Birch Webcap - Cortinarius triumphans


Slimy in wet weather, remaining sticky; 5 to 12 cm in diameter; hemispherical to convex at first, expanding until almost flat or occasionally shallowly umbonate but retaining a downturned or slightly incurved margin; golden yellow with a slightly browner centre, the cap surface is radially fibrillose and sometimes becomes slightly scaly towards the centre when fully mature. Cap and stem flesh are pale cream. The adnate-emarginate gills are raggedly toothed, close and initially creamy white with a faint lavender tinge, turning ochre and then becoming stained rusty brown as the spores mature. A whitish cortina (cobweb-like partial veil) covers the gills of very young caps.

Identification difficulty

Found in broadleaf and mixed woodlands with birches, Beech and occasionally other broadleaf trees.

When to see it

August to October in Britain and Ireland.

UK Status

Widespread but infrequent in Britain.

VC55 Status

Infrequent in Leicestershire and Rutland.

Leicestershire & Rutland Map


Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

UK Map

Species profile

Common names
Birch Webcap
Species group:
Records on NatureSpot:
First record:
19/09/2015 (Watson, Ashley)
Last record:
19/09/2015 (Watson, Ashley)

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% of records within its species group

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