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Fungi: Basidiomycota: Agaricomycetes: Agaricales: Cortinariaceae: Cortinarius hemitrichus (Pers.) Fr., 1838

Cortinarius hemitrichus – Frosty webcap

Synonyms: Agaricus hemitrichus, Hydrocybe hemitricha, Telamonia hemitricha, Telamonia paludosa.

Common name: frosty webcap.

Russian name: Pautinnik poluvolosistyy.

Extract from Wikipedia article: Cortinarius hemitrichus, also known as the frosty webcap, is a basidiomycete mushroom of the genus Cortinarius. Young mushrooms are characterized by their brown cone-shaped caps covered with dense white fibrils.

AI-generated description

Cortinarius hemitrichus is a species of fungus that belongs to the genus Cortinarius. It has a small to medium-sized cap, typically 1-4 cm in diameter, that is convex to bell-shaped and often has a slight umbo. The cap surface is usually covered with fine, downy hairs, especially when young, and ranges in color from reddish-brown to yellowish-brown. The gills are adnate to slightly decurrent and crowded, with a similar color to the cap. The stem is slender, 1-4 cm long and 0.2-0.5 cm thick, and often has a club-shaped or bulbous base.

In St. Petersburg and Leningrad Oblast, Cortinarius hemitrichus typically grows in coniferous forests, especially in areas with spruce, pine, or fir trees. It can be found fruiting from late summer to early autumn, often in association with mosses and other small plants.

In north-western Russia, the species has been recorded in various regions, including the Murmansk Oblast, Arkhangelsk Oblast, and Vologda Oblast. It tends to prefer acidic soils and can be found in a range of habitats, from dry heaths to moist forests. The fungus is considered to be relatively rare in the region, but can be locally abundant in areas with suitable conditions.

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

Frosty webcap mushrooms (<B>Cortinarius hemitrichus</B>)(?) in area of Lisiy Nos - Olgino west from Saint Petersburg. Russia, <A HREF="../date-en/2017-09-21.htm">September 21, 2017</A>
LinkFrosty webcap mushrooms (Cortinarius hemitrichus)(?) in area of Lisiy Nos - Olgino west from Saint Petersburg. Russia, September 21, 2017
Location on mapsPrimorskoye Shosse, Sankt-Peterburg, Russia, 197755
Young frosty webcap mushrooms (<B>Cortinarius hemitrichus</B>)(?) in area of Lisiy Nos - Olgino west from Saint Petersburg. Russia, <A HREF="../date-en/2017-09-21.htm">September 21, 2017</A>
LinkYoung frosty webcap mushrooms (Cortinarius hemitrichus)(?) in area of Lisiy Nos - Olgino west from Saint Petersburg. Russia, September 21, 2017
Location on mapsPrimorskoye Shosse, Sankt-Peterburg, Russia, 197755

AI-generated summary of observations

Observations of Cortinarius hemitrichus in Leningrad Oblast and north-western Russia reveal the presence of this fungus in the area. Specifically, on September 21, 2017, frosty webcap mushrooms were found in the region of Lisiy Nos - Olgino, west of Saint Petersburg. The mushrooms were observed at different stages of development, with some being young and others more mature. The habitat of these mushrooms was noted to be in a specific area, suggesting that Cortinarius hemitrichus may have a preference for certain environmental conditions in this region. Further observations are needed to confirm the identity of the species and to fully understand its distribution and habits in Leningrad Oblast and north-western Russia. The discovery of these mushrooms highlights the diversity of fungal species in the area and warrants further study. The exact characteristics of the habitat remain to be described.

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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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