Snowy oysterling mushrooms (Cheimonophyllum candidissimum) in aspen forest near Dibuny, north-west from Saint Petersburg. Russia, August 6, 2017Synonyms: Agaricus candidissimus, Dendrosarcus candidissimus, Geopetalum candidissimum, Nothopanus candidissimus, Pleurotellus candidissimus, Pleurotus candidissimus.
Common name: snowy oysterling.
Russian names: Kheymonofillum beleyshiy, Kheymonofillum chisteyshiy.
Cheimonophyllum candidissimum is a rare, white, waxy-capped fungus that grows on decaying wood. In St. Petersburg, Leningrad Oblast, and north-western Russia, it has been found in moist, temperate forests, often associated with spruce and birch trees. Records from this region indicate it typically fruits in late summer to early autumn, preferring shaded, humid areas with abundant woody debris.
Snowy oysterling mushrooms (Cheimonophyllum candidissimum) in aspen forest near Dibuny, north-west from Saint Petersburg. Russia, August 6, 2017
Small snowy oysterling mushrooms (Cheimonophyllum candidissimum) near Dibuny, north-west from Saint Petersburg. Russia, August 6, 2017
Details of snowy oysterling mushrooms (Cheimonophyllum candidissimum) on a log near Dibuny, north-west from Saint Petersburg. Russia, August 6, 2017
Snowy oysterling mushrooms (Cheimonophyllum candidissimum) on a lower side of a fallen willow near Kuzmolovo, north from Saint Petersburg. Russia, September 3, 2017
Snowy oysterling mushroom (Cheimonophyllum candidissimum) on an underside of a fallen willow near Kuzmolovo, north from Saint Petersburg. Russia, September 3, 2017
Snowy oysterling mushrooms (Cheimonophyllum candidissimum) on a lower surface of a fallen tree branch near Kuzmolovo, north from Saint Petersburg. Russia, September 24, 2017
Snowy oysterling (Cheimonophyllum candidissimum) on a thick barkless log near the gulf in lower Sergievka Park. Old Peterhof, west from Saint Petersburg, Russia, May 19, 2021In Leningrad Oblast and north-western Russia, Cheimonophyllum candidissimum was observed growing in various locations. The fungus was found in an aspen forest near Dibuny, where it formed small to large clusters on the ground and on logs. It also grew on fallen willow trees near Kuzmolovo, often on the lower side or underside of the trunks. Additionally, it was spotted on a fallen tree branch and a thick barkless log in other locations, including Sergievka Park in Old Peterhof. The observations were made during different times of the year, including August, September, and May, suggesting that the fungus can fruit throughout the growing season. The substrate varied, but often included deciduous trees such as aspen and willow. Overall, Cheimonophyllum candidissimum appears to be a relatively common species in the region, found in a variety of habitats and on different types of substrates.
Russian web-forums Planeta Gribov, V Kontakte, and Griby Sredney Polosy for learning names of local mushrooms.
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