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Fungi: Basidiomycota: Agaricomycetes: Agaricales: Marasmiaceae: Marasmius oreades (Bolton) Fr., 1836

Marasmius oreades – Fairy ring champignon

Synonyms: Agaricus coriaceus, Agaricus oreades, Agaricus pratensis, Agaricus pseudomouceron, Chamaeceras albidus, Collybia oreades, Gymnopus pratensis, Scorteus oreades.

Common name: fairy ring champignon.

Russian names: Openok lugovoy, Negniiuchnik lugovoy, Marasmius lugovoy, Lugovik, Gvozdichnyy grib.

Extract from Wikipedia article: Marasmius oreades, the Scotch bonnet, is also known as the fairy ring mushroom or fairy ring champignon. The latter names tend to cause some confusion, as many other mushrooms grow in fairy rings (such as the edible Agaricus campestris, the poisonous Chlorophyllum molybdites, and many others).

AI-generated description

Marasmius oreades is a small to medium-sized agaric fungus with a bell-shaped to convex cap, typically 1-4 cm in diameter, ranging in color from light brown to tan. It has a slender stem and gills that are narrowly attached to the stem. In St. Petersburg, Leningrad Oblast, and north-western Russia, Marasmius oreades is commonly found in lawns, meadows, and other grassy areas, often forming fairy rings. Fruiting typically occurs from June to September, with a peak in July and August. The fungus is widespread in the region, preferring moist, fertile soils and full sun to partial shade. It is considered edible and is sometimes collected for food, but should be identified with caution to avoid confusion with similar species.

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

Scotch bonnet mushrooms (<B>Marasmius oreades</B>) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, <A HREF="../date-en/2016-08-14.htm">August 14, 2016</A>
LinkScotch bonnet mushrooms (Marasmius oreades) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, August 14, 2016
Location on mapsul. Professora Popova, 1/6, Sankt-Peterburg, Russia, 197022
Scotch bonnet mushrooms (<B>Marasmius oreades</B>) in Sosnovka Park. Saint Petersburg, Russia, <A HREF="../date-en/2016-08-16.htm">August 16, 2016</A>
LinkScotch bonnet mushrooms (Marasmius oreades) in Sosnovka Park. Saint Petersburg, Russia, August 16, 2016
Location on mapsSvetlanovskiy pr., 49, Sankt-Peterburg, Russia
Fairy ring champignon mushrooms (<B>Marasmius oreades</B>) on a lawn near a pond on Svetlanovsky Prospect. Saint Petersburg, Russia, <A HREF="../date-en/2017-07-24.htm">July 24, 2017</A>
LinkFairy ring champignon mushrooms (Marasmius oreades) on a lawn near a pond on Svetlanovsky Prospect. Saint Petersburg, Russia, July 24, 2017
Location on mapsSvetlanovskiy pr., 49к2, Sankt-Peterburg, Russia, 194064
Fairy ring champignon mushrooms (<B>Marasmius oreades</B>) on a sandy lawn near Olginsky Pond on Svetlanovsky Prospect. Saint Petersburg, Russia, <A HREF="../date-en/2017-07-24.htm">July 24, 2017</A>
LinkFairy ring champignon mushrooms (Marasmius oreades) on a sandy lawn near Olginsky Pond on Svetlanovsky Prospect. Saint Petersburg, Russia, July 24, 2017
Location on mapsSvetlanovskiy pr., 49к2, Sankt-Peterburg, Russia, 194064
Scotch bonnet mushrooms (<B>Marasmius oreades</B>) on roadside in West Kotlin Nature Reserve in Kronstadt. Saint Petersburg, Russia, <A HREF="../date-en/2018-09-02.htm">September 2, 2018</A>
LinkScotch bonnet mushrooms (Marasmius oreades) on roadside in West Kotlin Nature Reserve in Kronstadt. Saint Petersburg, Russia, September 2, 2018
Location on mapsKronshtadtskoye Shosse, Kronshtadt, Sankt-Peterburg, Russia, 197761
Half-dry fairy ring champignon mushrooms (<B>Marasmius oreades</B>) on a lawn in Gardens of Polytechnic Institute. Saint Petersburg, Russia, <A HREF="../date-en/2024-07-23.htm">July 23, 2024</A>
LinkHalf-dry fairy ring champignon mushrooms (Marasmius oreades) on a lawn in Gardens of Polytechnic Institute. Saint Petersburg, Russia, July 23, 2024
Fairy ring champignon mushrooms (<B>Marasmius oreades</B>) on a lawn near Svetlanovsky Prospekt. Saint Petersburg, Russia, <A HREF="../date-en/2024-08-12.htm">August 12, 2024</A>
LinkFairy ring champignon mushrooms (Marasmius oreades) on a lawn near Svetlanovsky Prospekt. Saint Petersburg, Russia, August 12, 2024

AI-generated summary of observations

Observations of Marasmius oreades in Leningrad Oblast and north-western Russia revealed the fungus grows in various locations, including botanic gardens, parks, and lawns. In Saint Petersburg, it was found in the Botanic Gardens of Komarov Botanical Institute, Sosnovka Park, and on lawns near ponds on Svetlanovsky Prospect. The fungus also grew on a roadside in West Kotlin Nature Reserve in Kronstadt and in the Gardens of Polytechnic Institute. Multiple observations were made over several years, including 2016, 2017, 2018, and 2024, indicating its persistent presence in the region. The mushrooms often formed fairy rings, and their condition varied from fresh to half-dry, depending on the time of observation. Overall, Marasmius oreades appears to be a common species in urban and natural areas of Leningrad Oblast and north-western Russia.

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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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