Yellowing curtain crust mushrooms (Stereum subtomentosum) in Sosnovka Park. Saint Petersburg, Russia, August 25, 2016Synonyms: Stereum arcticum, Stereum insignitum, Stereum ochroleucum.
Common name: yellowing curtain crust.
Russian name: Stereum nezhnovoylochnyy.
Stereum subtomentosum is a crustose fungus that grows on dead wood, typically on deciduous trees. In St. Petersburg, Leningrad Oblast, and north-western Russia, it has been found to fruit from July to November, commonly on birch, alder, and willow. The fungus forms effused-reflexed to ungulate basidiocarps with a hairy to subtomentose upper surface and a smooth to wrinkled hymenial surface. It is widely distributed in the region, including urban and natural areas, and can be found on stumps, logs, and living trees with dead branches.
Yellowing curtain crust mushrooms (Stereum subtomentosum) in Sosnovka Park. Saint Petersburg, Russia, August 25, 2016
Yellowing curtain crust mushrooms (Stereum subtomentosum) in Sosnovka Park. Saint Petersburg, Russia, October 31, 2016
Pamyatnik Voyennym Letchikam, Sankt-Peterburg, Russia, 194223
Yellowing curtain crust mushrooms (Stereum subtomentosum) on a birch log in Sosnovka Park. Saint Petersburg, Russia, October 31, 2016Unnamed Road, Sankt-Peterburg, Russia
Yellowing curtain crust mushrooms (Stereum subtomentosum) on a fallen log in Orekhovo, 40 miles north from Saint Petersburg. Russia, March 18, 2017Unnamed Road, Orekhovo, Leningradskaya oblast', Russia, 188731
Yellowing curtain crust mushrooms (Stereum subtomentosum) in area of an old brick factory between Pesochnaya and Dibuny north-west from Saint Petersburg. Russia, March 26, 2017Proletarskiy pr., 31, Pesochnyy, g. Sankt-Peterburg, Russia, 197758
Yellowing curtain crust mushrooms (Stereum subtomentosum)(?) near Lisiy Nos, west from Saint Petersburg. Russia, July 18, 2017Primorskoye sh., Sankt-Peterburg, Russia, 197755
Yellowing curtain crust mushrooms (Stereum subtomentosum)(?) on a log near Lisiy Nos. West from Saint Petersburg, Russia, August 23, 2017Polyanskaya Doroga, Sankt-Peterburg, Russia, 197755
Yellowing curtain crust fungus (Stereum subtomentosum)(?) near Lisiy Nos. West from Saint Petersburg, Russia, August 23, 2017Polyanskaya Doroga, Sankt-Peterburg, Russia, 197755
Yellowing curtain crust mushrooms (Stereum subtomentosum) on a fallen spruce tree near Lisiy Nos. West from Saint Petersburg, Russia, August 23, 2017Primorskoye Shosse, Sankt-Peterburg, Russia, 197755
Masses of yellowing curtain crust mushrooms (Stereum subtomentosum) on a fallen spruce tree near Lisiy Nos. West from Saint Petersburg, Russia, August 23, 2017Primorskoye Shosse, Sankt-Peterburg, Russia, 197755
Yellowing curtain crust mushrooms (Stereum subtomentosum)(?) on a fallen tree on a beach in Tarkhovka Park, west from Saint Petersburg. Russia, August 26, 2017Peschanaya Ulitsa, 1, Tarkhovka, Sankt-Peterburg, Russia, 197701
Yellowing curtain crust fungus (Stereum subtomentosum)(?) near Lisiy Nos. West from Saint Petersburg, Russia, August 26, 2018Saint Petersburg, Russia, 197755
Yellowing curtain crust mushrooms (Stereum subtomentosum)(?) on a fallen tree near Lisiy Nos, west from Saint Petersburg. Russia, September 1, 2018Primorskoye Shosse, Sankt-Peterburg, Russia, 197755Observations of Stereum subtomentosum in Leningrad Oblast and north-western Russia show that the fungus is widely distributed in the region. It was found growing on various substrates, including birch logs, fallen spruce trees, and other deciduous and coniferous trees. The fungus was observed in different locations, such as Sosnovka Park, Orekhovo, and Lisiy Nos, often in large quantities. The observations were made during different times of the year, from March to October, suggesting that the fungus can grow and fruit throughout the growing season. In some cases, the identification of the fungus was uncertain, indicated by a question mark, but overall, the observations suggest that Stereum subtomentosum is a common species in the region. The fungus was often found on fallen trees, logs, and other woody debris, indicating its role as a decomposer in the ecosystem.
Russian web-forums Planeta Gribov, V Kontakte, and Griby Sredney Polosy for learning names of local mushrooms.
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