Synonyms: Agaricus cerinus, Agaricus chrysenteron, Calocybe cerina, Calocybe chrysenteron, Gyrophila chrysenteron, Lyophyllum chrysenteron, Rugosomyces cerinus, Tricholoma cerinum, Tricholoma chrysenteron.
Common name: yellow domecap.
Russian name: Kalotsibe zolotistaya.
Rugosomyces chrysenteron is a species of fungus in the family Lyophyllaceae. In St. Petersburg and Leningrad Oblast, it has been found growing on decaying wood and forest litter. Records from north-western Russia indicate that the fungus typically fruits in late summer to early autumn, forming clusters of small to medium-sized, yellowish-brown caps with wavy or wrinkled surfaces. Local collections often feature specimens with a strong, sweet or earthy odor.
Observations of the fungus Rugosomyces chrysenteron were made in two locations: near Kavgolovskoe Lake in Toksovo and in Sosnovka Park, both in north-western Russia. In Toksovo, golden mushrooms were spotted on August 2, 2016, while in Sosnovka Park, Saint Petersburg, they were observed on August 12, 2016. The species was identified as Rugosomyces chrysenteron, although it was also referred to as Calocybe chrysenteron, suggesting a possible synonymy or reclassification. These sightings indicate that the fungus is present in the Leningrad Oblast region, specifically in areas with likely suitable habitats such as lakes and parks. The observations were made during the summer month of August, which may be a peak time for the fungus's growth and fruiting.
Russian web-forums Planeta Gribov, V Kontakte, and Griby Sredney Polosy for learning names of local mushrooms.
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