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Fungi: Basidiomycota: Agaricomycetes: Agaricales: Tricholomataceae: Collybia cirrhata (Schumach.) Quél., 1872

Collybia cirrhata – Piggyback shanklet

Synonyms: Agaricus amanitae, Agaricus cirrhatus, Agaricus ocellatus, Agaricus pallor, Agaricus tuberosus, Collybia amanitae, Collybia cirrata, Collybia ocellata, Lactarius ocellata, Microcollybia cirrhata, Sclerotium truncorum.

Common name: piggyback shanklet.

Russian name: Kollibiya kudryavaya.

Extract from Wikipedia article: Collybia cirrhata is a species of fungus in the Tricholomataceae family of the Agaricales order (gilled mushrooms). The species was first described in the scientific literature in 1786, but not validly named until 1803. Found in Europe, Northern Eurasia, and North America, it is known from temperate, boreal, and alpine or arctic habitats. It is a saprobic species that grows in clusters on the decaying or blackened remains of other mushrooms. The fruit bodies are small, with whitish convex to flattened caps up to 11 mm (0.43 in) in diameter, narrow white gills, and slender whitish stems 8–25 mm (0.3–1.0 in) long and up to 2 mm (0.08 in) thick. C. cirrhata can be distinguished from the other two members of Collybia by the absence of a sclerotium at the base of the stem. The mushroom, although not poisonous, is considered inedible because of its insubstantial size.

AI-generated description

Collybia cirrhata is a small to medium-sized agaric fungus with a bell-shaped to convex cap, typically 1-4 cm in diameter, and a slender stem, often with white to pale yellow fibrils. In St. Petersburg, Leningrad Oblast, and north-western Russia, it has been found growing in coniferous and mixed forests, often associated with mosses and lichens, particularly on acidic soils. Fruiting bodies typically appear from July to October, with a peak in August and September. The fungus is considered rare to occasional in the region, with scattered records from various localities, including the outskirts of St. Petersburg and nearby nature reserves.

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

<B>Collybia cirrhata</B>(?) mushrooms on a decomposed cap of another mushroom in Orekhovo, north from Saint Petersburg. Russia, <A HREF="../date-en/2016-08-17.htm">August 17, 2016</A>
LinkCollybia cirrhata(?) mushrooms on a decomposed cap of another mushroom in Orekhovo, north from Saint Petersburg. Russia, August 17, 2016
Location on mapsUnnamed Road, Vaskelovo, Leningradskaya oblast', Russia, 188731
<B>Collybia cirrhata</B>(?) mushrooms growing on a decomposed cap of another mushroom in Orekhovo, north from Saint Petersburg. Russia, <A HREF="../date-en/2016-08-17.htm">August 17, 2016</A>
LinkCollybia cirrhata(?) mushrooms growing on a decomposed cap of another mushroom in Orekhovo, north from Saint Petersburg. Russia, August 17, 2016
<B>Collybia cirrhata</B>(?) mushrooms near Orekhovo, north from Saint Petersburg. Russia, <A HREF="../date-en/2016-08-19.htm">August 19, 2016</A>
LinkCollybia cirrhata(?) mushrooms near Orekhovo, north from Saint Petersburg. Russia, August 19, 2016
Location on mapsUnnamed Road, Leningradskaya oblast', Russia
<B>Collybia cirrhata</B>(?) mushrooms growing on a decomposed cap of another mushroom near Orekhovo, north from Saint Petersburg. Russia, <A HREF="../date-en/2016-08-19.htm">August 19, 2016</A>
LinkCollybia cirrhata(?) mushrooms growing on a decomposed cap of another mushroom near Orekhovo, north from Saint Petersburg. Russia, August 19, 2016
Location on mapsUnnamed Road, Leningradskaya oblast', Russia
<B>Collybia cirrhata</B> mushrooms near Dibuny, north-west from Saint Petersburg, Russia, <A HREF="../date-en/2016-08-24.htm">August 24, 2016</A>
LinkCollybia cirrhata mushrooms near Dibuny, north-west from Saint Petersburg, Russia, August 24, 2016
<B>Collybia cirrhata</B> mushrooms on a rotten cap of a mushroom near Dibuny, north-west from Saint Petersburg, Russia, <A HREF="../date-en/2016-08-24.htm">August 24, 2016</A>
LinkCollybia cirrhata mushrooms on a rotten cap of a mushroom near Dibuny, north-west from Saint Petersburg, Russia, August 24, 2016
<B>Collybia cirrhata</B> mushrooms near Dibuny, west from Saint Petersburg. Russia, <A HREF="../date-en/2016-09-07.htm">September 7, 2016</A>
LinkCollybia cirrhata mushrooms near Dibuny, west from Saint Petersburg. Russia, September 7, 2016
Location on mapsUnnamed Road, Pesochnyy, g. Sankt-Peterburg, Russia
Piggyback shanklet mushrooms (<B>Collybia cirrhata</B>) north from Lembolovo, 40 miles north from Saint Petersburg. Russia, <A HREF="../date-en/2017-09-09.htm">September 9, 2017</A>
LinkPiggyback shanklet mushrooms (Collybia cirrhata) north from Lembolovo, 40 miles north from Saint Petersburg. Russia, September 9, 2017
Location on mapsUnnamed Road, Leningradskaya oblast', Russia, 188695
Close up of piggyback shanklet mushrooms (<B>Collybia cirrhata</B>) north from Lembolovo, 40 miles north from Saint Petersburg. Russia, <A HREF="../date-en/2017-09-09.htm">September 9, 2017</A>
LinkClose up of piggyback shanklet mushrooms (Collybia cirrhata) north from Lembolovo, 40 miles north from Saint Petersburg. Russia, September 9, 2017
Location on mapsUnnamed Road, Leningradskaya oblast', Russia, 188695
Piggyback shanklet mushrooms (<B>Collybia cirrhata</B>) on a rotten milkcap or Russula north from Lembolovo, 40 miles north from Saint Petersburg. Russia, <A HREF="../date-en/2017-09-09.htm">September 9, 2017</A>
LinkPiggyback shanklet mushrooms (Collybia cirrhata) on a rotten milkcap or Russula north from Lembolovo, 40 miles north from Saint Petersburg. Russia, September 9, 2017
Location on mapsUnnamed Road, Leningradskaya oblast', Russia
Piggyback shanklet mushrooms (<B>Collybia cirrhata</B>) on a rotten Russula near Orekhovo, 45 miles north from Saint Petersburg. Russia, <A HREF="../date-en/2017-09-09.htm">September 9, 2017</A>
LinkPiggyback shanklet mushrooms (Collybia cirrhata) on a rotten Russula near Orekhovo, 45 miles north from Saint Petersburg. Russia, September 9, 2017
Location on mapsUnnamed Road, Leningradskaya oblast', Russia
Piggyback shanklet mushrooms (<B>Collybia cirrhata</B>) near Orekhovo, 45 miles north from Saint Petersburg. Russia, <A HREF="../date-en/2017-09-09.htm">September 9, 2017</A>
LinkPiggyback shanklet mushrooms (Collybia cirrhata) near Orekhovo, 45 miles north from Saint Petersburg. Russia, September 9, 2017
Location on mapsUnnamed Road, Leningradskaya oblast', Russia
Piggyback shanklet (<B>Collybia cirrhata</B>) mushrooms on wood litter on a forest cutting near Dibuny, north-west from Saint Petersburg. Russia, <A HREF="../date-en/2017-09-18.htm">September 18, 2017</A>
LinkPiggyback shanklet (Collybia cirrhata) mushrooms on wood litter on a forest cutting near Dibuny, north-west from Saint Petersburg. Russia, September 18, 2017
Location on mapsBeloostrovskoye Shosse, 1, Pesochny, Sankt-Peterburg, Russia, 197758
<B>Collybia cirrhata</B>(?) mushrooms growing on a decomposed cap of another mushroom near Lisiy Nos, west from Saint Petersburg. Russia, <A HREF="../date-en/2018-09-06.htm">September 6, 2018</A>
LinkCollybia cirrhata(?) mushrooms growing on a decomposed cap of another mushroom near Lisiy Nos, west from Saint Petersburg. Russia, September 6, 2018

AI-generated summary of observations

Collybia cirrhata was observed in various locations in Leningrad Oblast and north-western Russia, often growing on decomposed caps of other mushrooms or on rotten wood litter. In Orekhovo, north of Saint Petersburg, the fungus was found on August 17 and 19, 2016, and again on September 9, 2017. Similar observations were made near Dibuny, west of Saint Petersburg, on August 24, 2016, and September 7, 2016. The fungus was also spotted north of Lembolovo, 40 miles north of Saint Petersburg, on September 9, 2017, and near Lisiy Nos, west of Saint Petersburg, on September 6, 2018. In many cases, Collybia cirrhata was found growing on the decomposed remains of other mushrooms, such as milkcaps or Russula species. The observations suggest that the fungus is widely distributed in the region and can thrive in various environments.

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Acknowledgements

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

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