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Fungi: Basidiomycota: Agaricomycetes: Agaricales: Tricholomataceae: Phyllotopsis nidulans (Pers.) Singer, 1936

Phyllotopsis nidulans – Orange mock oyster

Synonyms: Agaricus jonquilla, Agaricus nidulans, Claudopus nidulans, Crepidotus jonquilla, Crepidotus nidulans, Dendrosarcus nidulans, Panus nidulans, Panus stevensonii, Pleurotus nidulans, Pocillaria stevensonii.

Common name: orange mock oyster.

Russian names: Fillotopsis gnezdoobraznyy, Veshenka oranzhevaya, Fillotopsis gnezdovidnyy, Fillotopsis gnezdyashchiysya.

Extract from Wikipedia article: Phyllotopsis nidulans, commonly known as the mock oyster or the orange oyster, is a species of fungus in the family Tricholomataceae, and the type species of the genus Phyllotopsis. It is widely dispersed in temperate zones of the Northern Hemisphere, where it grows on decaying wood. The fungus fruit body consists of a fan-shaped, light orange fuzzy cap up to 8 cm (3 in) wide that grows singly or in overlapping clusters. On the cap underside are crowded orange gills. Mock oyster mushrooms have a strong, unpleasant odor, although they are not known to be poisonous.

AI-generated description

Phyllotopsis nidulans is a species of fungus that grows on decaying wood and other organic matter. In St. Petersburg, Leningrad Oblast, and north-western Russia, it has been found in coniferous and mixed forests, often associated with spruce and pine trees. The fungus typically fruits in late summer to early fall, producing yellow to orange-yellow funnel-shaped caps with a wavy or lobed margin. It is considered a rare species in the region, but can be locally abundant in areas with suitable habitat.

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

Orange oyster mushrooms (<B>Phyllotopsis nidulans</B>) on a thrown away wooden door in Lembolovo, 35 miles north from Saint Petersburg. Russia, <A HREF="../date-en/2016-08-31.htm">August 31, 2016</A>
LinkOrange oyster mushrooms (Phyllotopsis nidulans) on a thrown away wooden door in Lembolovo, 35 miles north from Saint Petersburg. Russia, August 31, 2016
Location on mapsUnnamed Road, Vaskelovo, Leningradskaya oblast', Russia, 188695
Orange oyster mushrooms (<B>Phyllotopsis nidulans</B>) in Lisiy Nos, west from Saint Petersburg. Russia, <A HREF="../date-en/2016-10-09.htm">October 9, 2016</A>
LinkOrange oyster mushrooms (Phyllotopsis nidulans) in Lisiy Nos, west from Saint Petersburg. Russia, October 9, 2016
Location on mapsPolyanskaya dor., g. Sankt-Peterburg, Russia, 197755
Orange oyster mushrooms (<B>Phyllotopsis nidulans</B>) in Sosnovka Park. Saint Petersburg, Russia, <A HREF="../date-en/2017-03-20.htm">March 20, 2017</A>
LinkOrange oyster mushrooms (Phyllotopsis nidulans) in Sosnovka Park. Saint Petersburg, Russia, March 20, 2017
Location on mapsUnnamed Road, Sankt-Peterburg, Russia, 194064
Orange mock oyster mushrooms (<B>Phyllotopsis nidulans</B>) in Blizhnie Dubki area near Lisiy Nos, west from Saint Petersburg. Russia, <A HREF="../date-en/2017-09-11.htm">September 11, 2017</A>
LinkOrange mock oyster mushrooms (Phyllotopsis nidulans) in Blizhnie Dubki area near Lisiy Nos, west from Saint Petersburg. Russia, September 11, 2017
Location on mapsPolyanskaya Doroga, Sankt-Peterburg, Russia, 197755
Orange oyster mushrooms (<B>Phyllotopsis nidulans</B>) with bleached caps on a birch log near Lisiy Nos, west from Saint Petersburg. Russia, <A HREF="../date-en/2018-09-01.htm">September 1, 2018</A>
LinkOrange oyster mushrooms (Phyllotopsis nidulans) with bleached caps on a birch log near Lisiy Nos, west from Saint Petersburg. Russia, September 1, 2018
Location on mapsSaint Petersburg, Russia, 197755
Orange mock oyster mushrooms (<B>Phyllotopsis nidulans</B>) on a spruce(?) log near Dibuny, north-west from Saint Petersburg, Russia, <A HREF="../date-en/2021-05-05.htm">May 5, 2021</A>
LinkOrange mock oyster mushrooms (Phyllotopsis nidulans) on a spruce(?) log near Dibuny, north-west from Saint Petersburg, Russia, May 5, 2021
Location on mapsLeninskaya Tropa, Sankt-Peterburg, Russia, 197758

AI-generated summary of observations

Observations of Phyllotopsis nidulans in Leningrad Oblast and north-western Russia reveal its presence in various locations. The fungus was found on a thrown away wooden door in Lembolovo, as well as in Lisiy Nos, Sosnovka Park in Saint Petersburg, and Blizhnie Dubki area near Lisiy Nos. It grew on different types of wood, including birch and spruce logs. The mushrooms were observed at different times of the year, from August to May, with varying appearances, such as orange caps and bleached caps. The fungus was spotted in 2016, 2017, 2018, and 2021, indicating its consistent presence in the region. The observations suggest that Phyllotopsis nidulans is widely distributed in Leningrad Oblast and north-western Russia, and can thrive on different substrates and in various environments. Its growth was documented in both urban and natural areas.

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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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