Cortinarius (Sericeocybe) diosmus Kuhn. (illustrated 40% life size) Cap 3–8cm across, conico-convex; silvery white when fresh. Stem 40–80×8–12mm, base often swollen, up to 15mm wide; concolorous with the cap, silvery white with an indistinct white zone. Flesh white, lightly marbled grey-brown; smell earthy to fruity, pleasant. Gills adnexed; pale ochre-brown at first, later rust. Spores 7.8–9.5×4.7–5.7¼, ellipsoid. Spore print rust. Habitat in mixed and coniferous woods, on alkaline soil; late summer to early autumn. Very rare, not recorded for Britain. Suspect avoid.