Corticioid fungus (mushroom) Cylindrobasidium evolvens on a fallen tree near northern road in Yuntolovsky Park. Saint Petersburg, Russia, March 1, 2017Synonyms: Auricularia evolvens, Basidioradulum evolvens, Ceraceomyces evolvens, Corticium evolvens, Hyphoderma arizonicum, Stereum evolvens, Terana evolvens, Thelephora evolvens.
Russian name: Tsilindrobazidium razvorachivaiushchiysya.
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
Crust of a mushroom Cylindrobasidium evolvens on a fallen tree near northern road in Yuntolovsky Park. Saint Petersburg, Russia, March 1, 2017
Corticioid fungus (mushroom) Cylindrobasidium evolvens spreading on a fallen tree near northern road in Yuntolovsky Park. Saint Petersburg, Russia, March 1, 2017
Texture of corticioid fungus (mushroom) Cylindrobasidium evolvens on a fallen tree near northern road in Yuntolovsky Park. Saint Petersburg, Russia, March 1, 2017
Purple crust of a mushroom Cylindrobasidium evolvens on a fallen tree near northern road in Yuntolovsky Park. Saint Petersburg, Russia, March 1, 2017
Fungus (mushroom) Cylindrobasidium evolvens growing on fallen birch leaves on peat in swampy area of Sosnovka Park. Saint Petersburg, Russia, March 23, 2017
Fungus (mushroom) Cylindrobasidium evolvens growing on fallen birch leaves taken from peat area in Sosnovka Park. Saint Petersburg, Russia, March 23, 2017
Corticioid fungus Cylindrobasidium evolvens(?) near Lisiy Nos, west from Saint Petersburg. Russia, April 24, 2017
Corticioid fungus Cylindrobasidium evolvens(?) near Lisiy Nos, west from Saint Petersburg. Russia, April 24, 2017
Corticioid fungus Cylindrobasidium evolvens(?) on a tree stump near Lisiy Nos, west from Saint Petersburg. Russia, April 24, 2017
Corticioid (crust) fungus (mushroom) Cylindrobasidium evolvens on a cut tree near Lisiy Nos, west from Saint Petersburg. Russia, May 6, 2019
Pattern of a crust fungus (mushroom) Cylindrobasidium evolvens on a cut tree near Lisiy Nos, west from Saint Petersburg. Russia, May 6, 2019
Texture of a crust fungus (mushroom) Cylindrobasidium evolvens on a cut tree near Lisiy Nos, west from Saint Petersburg. Russia, May 6, 2019
Close up of a crust fungus (mushroom) Cylindrobasidium evolvens on a cut tree near Lisiy Nos, west from Saint Petersburg. Russia, May 6, 2019
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
Corticioid (crust) fungus Cylindrobasidium evolvens on a fallen tree in a spruce forest near Dibuny, north-west from Saint Petersburg, Russia, May 5, 2021
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
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
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
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
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, 2021Cylindrobasidium 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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