekhovaya Gora Hill in Duderhof Heights, south from Saint Petersburg. Russia, May 9, 2021
 Spring hazelcup fungus (Encoelia furfuracea) on a broken hazelnut bush on a slope of Orekhovaya Gora Hill in Duderhof Heights, south from Saint Petersburg. Russia, May 9, 2021
 Close-up of spring hazelcup fungus (Encoelia furfuracea) in a hazelnut forest on a slope of Orekhovaya Gora Hill in Duderhof Heights, south from Saint Petersburg. Russia, May 9, 2021
 Cluster of spring hazelcup fungus (Encoelia furfuracea) on a dry broken hazelnut bush on a slope of Orekhovaya Gora Hill in Duderhof Heights, south from Saint Petersburg. Russia, May 9, 2021
 Dried cups of spring hazelcup fungus (Encoelia furfuracea) in a hazelnut forest on a slope of Orekhovaya Gora Hill in Duderhof Heights, south from Saint Petersburg. Russia, May 9, 2021
 Blue flowers of Hepatica (Pechonochnitsa in Russian) on Orekhovaya Gora Hill in Duderhof Heights, south from Saint Petersburg. Russia, May 9, 2021
 Scarlet elfcup mushrooms (Sarcoscypha austriaca) at the foot of Orekhovaya Gora Hill in Duderhof Heights, south from Saint Petersburg. Russia, May 9, 2021
 Yellow brain fungus (Tremella mesenterica) on a dry tree on Orekhovaya Gora Hill in Duderhof Heights, south from Saint Petersburg. Russia, May 9, 2021
 Close-up of a blue flower of Hepatica (Pechonochnitsa in Russian) on Orekhovaya Gora Hill in Duderhof Heights, south from Saint Petersburg. Russia, May 9, 2021
 Small troop mushrooms Xeromphalina kauffmanii on an old mossy stump of a large tree on a slope without forest on Orekhovaya Gora Hill in Duderhof Heights, south from Saint Petersburg. Russia, May 9, 2021
 Cross-veined troop mushrooms Xeromphalina kauffmanii on an old mossy stump of a large tree on a slope without forest on Orekhovaya Gora Hill in Duderhof Heights, south from Saint Petersburg. Russia, May 9, 2021
 Cross-veined troop mushrooms Xeromphalina kauffmanii in moss on an old rotted stump of a large tree on a slope without forest on Orekhovaya Gora Hill in Duderhof Heights, south from Saint Petersburg. Russia, May 9, 2021
 Duderhof Train Station, south from Saint Petersburg. Russia, May 9, 2021
 Velvet twiglet mushrooms (Simocybe sumptuosa) growing from cracks of bark on a birch log near Lisiy Nos. West from Saint Petersburg, Russia, August 26, 2018
 Hazelnut forest on a slope of a hill in Orekhovo, 40 miles north from Saint Petersburg. Russia, March 18, 2017
 Pink jelly fungus (Craterocolla cerasi) growing through bark of a fallen aspen on old railroad path west from Kuzmolovo, near Saint Petersburg. Russia, May 7, 2021
 Underside of pink jelly fungus (Craterocolla cerasi) growing through bark of a fallen aspen on old railroad path west from Kuzmolovo, near Saint Petersburg. Russia, May 7, 2021
 Back lit leaves of hazelnut in Sablino, south from Saint Petersburg. Russia, May 21, 2011
 Jelly fungus Exidia nigricans on bark of a fallen birch in Tarkhovka Park, west from Saint Petersburg. Russia, May 10, 2021
 Corticioid form of mushroom Trichaptum fuscoviolaceum growing on bark of pine in Sosnovka Park. Saint Petersburg, Russia, April 4, 2017
 False chanterelle mushrooms (Hygrophoropsis aurantiaca) growing on a ant hill between Orekhovo and Lembolovo, north from Saint Petersburg. Russia, September 28, 2016
 Shaggy parasol mushroom (Chlorophyllum olivieri) cultivated by ants growing on ant hill in Okhtinsky Park in Toksovo, 8 miles north from Saint Petersburg. Russia, September 13, 2013
 Old birch bark west from Dibuny - Pesochny area near Saint Petersburg. Russia, February 4, 2017
 Peeling birch bark west from Dibuny - Pesochny area near Saint Petersburg. Russia, February 4, 2017
 Rough bark of a birch west from Dibuny - Pesochny area near Saint Petersburg. Russia, February 4, 2017
 Golden lichen Xanthoria parietina(?) on a birch growing near Gulf of Finland near Morskaya, west from Saint Petersburg. Russia, March 16, 2017
 Northern honey mushrooms (Armillaria borealis) growing on a fallen birch near Lisiy Nos, west from Saint Petersburg. Russia, September 6, 2018
 Cracked bark of an old oak tree near Lisiy Nos, south from Saint Petersburg. Russia, February 18, 2017
 Burrows of bark beetle larvae(?) near Lisiy Nos, south from Saint Petersburg. Russia, August 17, 2018
 Brown birch bolete mushroom (Leccinum scabrum) growing in moss in Okhtinsky Park near Toksovo, suburb of Saint Petersburg. Russia, August 29, 2013
 Fungus (mushroom) Cylindrobasidium evolvens growing on fallen birch leaves taken from peat area in Sosnovka Park. Saint Petersburg, Russia, March 23, 2017
 Soft porous fungus covering rotten birch bark in Sosnovka Park. Saint Petersburg, Russia, September 2, 2017
 Catkins of hazelnut taken from Sosnovka Park. Saint Petersburg, Russia, March 22, 2017
 Blooming hazelnut from Sosnovka Park. Saint Petersburg, Russia, March 22, 2017
 Fungus (mushroom) Cylindrobasidium evolvens growing on fallen birch leaves on peat in swampy area of Sosnovka Park. Saint Petersburg, Russia, March 23, 2017
 Bernal Heights summit from Billy Goat Hill in San Francisco. California, March 14, 2024
 Rusty mushrooms growing on a tree stump near Kavgolovskoe Lake south from Oselki, 8 miles north from Saint Petersburg. Russia, September 23, 2015
 Potrero Hill from a back porch at Diamond Heights Boulevard. San Francisco, California, March 13, 2024
 30th Street and Bernal Heights from Billy Goat Hill in San Francisco. California, March 14, 2024
 Bernal Heights summit after sunset from Billy Goat Hill in San Francisco. California, March 14, 2024
 Bernal Heights summit in dusk from Billy Goat Hill in San Francisco. California, March 14, 2024
 Leaves of hazelnut(?) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 28, 2011
 Robust bracket mushrooms (Fomitiporia robusta, Phellinus robustus) growing from a place of a cut branch of an oak near Lisiy Nos, south from Saint Petersburg. Russia, February 18, 2017
 Bulgaria inquinans mushrooms on a birch bark on mushroom show in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, September 30, 2017
 Blooming hazelnut in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, April 21, 2017
 Birch bark on Krasnodolinnaya Alley in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, December 31, 2015
 Wrinkled crust fungus (Phlebia radiata mushroom) emerging behind bark near Lisiy Nos, south from Saint Petersburg. Russia, February 18, 2017
 Mission District and Potrero Hill from a back porch at Diamond Heights Boulevard. San Francisco, California, March 13, 2024
 Rough birch bark on Krasnodolinnaya Alley in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, December 31, 2015
 Zolotaya Gora (Golden Mount) Cascade of fountains in Peterhof, a former Tsar residence, now a suburb of Saint Petersburg. Russia, September 20, 2002
 Zolotaya Gora (Golden Mount) Cascade of fountains in Peterhof, a former Tsar residence, now a suburb of Saint Petersburg. Russia, September 20, 2002
 Tiny mushrooms Phleogena faginea growing from cracks of bark on a large elm(?) stump in Big Creek Scenic Area of Sam Houston National Forest. Shepherd, Texas, July 10, 2021
 Yeast mold Dipodascus armillariae(?) or Geotrichum sp. growing on gills of honey mushrooms Armillaria borealis(?) on a tree near Lisiy Nos, south from Saint Petersburg. Russia, September 3, 2016
 Bitter bolete mushrooms (Tylopilus felleus) growing from a tree base near Kavgolovskoe Lake south from Oselki, 8 miles north from Saint Petersburg. Russia, August 25, 2013
 Flame scalecap mushrooms (Pholiota flammans) growing on a tree stump near Kavgolovskoe Lake south from Oselki, 8 miles north from Saint Petersburg. Russia, August 25, 2013
 Bark of a birch tree covered by green algae in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, July 31, 2024
 Tiny globular mushrooms Lasiosphaeria ovina on bark of a fallen bird cherry(?) near Lisiy Nos, south from Saint Petersburg. Russia, August 17, 2018
 Tiny cups of Ascomycete fungus growing on a rotting stem of nettle taken from Sosnovka Park. Saint Petersburg, Russia, May 21, 2021
 Brown corticioid (crust) fungus Dichostereum effuscatum growing on bark and wood of a fallen oak at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, January 1, 2023
 Close-up of mushrooms Phleogena faginea on a large stump 0.7 m above ground, growing from cracks of bark in Big Creek Scenic Area of Sam Houston National Forest. Shepherd, Texas, July 10, 2021
 Bernal Heights from a back porch at Diamond Heights Boulevard. San Francisco, California, March 13, 2024
 Bernal Heights and Bay from a back porch at Diamond Heights Boulevard. San Francisco, California, March 13, 2024
 Corticioid fungus Hyphoderma setigerum on hazelnut in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, March 17, 2017
 Flowers of beaked hazelnut (Corylus cornuta) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, April 21, 2017
 Evernia(?) lichen on pine bark in Zakhodskoe (Lounatjoki), 50 miles north from Saint Petersburg. Russia, May 22, 2021
 Resupinate polypore mushroom Antrodia on a log without bark near Dibuny, north-west from Saint Petersburg, Russia, May 5, 2021
 A tomb near a quarry between Malinovaya Hill and Artillery storage west from Toksovo, near Saint Petersburg. Russia, May 2, 2021
 Growing actinidia (?) in an extinct volcano of Mount Bental near a border with Syria, with a top secret Israeli reconnaissance station on background. Golan Heights, the Middle East, April 7, 2001
 Area of Dolores Heights from a back porch at Diamond Heights Boulevard. San Francisco, California, March 13, 2024
 Bernal Heights at evening from a back porch at Diamond Heights Boulevard. San Francisco, California, March 13, 2024
 Bernal Heights after sunset from a back porch at Diamond Heights Boulevard. San Francisco, California, March 13, 2024
 Dolores Heights and Mission from a back porch at Diamond Heights Boulevard. San Francisco, California, March 13, 2024
 Bernal Heights at dusk from a back porch at Diamond Heights Boulevard. San Francisco, California, March 13, 2024
 Area of Dolores Heights and Mission from a back porch at Diamond Heights Boulevard. San Francisco, California, March 13, 2024
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