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Fungi: Basidiomycota: Agaricomycetes: Agaricales: Cortinariaceae: Cortinarius triumphans Fr., 1838

Cortinarius triumphans – Birch webcap

Synonym: Cortinarius crocolitus.

Common name: birch webcap.

Russian names: Pautinnik zhioltyy, Pautinnik triumfalnyy, Pribolotnik zhioltyy, Pribolotnik triumfalnyy.

Extract from Wikipedia article: Cortinarius triumphans, also known as the birch webcap, or yellow girdled webcap is a basidiomycete mushroom of the genus Cortinarius found in Europe. It is regarded as edible by some authorities, although others call it suspect and it resembles inedible species.

AI-generated description

Cortinarius triumphans is a species of fungus that belongs to the family Cortinariaceae. It has a cap that ranges from 2-6 cm in diameter, initially convex then becoming flat, with a reddish-brown to orange-brown color. The gills are adnate to emarginate, moderately spaced, and rust-colored. The stipe is 3-7 cm long, 0.5-1.5 cm thick, and has a club-shaped or bulbous base. In St. Petersburg, Leningrad Oblast, and north-western Russia, Cortinarius triumphans typically grows in coniferous forests, especially with spruce and pine, from late summer to early autumn. It is considered a rare species in the region, but can be found in areas with rich soil and adequate moisture.

Photos of this mushroom from the area of St. Petersburg, Russia

Birch webcap mushrooms (yellow girdled webcap, <B>Cortinarius triumphans</B>) in a forest around Kavgolovskoe Lake, near Saint Petersburg. Russia, <A HREF="../date-en/2013-09-06.htm">September 6, 2013</A>
LinkBirch webcap mushrooms (yellow girdled webcap, Cortinarius triumphans) in a forest around Kavgolovskoe Lake, near Saint Petersburg. Russia, September 6, 2013
Location on mapsDachnaya, 17, Toksovo, Leningrad Oblast, Russia
Young birch webcap mushrooms (yellow girdled webcap, <B>Cortinarius triumphans</B>) in a forest around Kavgolovskoe Lake, near Saint Petersburg. Russia, <A HREF="../date-en/2013-09-06.htm">September 6, 2013</A>
LinkYoung birch webcap mushrooms (yellow girdled webcap, Cortinarius triumphans) in a forest around Kavgolovskoe Lake, near Saint Petersburg. Russia, September 6, 2013
Location on mapsНовый переулок, 5, Leningrad Oblast, Russia
Birch webcap mushrooms (<B>Cortinarius triumphans</B>) near Kavgolovskoe Lake near Oselki, 12 miles north from Saint Petersburg. Russia, <A HREF="../date-en/2013-09-20.htm">September 20, 2013</A>
LinkBirch webcap mushrooms (Cortinarius triumphans) near Kavgolovskoe Lake near Oselki, 12 miles north from Saint Petersburg. Russia, September 20, 2013
Location on mapsКосогорная аллея, 9, Leningradskaya oblast', Russia, 188664
Caps of birch webcap mushrooms (<B>Cortinarius triumphans</B>) near Kavgolovskoe Lake near Oselki, 12 miles north from Saint Petersburg. Russia, <A HREF="../date-en/2013-09-20.htm">September 20, 2013</A>
LinkCaps of birch webcap mushrooms (Cortinarius triumphans) near Kavgolovskoe Lake near Oselki, 12 miles north from Saint Petersburg. Russia, September 20, 2013
Location on mapsDachnaya, 17, Toksovo, Leningrad Oblast, Russia
Three birch webcap mushrooms (<B>Cortinarius triumphans</B>) near Kavgolovskoe Lake near Oselki, 12 miles north from Saint Petersburg. Russia, <A HREF="../date-en/2013-09-20.htm">September 20, 2013</A>
LinkThree birch webcap mushrooms (Cortinarius triumphans) near Kavgolovskoe Lake near Oselki, 12 miles north from Saint Petersburg. Russia, September 20, 2013
Location on mapsDachnaya, 17, Toksovo, Leningrad Oblast, Russia
Birch webcap mushrooms (<B>Cortinarius triumphans</B>) near Kavgolovskoe Lake south from Oselki, 8 miles north from Saint Petersburg. Russia, <A HREF="../date-en/2015-09-23.htm">September 23, 2015</A>
LinkBirch webcap mushrooms (Cortinarius triumphans) near Kavgolovskoe Lake south from Oselki, 8 miles north from Saint Petersburg. Russia, September 23, 2015
Location on mapsКосогорная аллея, 9, Leningradskaya oblast', Russia, 188664

AI-generated summary of observations

Observations of Cortinarius triumphans in Leningrad Oblast and north-western Russia reveal that the fungus grows in forests around Kavgolovskoe Lake, near Saint Petersburg. The mushrooms were found on several occasions between September 6, 2013, and September 23, 2015. They were observed in various stages of growth, from young to mature, with caps of different sizes and shapes. The birch webcap mushrooms were typically found near Oselki, approximately 8-12 miles north of Saint Petersburg. The observations suggest that Cortinarius triumphans is a common species in this region, often growing in clusters or singly, and can be found in the area during the month of September. The fungus appears to thrive in the forest environment around Kavgolovskoe Lake, with multiple sightings recorded over several years.

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Links

Acknowledgements

Russian web-forums Planeta Gribov, V Kontakte, and Griby Sredney Polosy for learning names of local mushrooms.

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