Witches butter mushroom (jelly fungus, Exidia nigricans) in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, August 22, 2016
Parkovaya ul., 5, Tyarlevo, g. Sankt-Peterburg, Russia, 196625Synonyms: Exidia glandulosa, Exidia plana, Tremella nigricans, Tremella plana.
Common names: jelly fungus, warlock's butter.
Russian name: Eksidiya cherneiushchaya.
Extract from Wikipedia article: Exidia nigricans (common name Witches' butter) is a jelly fungus in the family Auriculariaceae. It is a common, wood-rotting species throughout the northern hemisphere, typically growing on dead attached branches of broadleaf trees. It has been much confused with Exidia glandulosa.
Exidia nigricans is a species of fungus that belongs to the family Auriculariaceae. It is a jelly fungus that grows on dead wood, typically appearing as black, ear-shaped or brain-like fruiting bodies. In St. Petersburg, Leningrad Oblast, and north-western Russia, Exidia nigricans has been found growing on various tree species, including birch, alder, and willow, often in moist, shaded areas such as forests, parks, and riverbanks. The fungus is commonly observed during the summer and autumn months, particularly after periods of heavy rainfall.
Witches butter mushroom (jelly fungus, Exidia nigricans) in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, August 22, 2016Parkovaya ul., 5, Tyarlevo, g. Sankt-Peterburg, Russia, 196625
Witches butter jelly fungus Exidia nigricans in Sosnovka Park. Saint Petersburg, Russia, March 15, 2017Svetlanovskiy pr., 55, Sankt-Peterburg, Russia, 194064
Witches butter jelly fungus Exidia nigricans on a stump in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, March 17, 2017Aptekarskaya nab., 6, Sankt-Peterburg, Russia, 197022
Witches butter mushroom (jelly fungus, Exidia nigricans) in Sosnovka Park. Saint Petersburg, Russia, April 4, 2017Svetlanovskiy pr., 51, Sankt-Peterburg, Russia, 194064
Witches butter (jelly fungus, Exidia nigricans or may be E. brunneola) in Sosnovka Park. Saint Petersburg, Russia, April 22, 2017Svetlanovskiy pr., 61к1, Sankt-Peterburg, Russia, 194064
Witches butter mushroom (jelly fungus, Exidia nigricans) on a fallen tree near Lisiy Nos, west from Saint Petersburg. Russia, May 6, 2019Primorskoye Shosse, Sankt-Peterburg, Russia, 197755
Witches butter mushroom (jelly fungus, Exidia nigricans) on a fallen birch near Lisiy Nos, west from Saint Petersburg. Russia, May 6, 2019Primorskoye Shosse, Sankt-Peterburg, Russia, 197755
Witches butter mushroom (jelly fungus, Exidia nigricans) with Panellus ringens(?) on a fallen birch near Lisiy Nos, west from Saint Petersburg. Russia, May 6, 2019Primorskoye Shosse, Sankt-Peterburg, Russia, 197755
Pattern of witches butter mushroom (jelly fungus, Exidia nigricans) on a fallen birch near Lisiy Nos, west from Saint Petersburg. Russia, May 6, 2019Primorskoye Shosse, Sankt-Peterburg, Russia, 197755
Texture of witches butter mushroom (jelly fungus, Exidia nigricans) on a fallen birch near Lisiy Nos, west from Saint Petersburg. Russia, May 6, 2019Primorskoye Shosse, Sankt-Peterburg, Russia, 197755
Witches butter mushroom (jelly fungus, Exidia nigricans) near Lisiy Nos, west from Saint Petersburg. Russia, May 6, 2019Primorskoye Shosse, Sankt-Peterburg, Russia, 197755
Jelly fungus Exidia nigricans on wood in a hazelnut forest on a slope of Orekhovaya Gora Hill in Duderhof Heights, south from Saint Petersburg. Russia, May 9, 2021Teatral'naya Ulitsa, 15А, Sankt-Peterburg, Russia, 198325
Jelly fungus Exidia nigricans on a fallen birch in Tarkhovka Park, west from Saint Petersburg. Russia, May 10, 2021Unnamed Road, Sankt-Peterburg, Russia, 197701
Close-up of jelly fungus Exidia nigricans on a fallen birch in Tarkhovka Park, west from Saint Petersburg. Russia, May 10, 2021Unnamed Road, Sankt-Peterburg, Russia, 197701
Jelly fungus Exidia nigricans on bark of a fallen birch in Tarkhovka Park, west from Saint Petersburg. Russia, May 10, 2021Unnamed Road, Sankt-Peterburg, Russia, 197701Exidia nigricans was observed in various locations throughout Leningrad Oblast and north-western Russia. The fungus was found growing on stumps, fallen trees, and branches in parks such as Pavlovsk Park, Sosnovka Park, and Tarkhovka Park. It was also spotted in the Botanic Gardens of Komarov Botanical Institute and on a slope of Orekhovaya Gora Hill in Duderhof Heights. The observations took place over several years, from 2016 to 2021, with multiple sightings in the spring months. The fungus was often found growing alone, but also co-occurred with other species, such as Panellus ringens. The observations included notes on the texture and pattern of the fungus, as well as its growth habits and substrates. Overall, Exidia nigricans appears to be a common and widespread species in the region.
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