Small mushrooms Arrhenia sphagnicola in sphagnum moss near Orekhovo, north from Saint Petersburg. Russia, June 24, 2017
Unnamed Road, Orekhovo, Leningradskaya oblast', Russia, 188731Synonyms: Agaricus sphagnicola, Clitocybe sphagnicola, Omphalia sphagnicola, Omphalina sphagnicola.
Common name: sphagnum navel.
Russian name: Arreniya (Omfalina) sfagnovaya.
Arrhenia sphagnicola is a species of fungus that grows on sphagnum mosses. In St. Petersburg, Leningrad Oblast, and north-western Russia, it has been found in bogs, marshes, and wet meadows, typically thriving in acidic, humid environments with abundant sphagnum. The fungus produces small to medium-sized, funnel-shaped or wavy caps that are yellowish-brown to brown in color, with a wrinkled or veined surface. Fruitings often occur from late summer to early fall.
Small mushrooms Arrhenia sphagnicola in sphagnum moss near Orekhovo, north from Saint Petersburg. Russia, June 24, 2017Unnamed Road, Orekhovo, Leningradskaya oblast', Russia, 188731
Small mushrooms Arrhenia sphagnicola in sphagnum swamp near Orekhovo, north from Saint Petersburg. Russia, June 24, 2017Unnamed Road, Orekhovo, Leningradskaya oblast', Russia, 188731
Small mushrooms Arrhenia sphagnicola taken from a swamp near Orekhovo, north from Saint Petersburg. Russia, June 24, 2017pr. Raevskogo, 24, Sankt-Peterburg, Russia, 194064
Omphaloid mushrooms Arrhenia sphagnicola in moss in Boloto Lammin-Suo swamp reserve. Zelenogorsk near Saint Petersburg, Russia, July 8, 2017
Small omphaloid mushrooms Arrhenia sphagnicola in marsh in Boloto Lammin-Suo swamp reserve. Zelenogorsk near Saint Petersburg, Russia, July 8, 2017
Mushrooms Arrhenia sphagnicola taken from marsh of Boloto Lammin-Suo swamp reserve. Zelenogorsk near Saint Petersburg, Russia, July 8, 2017
Mushrooms Arrhenia sphagnicola in sphagnum moss near Orekhovo, 45 miles north from Saint Petersburg. Russia, August 30, 2018Unnamed Road, Vaskelovo, Leningradskaya oblast', Russia, 188731
Gills of mushrooms Arrhenia sphagnicola near Orekhovo, 45 miles north from Saint Petersburg. Russia, August 30, 2018Unnamed Road, Vaskelovo, Leningradskaya oblast', Russia, 188731
Mushroom Arrhenia sphagnicola in sphagnum moss near Orekhovo, north from Saint Petersburg. Russia, August 1, 2024Куйвозовское сельское поселение, Всеволожский район, Ленинградская область, Северо-Западный федеральный округ, Россия
Side view of a mushroom Arrhenia sphagnicola in sphagnum moss near Orekhovo, north from Saint Petersburg. Russia, August 1, 2024Куйвозовское сельское поселение, Всеволожский район, Ленинградская область, Северо-Западный федеральный округ, РоссияIn Leningrad Oblast and north-western Russia, observations of the fungus Arrhenia sphagnicola were made in various locations, including near Orekhovo and Zelenogorsk. The mushrooms were found growing in sphagnum moss and swamps, with sightings recorded on multiple dates between June 2017 and August 2024. The fungi were described as small and omphaloid, with observations of their gills and side views also noted. Specific locations included Boloto Lammin-Suo swamp reserve, where the mushrooms were found in marshes and moss. The consistent presence of Arrhenia sphagnicola in these areas suggests a preference for sphagnum-dominated habitats. Multiple photographs were taken to document the sightings, providing a record of the fungus's appearance and growth habits in this region. Observations were made by an observer who documented the species' presence over several years.
Russian web-forums Planeta Gribov, V Kontakte, and Griby Sredney Polosy for learning names of local mushrooms.
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