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Fungi: Ascomycota: Leotiomycetes: Helotiales: Helotiaceae: Hymenoscyphus serotinus (Pers.) W. Phillips, 1887

Hymenoscyphus serotinus

Synonyms: Helotium serotinum, Lanzia serotina, Peziza serotina.

Russian name: Gimenostsifus pozdniy.

AI-generated description

Hymenoscyphus serotinus is an ascomycete fungus that grows on decaying plant material, particularly on rotting wood and herbaceous stems. In St. Petersburg, Leningrad Oblast, and north-western Russia, it has been found to be widely distributed, often fruiting in late summer to autumn. The fungus produces small, cup-shaped apothecia with white or cream-colored hymenium and a short, hairy stipe. It is commonly associated with moist, shaded environments, such as forest edges, woodland streams, and damp meadows. Local studies have reported H. serotinus as a frequent component of fungal communities in these regions, indicating its adaptability to the cool, humid climate of north-western Russia.

Photos of this mushroom from the area of St. Petersburg, Russia

Small ascomycete fungi <B>Hymenoscyphus serotinus</B>(?) on ash tree in lower Sergievka Park. Old Peterhof, west from Saint Petersburg, Russia, <A HREF="../date-en/2017-10-05.htm">October 5, 2017</A>
LinkSmall ascomycete fungi Hymenoscyphus serotinus(?) on ash tree in lower Sergievka Park. Old Peterhof, west from Saint Petersburg, Russia, October 5, 2017
Location on mapsOraniyenbaumskoye Shosse, 2, Petergof, Sankt-Peterburg, Russia, 198504
Tiny cup fungus <B>Hymenoscyphus serotinus</B>(?) on bark of ash tree in lower Sergievka Park. Old Peterhof, west from Saint Petersburg, Russia, <A HREF="../date-en/2017-10-05.htm">October 5, 2017</A>
LinkTiny cup fungus Hymenoscyphus serotinus(?) on bark of ash tree in lower Sergievka Park. Old Peterhof, west from Saint Petersburg, Russia, October 5, 2017
Location on mapsOraniyenbaumskoye Shosse, 2, Petergof, Sankt-Peterburg, Russia, 198504
Tiny cup mushrooms <B>Hymenoscyphus serotinus</B>(?) at the base of ash tree in lower Sergievka Park. Old Peterhof, west from Saint Petersburg, Russia, <A HREF="../date-en/2017-10-05.htm">October 5, 2017</A>
LinkTiny cup mushrooms Hymenoscyphus serotinus(?) at the base of ash tree in lower Sergievka Park. Old Peterhof, west from Saint Petersburg, Russia, October 5, 2017
Location on mapsOraniyenbaumskoye Shosse, 2, Petergof, Sankt-Peterburg, Russia, 198504

AI-generated summary of observations

Observations of Hymenoscyphus serotinus in Leningrad Oblast and north-western Russia reveal its presence on ash trees. On October 5, 2017, small ascomycete fungi were found on an ash tree in lower Sergievka Park, Old Peterhof, west of Saint Petersburg. The fungus was also observed as a tiny cup fungus on the bark of an ash tree in the same park. Additionally, tiny cup mushrooms were discovered at the base of an ash tree in the same location. These findings suggest that Hymenoscyphus serotinus is associated with ash trees in this region, and can be found growing on the trees themselves, as well as on the surrounding soil or debris. The fungus appears to be relatively small in size, forming tiny cups or mushrooms that are easily overlooked. Its presence was documented in multiple locations within the park.

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Links

Acknowledgements

Russian web-forums Planeta Gribov, V Kontakte, and Griby Sredney Polosy for learning names of local mushrooms.

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