Brown-rot fungus Rhodonia placenta on underside of a fallen spruce near Chornoe Lake north from Komarovo, 20 miles north-west from Saint Petersburg. Russia, May 22, 2019
Unnamed Road, RussiaSynonyms: Bjerkandera roseomaculata, Boletus incarnatus, Caloporia incarnata, Caloporus incarnatus, Ceriporia incarnata, Ceriporiopsis placenta, Leptoporus placenta, Oligoporus placenta, Physisporus albolilacinus, Physisporus incarnatus, Physisporus placenta, Polyporus incarnatus, Polyporus placenta, Polyporus roseomaculatus, Poria albolilacina, Poria carnicolor, Poria incarnata, Poria microspora, Poria monticola, Poria placenta, Postia placenta, Tyromyces placentus.
Common name: pink pancake crust.
Russian name: Rodoniya rasplastannaya.
Extract from Wikipedia article: Rhodonia is a fungal genus in the family Fomitopsidaceae. It is a monotypic genus, containing the single crust fungus Rhodonia placenta. A brown rot species, R. placenta is found in China, Europe, and North America, where it grows on decaying conifer wood.
Rhodonia placenta is a rare, crust-forming fungus that grows on dead wood. In St. Petersburg, Leningrad Oblast, and north-western Russia, it has been found in old-growth forests, particularly in areas with high humidity and rich soil. The fungus typically forms small, wavy or wrinkled crusts that are pinkish-brown to reddish-brown in color, often with a distinctive white or yellowish margin. It is considered a rare and locally endangered species in the region due to habitat loss and degradation. Specimens have been collected from various tree species, including birch, aspen, and spruce, typically on decaying logs or stumps.
Brown-rot fungus Rhodonia placenta on underside of a fallen spruce near Chornoe Lake north from Komarovo, 20 miles north-west from Saint Petersburg. Russia, May 22, 2019Unnamed Road, Russia
Close up of brown-rot fungus Rhodonia placenta on underside of a fallen spruce near Chornoe Lake north from Komarovo, 20 miles north-west from Saint Petersburg. Russia, May 22, 2019Unnamed Road, Russia
Brown-rot fungus Rhodonia placenta on underside of a fallen spruce and on attached dry grass north from Komarovo, 20 miles north-west from Saint Petersburg. Russia, May 22, 2019Unnamed Road, Russia
Resupinate polypore mushroom Rhodonia placenta on underside of a fallen spruce in Zakhodskoe (Lounatjoki), 50 miles north from Saint Petersburg. Russia, May 15, 2021Unnamed Road, Leningradskaya oblast', Russia, 188861
Close-up of resupinate polypore mushroom Rhodonia placenta on underside of a fallen spruce in Zakhodskoe (Lounatjoki), 50 miles north from Saint Petersburg. Russia, May 15, 2021Unnamed Road, Leningradskaya oblast', Russia, 188861
Texture of resupinate polypore mushroom Rhodonia placenta on underside of a fallen spruce in Zakhodskoe (Lounatjoki), 50 miles north from Saint Petersburg. Russia, May 15, 2021Unnamed Road, Leningradskaya oblast', Russia, 188861
Pink polypore mushroom Rhodonia placenta on underside of a fallen spruce in Zakhodskoe (Lounatjoki), 50 miles north from Saint Petersburg. Russia, May 15, 2021Unnamed Road, Leningradskaya oblast', Russia, 188861Observations of the fungus Rhodonia placenta were made in Leningrad Oblast and north-western Russia. The fungus was found on the underside of fallen spruces near Chornoe Lake, approximately 20 miles north-west from Saint Petersburg, and in Zakhodskoe, about 50 miles north from Saint Petersburg. It was observed growing not only on wood but also on attached dry grass. Close-up observations revealed the texture and color of the fungus, with some specimens displaying a pink hue. The fungus was identified as a resupinate polypore mushroom, characterized by its growth habit and appearance. Multiple sightings were recorded in May 2019 and May 2021, indicating the presence of Rhodonia placenta in the region during this time period. The observations provide insight into the habitat and growth patterns of this fungus in north-western Russia.
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