Yellow cup mushrooms Pulvinula carbonaria with moss on a bonfire site west from Kavgolovo Lake near Toksovo, north from Saint Petersburg. Russia, August 21, 2018
Leningrad Oblast, Russia, 188667Synonyms: Barlaea carbonaria, Barlaeina carbonaria, Crouania carbonaria, Lamprospora carbonaria, Octospora carbonaria.
Pulvinula carbonaria is a small, disc-shaped fungus that grows on burnt soil, charcoal, and ash. In St. Petersburg, Leningrad Oblast, and north-western Russia, it has been found in areas with rich organic matter, such as forest edges, clearings, and along roadsides. The fungus typically fruits in summer and early autumn, producing yellow to orange apothecia with a powdery exterior and a smooth, waxy interior. It is considered a rare species in the region, but can be locally abundant in areas with suitable substrate.
Yellow cup mushrooms Pulvinula carbonaria with moss on a bonfire site west from Kavgolovo Lake near Toksovo, north from Saint Petersburg. Russia, August 21, 2018Leningrad Oblast, Russia, 188667Observations of Pulvinula carbonaria in Leningrad Oblast and north-western Russia reveal specific habitat preferences. The fungus has been found growing on bonfire sites, such as the one west of Kavgolovo Lake near Toksovo, where it was observed on August 21, 2018. At this location, yellow cup mushrooms were seen growing amidst moss, indicating a tolerance for disturbed and potentially nutrient-poor environments. This observation suggests that Pulvinula carbonaria can thrive in areas with limited vegetation and high levels of disturbance, such as bonfire sites. The presence of moss at the site may also indicate a level of stabilization and recovery of the habitat, allowing the fungus to colonize and grow. Further observations are needed to fully understand the ecological preferences of this species in the region. The discovery highlights the adaptability of Pulvinula carbonaria in north-western Russia's ecosystems.
Russian web-forums Planeta Gribov, V Kontakte, and Griby Sredney Polosy for learning names of local mushrooms.
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