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Fungi: Basidiomycota: Agaricomycetes: Agaricales: Hymenogastraceae: Gymnopilus penetrans (Fr.) Murrill, 1912

Gymnopilus penetrans – Common rustgill

Synonyms: Agaricus hybridus, Agaricus penetrans, Dryophila penetrans, Flammula croceolamellata, Flammula hybrida, Flammula penetrans, Fulvidula hybrida, Fulvidula penetrans, Gymnopilus hybridus, Naucoria penetrans.

Common name: common rustgill.

Russian name: Gimnopil pronikaiushchiy.

Extract from Wikipedia article: Gymnopilus sapineus, commonly known as scaly rustgill, is a small and widely distributed mushroom which grows in dense clusters on dead conifer wood. It has a rusty orange spore print and a bitter taste. It is unclear at this time whether this species or its relatives contain the hallucinogen psilocybin.

AI-generated description

Gymnopilus penetrans is a species of mushroom-forming fungus that grows on coniferous trees, particularly spruce and pine. In St. Petersburg and Leningrad Oblast, it has been found in forests and parks, often fruiting from July to November. In north-western Russia, it is widely distributed and can be found in various habitats, including boreal forests and wooded areas. The fungus produces yellowish-brown to reddish-brown caps with a velvety texture and white to yellowish gills. It is considered an ectomycorrhizal fungus, forming symbiotic relationships with tree roots.

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

Common rustgill mushrooms (<B>Gymnopilus penetrans</B>)(?) on a log in Zakhodskoe, 50 miles north from Saint Petersburg. Russia, <A HREF="../date-en/2016-07-10.htm">July 10, 2016</A>
LinkCommon rustgill mushrooms (Gymnopilus penetrans)(?) on a log in Zakhodskoe, 50 miles north from Saint Petersburg. Russia, July 10, 2016
Location on mapsUnnamed Road, Zakhodskoye, Leningradskaya oblast', Russia, 188861
Common rustgill mushrooms (<B>Gymnopilus penetrans</B>) on rotten wood in Lisiy Nos, west from Saint Petersburg. Russia, <A HREF="../date-en/2016-10-09.htm">October 9, 2016</A>
LinkCommon rustgill mushrooms (Gymnopilus penetrans) on rotten wood in Lisiy Nos, west from Saint Petersburg. Russia, October 9, 2016
Location on mapsPrimorskoye sh., g. Sankt-Peterburg, Russia, 197755
Common rustgill mushrooms (<B>Gymnopilus penetrans</B>) in Sosnovka Park. Saint Petersburg, Russia, <A HREF="../date-en/2017-07-24.htm">July 24, 2017</A>
LinkCommon rustgill mushrooms (Gymnopilus penetrans) in Sosnovka Park. Saint Petersburg, Russia, July 24, 2017
Location on mapsSvetlanovskiy pr., 55, Sankt-Peterburg, Russia, 194064
Common rustgill mushrooms (<B>Gymnopilus penetrans</B>) in Kannelyarvi, 45 miles north from Saint Petersburg. Russia, <A HREF="../date-en/2017-08-11.htm">August 11, 2017</A>
LinkCommon rustgill mushrooms (Gymnopilus penetrans) in Kannelyarvi, 45 miles north from Saint Petersburg. Russia, August 11, 2017
Location on mapsUnnamed Road, Kannelyarvi, Leningradskaya oblast', Russia, 188850
Common rustgill mushrooms (<B>Gymnopilus penetrans</B>)(?) in Kannelyarvi, 45 miles north from Saint Petersburg. Russia, <A HREF="../date-en/2017-08-11.htm">August 11, 2017</A>
LinkCommon rustgill mushrooms (Gymnopilus penetrans)(?) in Kannelyarvi, 45 miles north from Saint Petersburg. Russia, August 11, 2017
Location on mapsUnnamed Road, Kannelyarvi, Leningradskaya oblast', Russia, 188850
Rustgill mushrooms <B>Gymnopilus penetrans</B>(?) near Lisiy Nos. West from Saint Petersburg, Russia, <A HREF="../date-en/2018-08-26.htm">August 26, 2018</A>
LinkRustgill mushrooms Gymnopilus penetrans(?) near Lisiy Nos. West from Saint Petersburg, Russia, August 26, 2018
Location on mapsPrimorskoye Shosse, Sankt-Peterburg, Russia, 197755

AI-generated summary of observations

In Leningrad Oblast and north-western Russia, observations of the fungus Gymnopilus penetrans have been recorded in various locations. The species was found on a log in Zakhodskoe, 50 miles north from Saint Petersburg, in July 2016. Similar sightings were reported on rotten wood in Lisiy Nos, west from Saint Petersburg, in October 2016. In Sosnovka Park, Saint Petersburg, the mushrooms were spotted in July 2017. Additional observations were made in Kannelyarvi, 45 miles north from Saint Petersburg, in August 2017, with possible sightings of the same species reported on the same day. Another possible sighting was recorded near Lisiy Nos in August 2018. The fungus appears to thrive on decaying wood in these regions, with observations spanning multiple years and locations. The consistency of these findings suggests that Gymnopilus penetrans is a relatively common species in this area.

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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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