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Fungi: Basidiomycota: Agaricomycetes: Russulales: Russulaceae: Lactarius acerrimus Britzelm., 1893

Lactarius acerrimus – Twospored milkcap

Synonyms: Lactarius insulsus, Lactifluus acerrimus.

Common names: twospored milkcap, two spored milkcap.

Russian name: Mlechnik ostreyshiy.

AI-generated description

Lactarius acerrimus is a milk-cap 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 July to October in moist, acidic soils. The cap is 3-8 cm in diameter, convex to flat, and reddish-brown to chestnut-colored with a velvety texture. The gills are crowded, cream-colored, and produce a white, acrid milk that discolors brownish when exposed to air. The stem is 3-6 cm long, cylindrical, and concolorous with the cap. The fungus is considered edible but of poor quality due to its bitter taste and potential gastrointestinal side effects if not cooked properly. It is relatively common in the region's coniferous forests, including those in the vicinity of St. Petersburg and Leningrad Oblast.

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

Twospored milkcap mushrooms (<B>Lactarius acerrimus</B>) near Dibuny, north-west from Saint Petersburg, Russia, <A HREF="../date-en/2016-08-24.htm">August 24, 2016</A>
LinkTwospored milkcap mushrooms (Lactarius acerrimus) near Dibuny, north-west from Saint Petersburg, Russia, August 24, 2016

AI-generated summary of observations

The fungus Lactarius acerrimus was observed in the Leningrad Oblast and north-western Russia, specifically near Dibuny, northwest of Saint Petersburg. On August 24, 2016, twospored milkcap mushrooms were found in this region. The observation suggests that Lactarius acerrimus is present in the area, potentially indicating a suitable habitat for the species. The specific location and date provide valuable information on the distribution and temporal patterns of the fungus. Further observations in the region may reveal more about the ecology and behavior of Lactarius acerrimus in north-western Russia. The discovery of this species in the area contributes to a better understanding of the local mycological diversity. Additional studies can help determine the frequency and abundance of Lactarius acerrimus in the region, as well as its interactions with other organisms. This information can inform conservation efforts and habitat management strategies.

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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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