Synonyms: Agaricus nanus, Pluteus griseopus.
Common name: dwarf shield.
Russian name: Pliutey karlikovyy.
Pluteus nanus is a small to minute-sized fungus that grows on decaying wood, moss, and other organic matter. In St. Petersburg, Leningrad Oblast, and north-western Russia, it has been found in various habitats, including urban parks, forests, and wetlands. The species typically fruits from summer to autumn, producing small, bell-shaped caps that are 0.5-2 cm in diameter, with a pale brown to grayish-brown color. The stipe is slender and cylindrical, often curved or twisted. Pluteus nanus is considered a rare but widespread species in the region, with records from multiple locations, including the surroundings of St. Petersburg and the Leningrad Oblast.
Observations of the fungus Pluteus nanus in Leningrad Oblast and north-western Russia reveal its presence in wet forest environments. In Sosnovka Park, Saint Petersburg, small mushrooms were found on July 20, 2017. Similarly, in Pavlovsk Park, a suburb of Saint Petersburg, small mushrooms were observed in the area of New Sylvia on September 8, 2018. The mushrooms were identified as Pluteus nanus, with some uncertainty noted in the Pavlovsk Park observations. The side view of the mushrooms in Pavlovsk Park was also documented, providing further insight into their morphology. These sightings suggest that Pluteus nanus can be found in the region's wet forests during the summer and early fall months. The species appears to thrive in these environments, with multiple observations recorded in the area.
Russian web-forums Planeta Gribov, V Kontakte, and Griby Sredney Polosy for learning names of local mushrooms.
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