 Tooth mushrooms Sarcodon glaucopus(?) on an old sand dune overgrown by pine forest in Sestroretskoye Swamp near Saint Petersburg. Russia, August 11, 2024
 Woolly tooth mushrooms (Phellodon tomentosus) on an old sand dune overgrown by pine forest in Sestroretskoye Swamp near Saint Petersburg. Russia, August 11, 2024
 Blue tooth mushrooms (Hydnellum caeruleum) on an old sand dune overgrown by pine forest in Sestroretskoye Swamp near Saint Petersburg. Russia, August 11, 2024
 Woolly tooth mushrooms (Phellodon tomentosus) in moss on an old sand dune overgrown by pine forest in Sestroretskoye Swamp near Saint Petersburg. Russia, August 11, 2024
 Young woolly tooth mushrooms (Phellodon tomentosus) on an old sand dune overgrown by pine forest in Sestroretskoye Swamp near Saint Petersburg. Russia, August 11, 2024
 Caps of blue tooth mushrooms (Hydnellum caeruleum) on an old sand dune overgrown by pine forest in Sestroretskoye Swamp near Saint Petersburg. Russia, August 11, 2024
 Pattern of caps of woolly tooth mushrooms (Phellodon tomentosus) on an old sand dune overgrown by pine forest in Sestroretskoye Swamp near Saint Petersburg. Russia, August 11, 2024
 Cross section of blue tooth mushrooms (Hydnellum caeruleum) on an old sand dune overgrown by pine forest in Sestroretskoye Swamp near Saint Petersburg. Russia, August 11, 2024
 Toughshank mushroom (Gymnopus ocior) on an old sand dune overgrown by pine forest in Sestroretskoye Swamp near Saint Petersburg. Russia, August 11, 2024
 Grey falsebolete mushroom (Boletopsis grisea) on an old sand dune overgrown by pine forest in Sestroretskoye Swamp near Saint Petersburg. Russia, August 11, 2024
 Mealy tooth mushroom (Hydnellum ferrugineum) on an old sand dune overgrown by pine forest in Sestroretskoye Swamp near Saint Petersburg. Russia, August 11, 2024
 King bolete mushroom (Boletus edulis) on an old sand dune overgrown by pine forest in Sestroretskoye Swamp near Saint Petersburg. Russia, August 11, 2024
 Foxy bolete mushroom (Leccinum vulpinum) on an old sand dune overgrown by pine forest in Sestroretskoye Swamp near Saint Petersburg. Russia, August 11, 2024
 Side view of toughshank mushroom (Gymnopus ocior) on an old sand dune overgrown by pine forest in Sestroretskoye Swamp near Saint Petersburg. Russia, August 11, 2024
 Underside of a mealy tooth mushroom (Hydnellum ferrugineum) on an old sand dune overgrown by pine forest in Sestroretskoye Swamp near Saint Petersburg. Russia, August 11, 2024
 Guttation of a mealy tooth mushroom (Hydnellum ferrugineum) on an old sand dune overgrown by pine forest in Sestroretskoye Swamp near Saint Petersburg. Russia, August 11, 2024
 Cross section of grey falsebolete mushroom (Boletopsis grisea) on an old sand dune overgrown by pine forest in Sestroretskoye Swamp near Saint Petersburg. Russia, August 11, 2024
 Swamp brittlegill mushrooms (Russula paludosa) at Eco Trail Sestroretskoye Swamp near Saint Petersburg. Russia, August 11, 2024
 Brown webcap (Cortinarius) mushroom at Eco Trail Sestroretskoye Swamp near Saint Petersburg. Russia, August 11, 2024
 Underside of a brown webcap (Cortinarius) mushroom at Eco Trail Sestroretskoye Swamp near Saint Petersburg. Russia, August 11, 2024
 Young light brown webcap (Cortinarius) mushrooms in a swamp in a forest east from a train stop Platform 46 km near Semrino, south from Saint Petersburg. Russia, August 10, 2024
 Young light brown webcap (Cortinarius) mushrooms with cross section in a swamp in a forest east from a train stop Platform 46 km near Semrino, south from Saint Petersburg. Russia, August 10, 2024
 A pond in a forest at Eco Trail Sestroretskoye Swamp near Saint Petersburg. Russia, August 11, 2024
 Old quarry in a forest at Eco Trail Sestroretskoye Swamp near Saint Petersburg. Russia, August 11, 2024
 Tooth mushrooms Sarcodon glaucopus at Eco Trail Sestroretskoye Swamp near Saint Petersburg. Russia, August 11, 2024
 Pale brown, almost white fragile brittlegill (Russula) mushrooms in Tarkhovka Park, west from Saint Petersburg. Russia, August 2, 2024
 Gassy webcap mushrooms (Cortinarius traganus) at Eco Trail Sestroretskoye Swamp near Saint Petersburg. Russia, August 11, 2024
 Bog bell mushrooms (Galerina paludosa) and cranberry in sphagnum moss at Eco Trail Sestroretskoye Swamp near Saint Petersburg. Russia, August 11, 2024
 Yellow brittlegill mushrooms (Russula claroflava(?)) partially lit by ultraviolet light in Sosnovka Park. Saint Petersburg, Russia, July 30, 2024
 Wooden boardwalk at Eco Trail Sestroretskoye Swamp near Saint Petersburg. Russia, August 11, 2024
 Brown brittlegill mushrooms (Russula) in a forest near Okhta River in Toksovo, north from Saint Petersburg. Russia, August 1, 2017
 Ripening cranberry in moss at Eco Trail Sestroretskoye Swamp near Saint Petersburg. Russia, August 11, 2024
 Orange sphagnum moss at Eco Trail Sestroretskoye Swamp near Saint Petersburg. Russia, August 11, 2024
 Close-up of sphagnum moss at Eco Trail Sestroretskoye Swamp near Saint Petersburg. Russia, August 11, 2024
 Buildings in Sestroretsk visible from Eco Trail Sestroretskoye Swamp near Saint Petersburg. Russia, August 11, 2024
 Cranberry (Russian name Kliukva) at Eco Trail Sestroretskoye Swamp near Saint Petersburg. Russia, August 11, 2024
 Cowberry (lingonberry, Russian name Brusnika) at Eco Trail Sestroretskoye Swamp near Saint Petersburg. Russia, August 11, 2024
 Underside of bog bell mushroom (Galerina paludosa) at Eco Trail Sestroretskoye Swamp near Saint Petersburg. Russia, August 11, 2024
 Cowberry (lingonberry, Vaccinium vitis-idaea) at Eco Trail Sestroretskoye Swamp near Saint Petersburg. Russia, August 11, 2024
 Underside of a tooth mushroom Sarcodon glaucopus at Eco Trail Sestroretskoye Swamp near Saint Petersburg. Russia, August 11, 2024
 Top view of a tooth mushroom Sarcodon glaucopus at Eco Trail Sestroretskoye Swamp near Saint Petersburg. Russia, August 11, 2024
 Fruits of cranberry (Russian name Kliukva) on sphagnum moss at Eco Trail Sestroretskoye Swamp near Saint Petersburg. Russia, August 11, 2024
 Underside of surprise webcap mushroom (Cortinarius semisanguineus) at Eco Trail Sestroretskoye Swamp near Saint Petersburg. Russia, August 11, 2024
 Close-up of a mealy tooth mushroom (Hydnellum ferrugineum) at Eco Trail Sestroretskoye Swamp near Saint Petersburg. Russia, August 11, 2024
 Bog bell mushroom (Galerina paludosa) in sphagnum moss at Eco Trail Sestroretskoye Swamp near Saint Petersburg. Russia, August 11, 2024
 Young gassy webcap mushroom (Cortinarius traganus) at Eco Trail Sestroretskoye Swamp near Saint Petersburg. Russia, August 11, 2024
 Red brittlegill (Russula) mushrooms in a dense forest near a summer house at 9a 2nd Borovaya Street in Solnechnoe, west from Saint Petersburg. Russia, August 7, 2024
 Side view of a surprise webcap mushroom (Cortinarius semisanguineus) at Eco Trail Sestroretskoye Swamp near Saint Petersburg. Russia, August 11, 2024
 Surprise webcap mushroom (Cortinarius semisanguineus) in sphagnum moss at Eco Trail Sestroretskoye Swamp near Saint Petersburg. Russia, August 11, 2024
 Cross section of gassy webcap mushroom (Cortinarius traganus) at Eco Trail Sestroretskoye Swamp near Saint Petersburg. Russia, August 11, 2024
 Brown brittlegill mushrooms (Russula) west from Kannelyarvi, 40 miles north from Saint Petersburg. Russia, August 7, 2012
 Pink brittlegill (Russula) mushrooms in Petiayarvi, north from Saint Petersburg. Russia, August 3, 2024
 Brittlegill (Russula) mushrooms with dark brown center in Gardens of Polytechnic Institute. Saint Petersburg, Russia, August 13, 2017
 Winecork brittlegill mushrooms (Russula adusta) in Kuzmolovo, north from Saint Petersburg. Russia, August 9, 2024
 Winecork brittlegill mushrooms (Russula adusta) near Orekhovo, north from Saint Petersburg. Russia, August 1, 2024
 Pink brittlegill (Russula) mushrooms in Tarkhovka Park, west from Saint Petersburg. Russia, August 2, 2024
 Transition area between swamp and a forest at Eco Trail Sestroretskoye Swamp near Saint Petersburg. Russia, May 27, 2021
 Brown-red brittlegill mushroom (Russula, Russian name Syroezhka) growing in sand near Orekhovo, north from Saint Petersburg. Russia, July 27, 2016
 Pink brittlegill (Russula) mushrooms with darkening gills in Kuzmolovo, north from Saint Petersburg. Russia, August 9, 2024
 Underside of pink brittlegill (Russula) mushrooms in Tarkhovka Park, west from Saint Petersburg. Russia, August 2, 2024
 Red brittlegill (Russula) mushrooms under spruce trees in Tarkhovka Park, west from Saint Petersburg. Russia, August 2, 2024
 Grey brittlegill (Russula) mushrooms in Dubki (The Oaks) Park in Sestroretsk, near Saint Petersburg. Russia, August 7, 2024
 False (deer) truffle Elaphomyces granulatus found in sandy soil in a pine forest at Eco Trail Sestroretskoye Swamp near Saint Petersburg. Russia, May 27, 2021
 False (deer) truffle Elaphomyces granulatus on exposed sandy soil on roadside in a pine forest at Eco Trail Sestroretskoye Swamp near Saint Petersburg. Russia, May 27, 2021
 Green brittlegill mushrooms (Russula aeruginea) on a trail across the swamp in Yuntolovsky Park. Saint Petersburg, Russia, July 7, 2017
 Group of green brittlegill mushrooms (Russula aeruginea) on a trail across the swamp in Yuntolovsky Park. Saint Petersburg, Russia, July 7, 2017
 Cross section of false (deer) truffle Elaphomyces granulatus on exposed sandy soil on roadside in a pine forest at Eco Trail Sestroretskoye Swamp near Saint Petersburg. Russia, May 27, 2021
 Brown brittlegill mushroom (Russula consobrina) in Okhtinsky Park near Toksovo, suburb of Saint Petersburg. Russia, August 29, 2013
 Wooden boardwalk in a swamp at Eco Trail Sestroretskoye Swamp near Saint Petersburg. Russia, May 27, 2021
 Blackening brittlegill mushrooms (Russula) (spore print yellowish light brown) in Hensel Park. College Station, Texas, May 8, 2023
 Bog Rosemary (Andromeda) in a sphagnum swamp at Eco Trail Sestroretskoye Swamp near Saint Petersburg. Russia, May 27, 2021
 Brittlegill (Russula sp.) mushrooms in pine forest near roadside stop at a partisan monument. North from Luga, Leningrad Region, Russia, August 24, 2013
 Top view of a brown brittlegill (Russula) mushroom when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight in Sosnovka Park. Saint Petersburg, Russia, July 30, 2024
 Brown brittlegill mushrooms (Russula) in Toksovo, suburb of Saint Petersburg. Russia, July 19, 2016
 Top view of a blackening brittlegill mushroom (Russula nigricans) near Orekhovo, north from Saint Petersburg. Russia, August 1, 2024
 Underside of a blackening brittlegill mushroom (Russula nigricans) near Orekhovo, north from Saint Petersburg. Russia, August 1, 2024
 Dark red brittlegill mushrooms (Russula) in a forest near Okhta River in Toksovo, north from Saint Petersburg. Russia, August 1, 2017
 Violet brittlegill mushrooms (Russula) in a forest near Okhta River in Toksovo, north from Saint Petersburg. Russia, August 1, 2017
 Cottongrass (Eriophorum, Pushitsa in Russian) in a swamp, with houses in Sestroretsk in background at Eco Trail Sestroretskoye Swamp near Saint Petersburg. Russia, May 27, 2021
 Winecork brittlegill mushrooms (Russula adusta) in a forest near Okhta River in Toksovo, north from Saint Petersburg. Russia, August 1, 2017
 Cross section of a blackening brittlegill mushroom (Russula nigricans) near Orekhovo, north from Saint Petersburg. Russia, August 1, 2024
 Underside of a grey brittlegill (Russula) mushroom in Dubki (The Oaks) Park in Sestroretsk, near Saint Petersburg. Russia, August 7, 2024
 Top view of a grey brittlegill (Russula) mushroom in Dubki (The Oaks) Park in Sestroretsk, near Saint Petersburg. Russia, August 7, 2024
 Pale brown brittlegill mushrooms (Russula) in Gardens of Polytechnic Institute. Saint Petersburg, Russia, July 29, 2017
 Old quarry in a forest at Eco Trail Sestroretskoye Swamp near Saint Petersburg. Russia, May 27, 2021
 Violet brittlegill mushrooms (Russula, Russian name Syroezhka) growing in sand near Orekhovo, north from Saint Petersburg. Russia, July 27, 2016
 Blackened mature menthol brittlegill mushroom (Russula albonigra) in Tarkhovka Park, west from Saint Petersburg. Russia, August 2, 2024
 Cap of a brittlegill (Russula) mushroom both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Richards Loop Trail in Sam Houston National Forest near Montgomery. Texas, September 6, 2024
 Winecork brittlegill mushrooms (Russula adusta) near Lisiy Nos, west from Saint Petersburg. Russia, July 19, 2024
 Yellow brittlegill mushrooms (Russula claroflava(?)) in Sosnovka Park. Saint Petersburg, Russia, July 30, 2024
 Underside of a brittlegill (Russula) mushroom both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Richards Loop Trail in Sam Houston National Forest near Montgomery. Texas, September 6, 2024
 Section of a brittlegill (Russula) mushroom both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Richards Loop Trail in Sam Houston National Forest near Montgomery. Texas, September 6, 2024
 Bog Rosemary (Andromeda polifolia, Andromeda glaucophylla, Russian name Podbel) in a swamp at Eco Trail Sestroretskoye Swamp near Saint Petersburg. Russia, May 27, 2021
 Brittlegill mushrooms Russula pectinata(?) on a lawn in Gardens of Polytechnic Institute. Saint Petersburg, Russia, July 23, 2024
 Young stinking brittlegill mushrooms (Russula foetens) near Lisiy Nos, west from Saint Petersburg. Russia, July 19, 2024
 Yellow brittlegill mushrooms (Russula) on a lawn in Gardens of Polytechnic Institute. Saint Petersburg, Russia, July 23, 2024
 Underside of winecork brittlegill mushrooms (Russula adusta) near Lisiy Nos, west from Saint Petersburg. Russia, July 19, 2024
 Mature and a young pink brittlegill (Russula) mushrooms in Sosnovka Park. Saint Petersburg, Russia, July 30, 2024
 Orange brittlegill (Russula) mushrooms near Lisiy Nos. West from Saint Petersburg, Russia, August 26, 2018
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