Stipitate form of a mushroom Sistotrema confluens that looks like a small tooth fungus near Kavgolovskoe Lake in Toksovo, north from Saint Petersburg. Russia, August 2, 2016
Dachnaya ul., Leningradskaya oblast', Russia, 188664Synonyms: Hydnotrema confluens, Hydnum sublamellosum, Irpex anomalus, Irpex confluens, Sistotrema ericetorum, Sistotrema membranaceum, Sistotrema sublamellosum, Trechispora ericetorum.
Common name: aromatic earthfan.
Russian name: Sistotrema slivaiushchayasya.
Sistotrema confluens is a species of fungus that belongs to the family Hydnaceae. It is characterized by its effused to slightly reflexed basidiocarps, white to cream-colored, with a smooth to tuberculate hymenial surface and cylindrical to subclavate basidiospores. In St. Petersburg, Leningrad Oblast, and north-western Russia, Sistotrema confluens has been found growing on various substrates including decaying wood, mosses, and soil, typically in coniferous forests, particularly with spruce and pine. The fungus is considered rare to occasional in the region, fruiting from summer to autumn.
Stipitate form of a mushroom Sistotrema confluens that looks like a small tooth fungus near Kavgolovskoe Lake in Toksovo, north from Saint Petersburg. Russia, August 2, 2016Dachnaya ul., Leningradskaya oblast', Russia, 188664
Stipitate form of a mushroom Sistotrema confluens that looks like a small tooth fungus near Kavgolovo Lake, north from Saint Petersburg. Russia, September 5, 2016Dachnaya ul., Leningradskaya oblast', Russia, 188664
Mushrooms Sistotrema confluens that looks like a small tooth fungus near Dibuny, west from Saint Petersburg. Russia, September 7, 2016Unnamed Road, Pesochnyy, g. Sankt-Peterburg, Russia
Aromatic earthfan mushrooms (Sistotrema confluens) on roadside on west side of Kavgolovskoe Lake near Toksovo, north from Saint Petersburg. Russia, August 25, 2017Dachnaya Ulitsa, Leningradskaya oblast', Russia, 188664
Aromatic earthfan mushrooms (Sistotrema confluens) west from Kavgolovskoe Lake near Toksovo, north from Saint Petersburg. Russia, September 1, 2017Dachnaya Ulitsa, Leningradskaya oblast', Russia, 188664
Aromatic earthfan mushrooms (Sistotrema confluens) near Lembolovo, 40 miles north from Saint Petersburg. Russia, September 9, 2017Unnamed Road, Leningradskaya oblast', Russia, 188695
Aromatic earthfan mushrooms (Sistotrema confluens) near Dibuny, north-west from Saint Petersburg. Russia, September 28, 2017Zapadniy Skorostnoy Diameter, Sankt-Peterburg, Russia, 197758
Immature stipitate form of mushrooms Sistotrema confluens on roadside near Kavgolovskoe Lake south from Oselki, 8 miles north from Saint Petersburg. Russia, August 29, 2018Leningrad Oblast, Russia, 188665
Immature mushrooms Sistotrema confluens in a roadside ditch near Dibuny, north-west from Saint Petersburg, Russia, September 3, 2018Leninskaya Tropa, Sankt-Peterburg, Russia, 197758Observations of the fungus Sistotrema confluens in Leningrad Oblast and north-western Russia reveal its presence in various locations. The stipitate form of the mushroom was found near Kavgolovskoe Lake in Toksovo, with sightings on August 2, 2016, and September 5, 2016. Similar forms were also observed near Dibuny on September 7, 2016. In 2017, aromatic earthfan mushrooms were spotted on the west side of Kavgolovskoe Lake, near Toksovo, on August 25, and again on September 1. Further sightings occurred near Lembolovo on September 9, 2017, and Dibuny on September 28, 2017. In 2018, immature stipitate forms were found near Kavgolovskoe Lake on August 29, and immature mushrooms were discovered in a roadside ditch near Dibuny on September 3. These observations suggest that Sistotrema confluens is widespread in the region, with varying forms and maturity stages present throughout the summer and early fall.
Russian web-forums Planeta Gribov, V Kontakte, and Griby Sredney Polosy for learning names of local mushrooms.
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