Synonyms: Agaricus granulosus, Armillaria granosa, Armillaria granulosa, Cystoderma granulosum, Lepiota granulosa, Mastocephalus granulosus.
Russian name: Tsistoderma zernistaya.
Cystodermella granulosa is a small to medium-sized fungus with a granular to verrucose cap, typically 1-4 cm in diameter, and a slender stem. In St. Petersburg, Leningrad Oblast, and north-western Russia, it has been found growing on mosses, grasses, and other herbaceous plants, often in wet meadows, forests, and along streams. Fruitings typically occur from late summer to early autumn, with a preference for acidic to neutral soils. The species is considered rare to occasional in the region, with scattered records from various localities.
Mushrooms of Cystodermella granulosa were observed near Dibuny, northwest of Saint Petersburg, on September 28, 2017. The species was found to be growing in a moist, wooded area with abundant undergrowth. The caps of the mushrooms were small, ranging from 1-3 cm in diameter, and were covered in fine, granular warts. The stems were slender and elongated, typically between 2-5 cm long. The gills were crowded and free from the stem, with a white to cream-colored spore print. The fungus was found to be associated with coniferous trees, particularly spruce and pine, in this region of Leningrad Oblast and north-western Russia. Further observations are needed to fully understand the distribution and habitat preferences of Cystodermella granulosa in this area. Additional collections from nearby locations may provide more insight into its ecological role.
Russian web-forums Planeta Gribov, V Kontakte, and Griby Sredney Polosy for learning names of local mushrooms.
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