Omphaloid mushrooms Hydropus marginellus on a mossy birch log on an old railroad path in Kuzmolovo, north from Saint Petersburg. Russia, July 26, 2017
Unnamed Road, Leningradskaya oblast', Russia, 188663Synonyms: Agaricus marginellus, Mycena marginella, Omphalia marginella, Omphalina marginella.
Russian name: Gidropus okaymlennyy.
Hydropus marginellus is a small to medium-sized agaric fungus with a bell-shaped to convex cap, typically 1-4 cm in diameter, grayish-brown to brown in color, and a distinctive marginal rim. It has a slender stipe and gills that are narrowly attached to the stipe. In St. Petersburg, Leningrad Oblast, and north-western Russia, Hydropus marginellus is found in coniferous and mixed forests, often growing on mossy soil, rotten wood, or among low vegetation. Fruiting bodies typically appear in summer to early autumn.
Omphaloid mushrooms Hydropus marginellus on a mossy birch log on an old railroad path in Kuzmolovo, north from Saint Petersburg. Russia, July 26, 2017Unnamed Road, Leningradskaya oblast', Russia, 188663The fungus Hydropus marginellus was observed growing on a mossy birch log in Kuzmolovo, Leningrad Oblast, on July 26, 2017. The mushrooms were found on an old railroad path, indicating that the species can thrive in disturbed or altered environments. The substrate of moss-covered birch wood suggests that Hydropus marginellus is a saprotrophic fungus, obtaining its nutrients from decaying organic matter. The observation was made in late July, which may indicate that the species fruits during the summer months in north-western Russia. Further observations are needed to fully understand the ecological preferences and distribution of Hydropus marginellus in this region. Additional records from Leningrad Oblast and surrounding areas could provide valuable insights into the biology and ecology of this fungus. The discovery highlights the diversity of fungal species in the region.
Russian web-forums Planeta Gribov, V Kontakte, and Griby Sredney Polosy for learning names of local mushrooms.
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