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Fungi: Basidiomycota: Agaricomycetes: Polyporales: Meruliaceae: Flaviporus citrinellus (Niemelä & Ryvarden) Ginns, 1984

Flaviporus citrinellus

Synonym: Antrodiella citrinella.

Russian name: Flaviporus limonno-zhioltyy.

AI-generated description

Flaviporus citrinellus is a species of fungus that belongs to the family Polyporaceae. It is characterized by its bright yellow to orange-yellow pileus and stipe, with a size range of 2-8 cm in diameter. In St. Petersburg, Leningrad Oblast, and north-western Russia, Flaviporus citrinellus has been found growing on deciduous trees, particularly on birch and aspen, in late summer to early autumn. The fungus is relatively rare in the region, but can be locally abundant in areas with rich deciduous forests.

Photos of this mushroom from the area of St. Petersburg, Russia

Yellow polypore mushroom <B>Flaviporus citrinellus</B> (Antrodiella citrinella) on underside of a fallen spruce on a rotten red-belted bracket mushroom near Chornoe Lake north from Komarovo, 20 miles north-west from Saint Petersburg. Russia, <A HREF="../date-en/2019-05-22.htm">May 22, 2019</A>
LinkYellow polypore mushroom Flaviporus citrinellus (Antrodiella citrinella) on underside of a fallen spruce on a rotten red-belted bracket mushroom near Chornoe Lake north from Komarovo, 20 miles north-west from Saint Petersburg. Russia, May 22, 2019
Location on mapsUnnamed Road, Russia
Close up of polypore mushroom <B>Flaviporus citrinellus</B> (Antrodiella citrinella) on underside of a fallen spruce on a rotten red-belted bracket mushroom near Chornoe Lake north from Komarovo, 20 miles north-west from Saint Petersburg. Russia, <A HREF="../date-en/2019-05-22.htm">May 22, 2019</A>
LinkClose up of polypore mushroom Flaviporus citrinellus (Antrodiella citrinella) on underside of a fallen spruce on a rotten red-belted bracket mushroom near Chornoe Lake north from Komarovo, 20 miles north-west from Saint Petersburg. Russia, May 22, 2019
Location on mapsUnnamed Road, Russia
Yellow polypore mushroom <B>Flaviporus citrinellus</B> (Antrodiella citrinella) on underside of a fallen spruce and on a rotten red-belted bracket mushroom near Chornoe Lake north from Komarovo, 20 miles north-west from Saint Petersburg. Russia, <A HREF="../date-en/2019-05-22.htm">May 22, 2019</A>
LinkYellow polypore mushroom Flaviporus citrinellus (Antrodiella citrinella) on underside of a fallen spruce and on a rotten red-belted bracket mushroom near Chornoe Lake north from Komarovo, 20 miles north-west from Saint Petersburg. Russia, May 22, 2019
Location on mapsUnnamed Road, Russia
Spreading yellow polypore mushroom <B>Flaviporus citrinellus</B> (Antrodiella citrinella) on underside of a fallen spruce and on a rotten red-belted bracket mushroom near Chornoe Lake north from Komarovo, 20 miles north-west from Saint Petersburg. Russia, <A HREF="../date-en/2019-05-22.htm">May 22, 2019</A>
LinkSpreading yellow polypore mushroom Flaviporus citrinellus (Antrodiella citrinella) on underside of a fallen spruce and on a rotten red-belted bracket mushroom near Chornoe Lake north from Komarovo, 20 miles north-west from Saint Petersburg. Russia, May 22, 2019
Location on mapsUnnamed Road, Russia
Details of yellow polypore mushroom <B>Flaviporus citrinellus</B> (Antrodiella citrinella) on underside of a fallen spruce and on a rotten red-belted bracket mushroom near Chornoe Lake north from Komarovo, 20 miles north-west from Saint Petersburg. Russia, <A HREF="../date-en/2019-05-22.htm">May 22, 2019</A>
LinkDetails of yellow polypore mushroom Flaviporus citrinellus (Antrodiella citrinella) on underside of a fallen spruce and on a rotten red-belted bracket mushroom near Chornoe Lake north from Komarovo, 20 miles north-west from Saint Petersburg. Russia, May 22, 2019
Location on mapsUnnamed Road, Russia
Polypore mushroom <B>Flaviporus citrinellus</B> (Antrodiella citrinella) on underside of a fallen spruce near Chornoe Lake north from Komarovo, 20 miles north-west from Saint Petersburg. Russia, <A HREF="../date-en/2019-05-22.htm">May 22, 2019</A>
LinkPolypore mushroom Flaviporus citrinellus (Antrodiella citrinella) on underside of a fallen spruce near Chornoe Lake north from Komarovo, 20 miles north-west from Saint Petersburg. Russia, May 22, 2019
Location on mapsUnnamed Road, Russia

AI-generated summary of observations

Observations of the fungus Flaviporus citrinellus in Leningrad Oblast and north-western Russia reveal its growth on fallen spruce trees and rotten red-belted bracket mushrooms near Chornoe Lake. The mushroom was found on the underside of the spruce, often spreading onto adjacent surfaces. Close-up observations show the details of the fungus's texture and color. The yellow polypore mushroom was observed in various stages, including a close-up view of its pores and a shot of it spreading across the surface of the fallen tree. Additional observations highlight the fungus's growth on both the spruce and the rotten bracket mushroom, showcasing its ability to thrive in these environments. All observations were made on May 22, 2019, near Komarovo, 20 miles north-west from Saint Petersburg. The fungus appears to be thriving in this region, with multiple sightings documented.

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Links

Acknowledgements

Russian web-forums Planeta Gribov, V Kontakte, and Griby Sredney Polosy for learning names of local mushrooms.

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