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11 October 2008 West Sussex. Photograph copyright Leif Goodwin
Convex, white, then brown, surface powdery, to about 4cm across
White, then grey-brown
Summer to winter
On rotting Russula nigricans, and very rarely, Russula adusta
Spores ellipsoidal, smooth (5-5.5) x (3.5-4) µm2. Chlamydospores star-shaped, knobbly (12-15) µm2
This is an extremely unusual species as it forms a powdery layer of chlamydospores on the cap surface. These unusual asexual spores are created by hyphal budding rather than on basidia as is usually the case for basidiomycetes. Take care not to confuse young specimens with Asterophora parasitica.
Young specimens. 11 October 2008 West Sussex. Photograph copyright Leif Goodwin
Chlamydospores viewed with a x100 immersion objective. Photograph copyright Leif Goodwin
Spores viewed with a x100 immersion objective and x2.5 projection lens. 5 September 2009. Photograph copyright Leif Goodwin