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Fungi: Ascomycota: Leotiomycetes: Helotiales: Helotiaceae: Bisporella citrina (Batsch) Korf & S.E. Carp., 1974

Bisporella citrina – Lemon disco

Synonyms: Calycella citrina, Calycella flava, Calycina citrina, Calycina flava, Helotium citrinum, Helotium flavum, Octospora citrina, Peziza citrina.

Common name: lemon disco.

Russian name: Bisporella limonnaya.

Extract from Wikipedia article: Bisporella citrina, commonly known as yellow fairy cups or lemon discos, is a species of fungus in the family Helotiaceae. The fungus produces tiny yellow cups up to 3 mm (0.12 in) in diameter, often without stalks, that fruit in groups or dense clusters on decaying deciduous wood that has lost its bark. The widely distributed species is found in North Africa, Asia, Europe, North America, and Central and South America. Found in late summer and autumn, the fungus is fairly common, but is easily overlooked owing to its small size. There are several similar species that can in most cases be distinguished by differences in color, morphology, or substrate. Microscopically, B. citrina can be distinguished from these lookalikes by its elliptical spores, which have a central partition, and an oil drop at each end.

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

Lemon discos mushrooms (<B>Bisporella citrina</B>) in Sosnovka Park. Saint Petersburg, Russia, <A HREF="../date-en/2016-08-25.htm">August 25, 2016</A>
LinkLemon discos mushrooms (Bisporella citrina) in Sosnovka Park. Saint Petersburg, Russia, August 25, 2016
Lemon discos mushrooms (yellow fairy cups, <B>Bisporella citrina</B>) in Sosnovka Park. Saint Petersburg, Russia, <A HREF="../date-en/2016-08-25.htm">August 25, 2016</A>
LinkLemon discos mushrooms (yellow fairy cups, Bisporella citrina) in Sosnovka Park. Saint Petersburg, Russia, August 25, 2016
Lemon discos mushrooms (yellow fairy cups, <B>Bisporella citrina</B>) on a tree branch near Lisiy Nos, south from Saint Petersburg. Russia, <A HREF="../date-en/2016-09-03.htm">September 3, 2016</A>
LinkLemon discos mushrooms (yellow fairy cups, Bisporella citrina) on a tree branch near Lisiy Nos, south from Saint Petersburg. Russia, September 3, 2016
Location on mapsСанкт-Петербург, Приморский район, муниципальный округ Лахта-Ольгино
Close up of Lemon discos mushrooms (yellow fairy cups, <B>Bisporella citrina</B>) near Lisiy Nos, south from Saint Petersburg. Russia, <A HREF="../date-en/2016-09-03.htm">September 3, 2016</A>
LinkClose up of Lemon discos mushrooms (yellow fairy cups, Bisporella citrina) near Lisiy Nos, south from Saint Petersburg. Russia, September 3, 2016
Location on mapsСанкт-Петербург, Приморский район, муниципальный округ Лахта-Ольгино
Lemon discos mushrooms (<B>Bisporella citrina</B>) in Sosnovka Park. Saint Petersburg, Russia, <A HREF="../date-en/2016-09-13.htm">September 13, 2016</A>
LinkLemon discos mushrooms (Bisporella citrina) in Sosnovka Park. Saint Petersburg, Russia, September 13, 2016
Location on mapsСанкт-Петербург, Выборгский район, парк Сосновка
Close up of lemon discos mushrooms (<B>Bisporella citrina</B>) in Sosnovka Park. Saint Petersburg, Russia, <A HREF="../date-en/2016-09-13.htm">September 13, 2016</A>
LinkClose up of lemon discos mushrooms (Bisporella citrina) in Sosnovka Park. Saint Petersburg, Russia, September 13, 2016
Location on mapsСанкт-Петербург, Выборгский район, парк Сосновка
Lemon discos mushrooms (yellow fairy cups, <B>Bisporella citrina</B>) near Pervomayskoe, Vyborg Region. Russia, <A HREF="../date-en/2016-09-30.htm">September 30, 2016</A>
LinkLemon discos mushrooms (yellow fairy cups, Bisporella citrina) near Pervomayskoe, Vyborg Region. Russia, September 30, 2016
Location on mapsЛенинградская область, А-181 Скандинавия
Lemon discos mushrooms (yellow fairy cups, <B>Bisporella citrina</B>) in Lisiy Nos, west from Saint Petersburg. Russia, <A HREF="../date-en/2016-10-09.htm">October 9, 2016</A>
LinkLemon discos mushrooms (yellow fairy cups, Bisporella citrina) in Lisiy Nos, west from Saint Petersburg. Russia, October 9, 2016
Location on mapsСанкт-Петербург, поселок Лисий Нос
Rotten branch with lemon discos mushrooms (yellow fairy cups, <B>Bisporella citrina</B>) in Lisiy Nos, west from Saint Petersburg. Russia, <A HREF="../date-en/2016-10-09.htm">October 9, 2016</A>
LinkRotten branch with lemon discos mushrooms (yellow fairy cups, Bisporella citrina) in Lisiy Nos, west from Saint Petersburg. Russia, October 9, 2016
Location on mapsСанкт-Петербург, поселок Лисий Нос
Lemon discos mushrooms (yellow fairy cups, <B>Bisporella citrina</B>) or may be Hymenoscyphus serotinus in Dibuny, north-west from Saint Petersburg, Russia, <A HREF="../date-en/2016-10-23.htm">October 23, 2016</A>
LinkLemon discos mushrooms (yellow fairy cups, Bisporella citrina) or may be Hymenoscyphus serotinus in Dibuny, north-west from Saint Petersburg, Russia, October 23, 2016
Location on mapsСанкт-Петербург, Курортный район, посёлок Песочный
Lemon discos mushrooms (yellow fairy cups, <B>Bisporella citrina</B>) in Sosnovka Park. Saint Petersburg, Russia, <A HREF="../date-en/2016-11-23.htm">November 23, 2016</A>
LinkLemon discos mushrooms (yellow fairy cups, Bisporella citrina) in Sosnovka Park. Saint Petersburg, Russia, November 23, 2016
Location on mapsСанкт-Петербург, Выборгский район, муниципальный округ Сосновское, Лиственная аллея
Lemon discos mushrooms (yellow fairy cups, <B>Bisporella citrina</B>) on a stump in Sosnovka Park. Saint Petersburg, Russia, <A HREF="../date-en/2016-11-23.htm">November 23, 2016</A>
LinkLemon discos mushrooms (yellow fairy cups, Bisporella citrina) on a stump in Sosnovka Park. Saint Petersburg, Russia, November 23, 2016
Location on mapsСанкт-Петербург, Выборгский район, муниципальный округ Сосновское, Лиственная аллея

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Acknowledgements

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

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