Cylindrobasidium evolvens is a species of fungus that belongs to the family Cylindrobasidiaceae. It is characterized by its cylindrical basidia and thin-walled, smooth spores. In St. Petersburg, Leningrad Oblast, and north-western Russia, Cylindrobasidium evolvens has been found growing on decaying wood, particularly on coniferous trees such as spruce and pine. It typically fruits in late summer to early autumn, forming resupinate or effused-reflexed basidiocarps with a pale yellow to buff-colored hymenium. The fungus is considered rare in the region, but can be locally common in areas with abundant decaying coniferous wood.
Corticioid fungus (mushroom) Cylindrobasidium evolvens on a fallen tree near northern road in Yuntolovsky Park. Saint Petersburg, Russia, March 1, 2017 Konnolakhtinskaya dor., g. Sankt-Peterburg, Russia, 197229
Crust of a mushroom Cylindrobasidium evolvens on a fallen tree near northern road in Yuntolovsky Park. Saint Petersburg, Russia, March 1, 2017 Konnolakhtinskaya dor., g. Sankt-Peterburg, Russia, 197229
Corticioid fungus (mushroom) Cylindrobasidium evolvens spreading on a fallen tree near northern road in Yuntolovsky Park. Saint Petersburg, Russia, March 1, 2017 Konnolakhtinskaya dor., g. Sankt-Peterburg, Russia, 197229
Texture of corticioid fungus (mushroom) Cylindrobasidium evolvens on a fallen tree near northern road in Yuntolovsky Park. Saint Petersburg, Russia, March 1, 2017 Konnolakhtinskaya dor., g. Sankt-Peterburg, Russia, 197229
Purple crust of a mushroom Cylindrobasidium evolvens on a fallen tree near northern road in Yuntolovsky Park. Saint Petersburg, Russia, March 1, 2017 Konnolakhtinskaya dor., g. Sankt-Peterburg, Russia, 197229
Fungus (mushroom) Cylindrobasidium evolvens growing on fallen birch leaves on peat in swampy area of Sosnovka Park. Saint Petersburg, Russia, March 23, 2017 Severnyy pr., 24к1, Sankt-Peterburg, Russia, 194295
Fungus (mushroom) Cylindrobasidium evolvens growing on fallen birch leaves taken from peat area in Sosnovka Park. Saint Petersburg, Russia, March 23, 2017 pr. Raevskogo, 24, Sankt-Peterburg, Russia, 194064
Corticioid fungus Cylindrobasidium evolvens(?) near Lisiy Nos, west from Saint Petersburg. Russia, April 24, 2017 Primorskoye sh., g. Sankt-Peterburg, Russia, 197755
Corticioid fungus Cylindrobasidium evolvens(?) near Lisiy Nos, west from Saint Petersburg. Russia, April 24, 2017 Primorskoye sh., g. Sankt-Peterburg, Russia, 197755
Corticioid fungus Cylindrobasidium evolvens(?) on a tree stump near Lisiy Nos, west from Saint Petersburg. Russia, April 24, 2017 Primorskoye sh., g. Sankt-Peterburg, Russia, 197755
Corticioid (crust) fungus (mushroom) Cylindrobasidium evolvens on a cut tree near Lisiy Nos, west from Saint Petersburg. Russia, May 6, 2019 Saint Petersburg, Russia, 197755
Pattern of a crust fungus (mushroom) Cylindrobasidium evolvens on a cut tree near Lisiy Nos, west from Saint Petersburg. Russia, May 6, 2019 Saint Petersburg, Russia, 197755
Texture of a crust fungus (mushroom) Cylindrobasidium evolvens on a cut tree near Lisiy Nos, west from Saint Petersburg. Russia, May 6, 2019 Saint Petersburg, Russia, 197755
Close up of a crust fungus (mushroom) Cylindrobasidium evolvens on a cut tree near Lisiy Nos, west from Saint Petersburg. Russia, May 6, 2019 Saint Petersburg, Russia, 197755
Crust fungus Cylindrobasidium evolvens together with some white resupinate polypore and tiny cup-shaped packed growths of cyphelloid fungus Merismodes anomala below Cylindrobasidium on a fallen spruce without bark near Dibuny, north-west from Saint Petersburg, Russia, May 5, 2021 Leninskaya Tropa, Sankt-Peterburg, Russia, 197758
Corticioid (crust) fungus Cylindrobasidium evolvens on a fallen tree in a spruce forest near Dibuny, north-west from Saint Petersburg, Russia, May 5, 2021 Leninskaya Tropa, Sankt-Peterburg, Russia, 197758
Close-up of corticioid (crust) fungus Cylindrobasidium evolvens on a fallen tree in a spruce forest near Dibuny, north-west from Saint Petersburg, Russia, May 5, 2021 Leninskaya Tropa, Sankt-Peterburg, Russia, 197758
Growth pattern of corticioid (crust) fungus Cylindrobasidium evolvens on a fallen tree in a spruce forest near Dibuny, north-west from Saint Petersburg, Russia, May 5, 2021 Leninskaya Tropa, Sankt-Peterburg, Russia, 197758
Bumpy texture of corticioid (crust) fungus Cylindrobasidium evolvens on a fallen tree in a spruce forest near Dibuny, north-west from Saint Petersburg, Russia, May 5, 2021 Leninskaya Tropa, Sankt-Peterburg, Russia, 197758
Corticioid (crust) fungus Cylindrobasidium evolvens and tiny cup-shaped cyphelloid fungus Merismodes anomala forming packed growths on a fallen spruce tree near Dibuny, north-west from Saint Petersburg, Russia, May 5, 2021 Leninskaya Tropa, Sankt-Peterburg, Russia, 197758
Margin of corticioid (crust) fungus Cylindrobasidium evolvens on a fallen tree in a spruce forest near Dibuny, north-west from Saint Petersburg, Russia, May 5, 2021 Leninskaya Tropa, Sankt-Peterburg, Russia, 197758
AI-generated summary of observations
Cylindrobasidium evolvens was observed growing on various substrates in Leningrad Oblast and north-western Russia. The fungus formed crusts on fallen trees, stumps, and cut wood, often with a purple or bumpy texture. It was found in different habitats, including Yuntolovsky Park, Sosnovka Park, and spruce forests near Dibuny and Lisiy Nos. The observations showed that Cylindrobasidium evolvens can grow on birch leaves, peat, and tree bark, and can co-occur with other fungi, such as Merismodes anomala. The fungus was observed at different times of the year, from March to May, and its growth patterns varied, including spreading, crust-like, and bumpy textures. Overall, Cylindrobasidium evolvens appears to be a common species in the region, with a wide range of substrates and habitats.
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