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Fungi: Basidiomycota: Agaricomycetes: Polyporales: Fomitopsidaceae: Climacocystis borealis (Fr.) Kotl. & Pouzar, 1958

Climacocystis borealis

Synonyms: Abortiporus borealis, Bjerkandera borealis, Bjerkandera irpicoides, Boletus borealis, Daedalea borealis, Grifola pacifica, Heteroporus borealis, Inonotus irpicoides, Leptoporus borealis, Polyporus ambiens, Polyporus borealis, Polyporus irpicoides, Polyporus pacificus, Polyporus piceus, Polystictus borealis, Postia borealis, Spongipellis ambiens, Spongipellis borealis, Tyromyces borealis.

Russian name: Klimakotsistis severnyy.

Extract from Wikipedia article: Climacocystis borealis is a species of poroid fungus in the family Fomitopsidaceae.

AI-generated description

Climacocystis borealis is a species of fungus in the family Fomitopsidaceae. It is a brown rot fungus that grows on coniferous trees, particularly spruce and pine. In St. Petersburg, Leningrad Oblast, and north-western Russia, Climacocystis borealis has been found to be widely distributed, often occurring on dead or dying trees in forests and urban areas. The fungus produces annual growth layers and can form large, bracket-like fruiting bodies that are 5-20 cm in diameter. It is a common species in the region's coniferous forests, playing a role in decomposing wood and recycling nutrients.

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

Poroid fungus (mushroom) <B>Climacocystis borealis</B>(?) in Lomonosov (Oranienbaum). West from Saint Petersburg, Russia, <A HREF="../date-en/2016-10-11.htm">October 11, 2016</A>
LinkPoroid fungus (mushroom) Climacocystis borealis(?) in Lomonosov (Oranienbaum). West from Saint Petersburg, Russia, October 11, 2016
Location on mapsKrasnoflotskoye sh., 12, Lomonosov, g. Sankt-Peterburg, Russia, 198412
Soft light-yellow poroid fungus (mushroom) <B>Climacocystis borealis</B>(?) in Lomonosov (Oranienbaum). West from Saint Petersburg, Russia, <A HREF="../date-en/2016-10-11.htm">October 11, 2016</A>
LinkSoft light-yellow poroid fungus (mushroom) Climacocystis borealis(?) in Lomonosov (Oranienbaum). West from Saint Petersburg, Russia, October 11, 2016
Location on mapsKrasnoflotskoye sh., 12, Lomonosov, g. Sankt-Peterburg, Russia, 198412
Immature poroid fungus <B>Climacocystis borealis</B> on a spruce stump in Tarkhovka near Sestroretsk, west from Saint Petersburg. Russia, <A HREF="../date-en/2018-08-27.htm">August 27, 2018</A>
LinkImmature poroid fungus Climacocystis borealis on a spruce stump in Tarkhovka near Sestroretsk, west from Saint Petersburg. Russia, August 27, 2018
Location on mapsUnnamed Road, Sankt-Peterburg, Russia, 197701
Immature poroid mushrooms <B>Climacocystis borealis</B> on a spruce stump in Tarkhovka near Sestroretsk, west from Saint Petersburg. Russia, <A HREF="../date-en/2018-08-27.htm">August 27, 2018</A>
LinkImmature poroid mushrooms Climacocystis borealis on a spruce stump in Tarkhovka near Sestroretsk, west from Saint Petersburg. Russia, August 27, 2018
Location on mapsUnnamed Road, Sankt-Peterburg, Russia, 197701
Immature poroid fungus <B>Climacocystis borealis</B> near Kavgolovskoe Lake south from Oselki, 8 miles north from Saint Petersburg. Russia, <A HREF="../date-en/2018-08-29.htm">August 29, 2018</A>
LinkImmature poroid fungus Climacocystis borealis near Kavgolovskoe Lake south from Oselki, 8 miles north from Saint Petersburg. Russia, August 29, 2018
Location on mapsLeningrad Oblast, Russia, 188667
Young polypore mushrooms <B>Climacocystis borealis</B> on a spruce near Lisiy Nos, west from Saint Petersburg. Russia, <A HREF="../date-en/2018-09-01.htm">September 1, 2018</A>
LinkYoung polypore mushrooms Climacocystis borealis on a spruce near Lisiy Nos, west from Saint Petersburg. Russia, September 1, 2018
Location on mapsSaint Petersburg, Russia, 197755
<B>Climacocystis borealis</B> mushrooms on a spruce stump near Lisiy Nos, west from Saint Petersburg. Russia, <A HREF="../date-en/2018-09-01.htm">September 1, 2018</A>
LinkClimacocystis borealis mushrooms on a spruce stump near Lisiy Nos, west from Saint Petersburg. Russia, September 1, 2018
Location on mapsPrimorskoye Shosse, Sankt-Peterburg, Russia, 197755
Immature mushrooms <B>Climacocystis borealis</B> on a cut surface of a spruce stump near the main road to Lindulovskaya Larch Grove, near Roshchino, 30 miles north-west from Saint Petersburg. Russia, <A HREF="../date-en/2018-09-04.htm">September 4, 2018</A>
LinkImmature mushrooms Climacocystis borealis on a cut surface of a spruce stump near the main road to Lindulovskaya Larch Grove, near Roshchino, 30 miles north-west from Saint Petersburg. Russia, September 4, 2018
Location on mapsUlitsa Sukhotskogo, Leningradskaya oblast', Russia, 188820

AI-generated summary of observations

Climacocystis borealis was observed in various locations in Leningrad Oblast and north-western Russia. In Lomonosov, it appeared as a poroid fungus with a soft light-yellow color on October 11, 2016. Later observations showed immature specimens on spruce stumps in Tarkhovka near Sestroretsk on August 27, 2018, and near Kavgolovskoe Lake on August 29, 2018. Young polypore mushrooms were found on a spruce near Lisiy Nos on September 1, 2018, and on a spruce stump in the same area. Further observations included immature mushrooms on a cut spruce stump near Lindulovskaya Larch Grove on September 4, 2018. The fungus was consistently associated with spruce trees or stumps, suggesting a specific substrate preference. The observations spanned late summer to early fall, indicating a possible fruiting period during this time.

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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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