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Fungi: Basidiomycota: Agaricomycetes: Russulales: Russulaceae: Lactarius vietus (Fr.) Fr., 1838

Lactarius vietus – Grey milkcap

Synonyms: Agaricus vietus, Galorrheus vietus, Lactarius paludestris, Lactifluus paludestris, Lactifluus vietus.

Common name: grey milkcap.

Russian name: Mlechnik bleklyy.

Extract from Wikipedia article: Lactarius vietus (commonly known as the grey milkcap) is a species of fungus in the family Russulaceae, first described by Elias Magnus Fries. It produces moderately sized and brittle mushrooms, which grow on the forest floor or on rotting wood. The flattened-convex cap can vary in shape, sometimes forming the shape of a wide funnel. It is typically grey, but the colour varies. The species has crowded, light-coloured gills, which produce white milk. The spore print is typically whitish, but also varies considerably. The mushrooms typically have a strong, acrid taste and have been described as inedible, but other authors have described them as consumable after boiling. L. vietus feeds by forming an ectomycorrhizal relationship with surrounding trees, and it favours birch. It grows in autumn months and is fairly common in Europe, North America and eastern Asia.

AI-generated description

Lactarius vietus is a small to medium-sized mushroom with a grey-brown cap and white gills. It grows in association with coniferous trees, particularly spruce. In St. Petersburg and Leningrad Oblast, it has been found in mixed forests and heathlands. In north-western Russia, it is relatively common in the regions of Karelia and Murmansk Oblast, where it fruits from July to September. The species is considered rare in some areas, but can be locally abundant in suitable habitats.

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

Grey milkcap mushrooms (<B>Lactarius vietus</B>)(?) in sphagnum moss in swampy area of Sosnovka Park. Saint Petersburg, Russia, <A HREF="../date-en/2013-09-15.htm">September 15, 2013</A>
LinkGrey milkcap mushrooms (Lactarius vietus)(?) in sphagnum moss in swampy area of Sosnovka Park. Saint Petersburg, Russia, September 15, 2013
Location on mapsUnnamed Road, Sankt-Peterburg, Russia, 194295
Pair of grey milkcap mushrooms (<B>Lactarius vietus</B>)(?) in sphagnum moss in swampy area of Sosnovka Park. Saint Petersburg, Russia, <A HREF="../date-en/2013-09-15.htm">September 15, 2013</A>
LinkPair of grey milkcap mushrooms (Lactarius vietus)(?) in sphagnum moss in swampy area of Sosnovka Park. Saint Petersburg, Russia, September 15, 2013
Location on mapsListvennaya ulitsa, Saint Petersburg, Russia, 190000
Grey milkcap mushrooms (<B>Lactarius vietus</B>) near Orekhovo, 40 miles north from Saint Petersburg. Russia, <A HREF="../date-en/2016-09-09.htm">September 9, 2016</A>
LinkGrey milkcap mushrooms (Lactarius vietus) near Orekhovo, 40 miles north from Saint Petersburg. Russia, September 9, 2016
Location on mapsUnnamed Road, Leningradskaya oblast', Russia
Grey milkcap mushrooms (<B>Lactarius vietus</B>) near Kavgolovskoe Lake in Toksovo, north from Saint Petersburg. Russia, <A HREF="../date-en/2017-07-14.htm">July 14, 2017</A>
LinkGrey milkcap mushrooms (Lactarius vietus) near Kavgolovskoe Lake in Toksovo, north from Saint Petersburg. Russia, July 14, 2017
Cortinarius flexipes, <B>Lactarius vietus</B>, and Leccinum holopus mushrooms in a swamp in Sosnovka Park. Saint Petersburg, Russia, <A HREF="../date-en/2017-09-02.htm">September 2, 2017</A>
LinkCortinarius flexipes, Lactarius vietus, and Leccinum holopus mushrooms in a swamp in Sosnovka Park. Saint Petersburg, Russia, September 2, 2017
Location on mapsUnnamed Road, St Petersburg, Russia
Cortinarius flexipes, <B>Lactarius vietus</B>, Leccinum holopus, and Mycena megaspora mushrooms in a swamp in Sosnovka Park. Saint Petersburg, Russia, <A HREF="../date-en/2017-09-02.htm">September 2, 2017</A>
LinkCortinarius flexipes, Lactarius vietus, Leccinum holopus, and Mycena megaspora mushrooms in a swamp in Sosnovka Park. Saint Petersburg, Russia, September 2, 2017
Location on mapsUnnamed Road, St Petersburg, Russia
Grey milkcap mushrooms (<B>Lactarius vietus</B>) in a swamp in Sosnovka Park. Saint Petersburg, Russia, <A HREF="../date-en/2017-09-02.htm">September 2, 2017</A>
LinkGrey milkcap mushrooms (Lactarius vietus) in a swamp in Sosnovka Park. Saint Petersburg, Russia, September 2, 2017
Location on mapsUnnamed Road, St Petersburg, Russia, 194295
Group of grey milkcap mushrooms (<B>Lactarius vietus</B>) in a swamp in Sosnovka Park. Saint Petersburg, Russia, <A HREF="../date-en/2017-09-02.htm">September 2, 2017</A>
LinkGroup of grey milkcap mushrooms (Lactarius vietus) in a swamp in Sosnovka Park. Saint Petersburg, Russia, September 2, 2017
Location on mapsUnnamed Road, St Petersburg, Russia, 194295
Amanita fulva (egg stage), Mycena megaspora, <B>Lactarius vietus</B>, Cortinarius sp., Hebeloma crustuliniforme, and Laccaria proxima mushrooms in a swamp in Sosnovka Park. Saint Petersburg, Russia, <A HREF="../date-en/2017-09-02.htm">September 2, 2017</A>
LinkAmanita fulva (egg stage), Mycena megaspora, Lactarius vietus, Cortinarius sp., Hebeloma crustuliniforme, and Laccaria proxima mushrooms in a swamp in Sosnovka Park. Saint Petersburg, Russia, September 2, 2017
Location on mapsUnnamed Road, St Petersburg, Russia, 194295
Galerina triscopa, <B>Lactarius vietus</B>, Leccinum holopus, Cortinarius flexipes, Mycena megaspora, Hebeloma crustuliniforme, Laccaria proxima, Amanita fulva (egg stage), and Cortinarius sp. mushrooms in a swamp in Sosnovka Park. Saint Petersburg, Russia, <A HREF="../date-en/2017-09-02.htm">September 2, 2017</A>
LinkGalerina triscopa, Lactarius vietus, Leccinum holopus, Cortinarius flexipes, Mycena megaspora, Hebeloma crustuliniforme, Laccaria proxima, Amanita fulva (egg stage), and Cortinarius sp. mushrooms in a swamp in Sosnovka Park. Saint Petersburg, Russia, September 2, 2017
Location on mapsUnnamed Road, St Petersburg, Russia, 194295
Mycena megaspora, Galerina triscopa, Leccinum holopus, <B>Lactarius vietus</B>, Hebeloma crustuliniforme, Amanita fulva, and Cortinarius flexipes mushrooms in a swamp in Sosnovka Park. Saint Petersburg, Russia, <A HREF="../date-en/2017-09-02.htm">September 2, 2017</A>
LinkMycena megaspora, Galerina triscopa, Leccinum holopus, Lactarius vietus, Hebeloma crustuliniforme, Amanita fulva, and Cortinarius flexipes mushrooms in a swamp in Sosnovka Park. Saint Petersburg, Russia, September 2, 2017
Location on mapsUnnamed Road, St Petersburg, Russia, 194295
Grey milkcap mushrooms (<B>Lactarius vietus</B>) near Kuzmolovo, north from Saint Petersburg. Russia, <A HREF="../date-en/2017-09-03.htm">September 3, 2017</A>
LinkGrey milkcap mushrooms (Lactarius vietus) near Kuzmolovo, north from Saint Petersburg. Russia, September 3, 2017
Location on mapsUnnamed Road, Leningradskaya oblast', Russia, 188663
Grey milkcap mushrooms (<B>Lactarius vietus</B>) near Orekhovo, 45 miles north from Saint Petersburg. Russia, <A HREF="../date-en/2017-09-09.htm">September 9, 2017</A>
LinkGrey milkcap mushrooms (Lactarius vietus) near Orekhovo, 45 miles north from Saint Petersburg. Russia, September 9, 2017
Location on mapsUnnamed Road, Leningradskaya oblast', Russia
Grey milkcap mushrooms (<B>Lactarius vietus</B>) in moss near Orekhovo, 45 miles north from Saint Petersburg. Russia, <A HREF="../date-en/2017-09-09.htm">September 9, 2017</A>
LinkGrey milkcap mushrooms (Lactarius vietus) in moss near Orekhovo, 45 miles north from Saint Petersburg. Russia, September 9, 2017
Location on mapsUnnamed Road, Leningradskaya oblast', Russia
Grey milkcap mushrooms (<B>Lactarius vietus</B>)(?) in Sosnovka Park. Saint Petersburg, Russia, <A HREF="../date-en/2017-09-16.htm">September 16, 2017</A>
LinkGrey milkcap mushrooms (Lactarius vietus)(?) in Sosnovka Park. Saint Petersburg, Russia, September 16, 2017
Location on mapsUlitsa Zhaka Dyuklo, 67, St Petersburg, Russia, 194214

AI-generated summary of observations

Observations of Lactarius vietus in Leningrad Oblast and north-western Russia show that the fungus typically grows in swampy areas with sphagnum moss. Multiple sightings were recorded in Sosnovka Park, Saint Petersburg, between 2013 and 2017, often in association with other mushroom species such as Cortinarius flexipes, Leccinum holopus, and Mycena megaspora. The fungus was also found near Orekhovo, Kavgolovskoe Lake, and Kuzmolovo, all located north of Saint Petersburg. The sightings occurred between July and September, suggesting a summer to early fall fruiting period. The mushrooms were often found in groups, with some observations noting them growing in moss or sphagnum moss. The consistent presence of Lactarius vietus in these areas suggests that it is a common species in the region's swampy habitats.

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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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