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Fungi: Basidiomycota: Agaricomycetes: Agaricales: Tricholomataceae: Tricholoma saponaceum (Fr.) P. Kumm., 1871

Tricholoma saponaceum – Soapy knight

Synonyms: Agaricus atrovirens, Agaricus cnista, Agaricus fusiformis, Agaricus rapipes, Agaricus saponaceus, Gyrophila cnista, Gyrophila saponacea, Tricholoma atrovirens, Tricholoma boudieri, Tricholoma cnista, Tricholoma rapipes.

Common name: soapy knight.

Russian name: Ryadovka mylnaya.

Extract from Wikipedia article: Tricholoma saponaceum, also known as the soap-scented toadstool, soapy knight or soap tricholoma is an inedible mushroom found in woodlands in Europe and North America.

AI-generated description

Tricholoma saponaceum is a species of fungus that grows in association with coniferous trees, particularly spruce and pine. In St. Petersburg, Leningrad Oblast, and north-western Russia, it typically fruits from August to October in mossy spruce forests, often on acidic soils. The cap is 3-6 cm in diameter, convex to flat, and ranges in color from grey-brown to dark brown, with a soapy or foetid odor. The stem is 3-7 cm tall, cylindrical, and white to light brown. This fungus is considered edible but of poor quality due to its unpleasant smell and taste.

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

Soapy knight mushrooms (<B>Tricholoma saponaceum</B> var. squamosum) between Orekhovo and Lembolovo, north from Saint Petersburg. Russia, <A HREF="../date-en/2016-09-28.htm">September 28, 2016</A>
LinkSoapy knight mushrooms (Tricholoma saponaceum var. squamosum) between Orekhovo and Lembolovo, north from Saint Petersburg. Russia, September 28, 2016
Location on mapsUnnamed Road, Leningradskaya oblast', Russia
Small soapy knight mushrooms (<B>Tricholoma saponaceum</B> var. squamosum) between Orekhovo and Lembolovo, north from Saint Petersburg. Russia, <A HREF="../date-en/2016-09-28.htm">September 28, 2016</A>
LinkSmall soapy knight mushrooms (Tricholoma saponaceum var. squamosum) between Orekhovo and Lembolovo, north from Saint Petersburg. Russia, September 28, 2016
Location on mapsUnnamed Road, Leningradskaya oblast', Russia
Soapy knight mushrooms (<B>Tricholoma saponaceum</B>) between Orekhovo and Lembolovo, north from Saint Petersburg. Russia, <A HREF="../date-en/2016-09-28.htm">September 28, 2016</A>
LinkSoapy knight mushrooms (Tricholoma saponaceum) between Orekhovo and Lembolovo, north from Saint Petersburg. Russia, September 28, 2016
Location on mapsUnnamed Road, Leningradskaya oblast', Russia
Group of soapy knight mushrooms (<B>Tricholoma saponaceum</B>) between Orekhovo and Lembolovo, north from Saint Petersburg. Russia, <A HREF="../date-en/2016-09-28.htm">September 28, 2016</A>
LinkGroup of soapy knight mushrooms (Tricholoma saponaceum) between Orekhovo and Lembolovo, north from Saint Petersburg. Russia, September 28, 2016
Location on mapsUnnamed Road, Leningradskaya oblast', Russia
Young soapy knight mushrooms (<B>Tricholoma saponaceum</B>) in a pine forest in Posiolok near Vyritsa, 50 miles south from Saint Petersburg. Russia, <A HREF="../date-en/2017-09-29.htm">September 29, 2017</A>
LinkYoung soapy knight mushrooms (Tricholoma saponaceum) in a pine forest in Posiolok near Vyritsa, 50 miles south from Saint Petersburg. Russia, September 29, 2017
Location on mapsUnnamed Road, Vyritsa, Leningradskaya oblast', Russia, 188381

AI-generated summary of observations

Observations of Tricholoma saponaceum in Leningrad Oblast and north-western Russia reveal that the fungus grows in various locations. Between Orekhovo and Lembolovo, north of Saint Petersburg, soapy knight mushrooms were found on September 28, 2016, with variations in size, including small and larger specimens. The same location yielded groups of the fungus. In a pine forest near Vyritsa, 50 miles south of Saint Petersburg, young soapy knight mushrooms were observed on September 29, 2017. The species was also found in this region, indicating its presence in different areas of Leningrad Oblast. The observations suggest that Tricholoma saponaceum can thrive in various environments within the region. The fungus appears to grow in both smaller and larger groups, and can be found at different stages of development.

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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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