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 Add this item to the list  834804 Original description
Remarks (public):Cortinarius ulkhagarhiensis belongs to the sect. Phlegmacioides based on both morphological and molecular (nrDNA ITS and LSU regions) data. Within the section it belongs to the /daulnoyae clade, where it forms the close sister species of the European C. caesiocolor Kytöv., Liimat. & Niskanen. They differ by 5 nucleotide and indel positions. The two species differ also in morphological characters. The spores of C. ulkhagarhiensis are significant larger than those of C. caesiocolor (average spores sizes 10.97 × 6.2 μm vs. 9.85 × 5.8 μm, respectively), and they are longer too (Qav = 1.77 vs. 1.70). Macromorphologically they might be rather similar, with e.g. bluish context. Another closely related species is the European C. daulnoyae (Quél.) Sacc. (syn.: C. chromataphilus Rob. Henry and C. sabuletorum Redeuilh & Reumaux) which has strong earth-like smell, yellowing, never bluish context, and phylogenetically is more distant. Morphologically other species in sect. Phlegmacioides might also resemble to C. ulkhagarhiensis, but the ecology and ITS sequence data might help in identification. 
Description type:Original description 
Description:Pileus up to 110 mm in diam., plano-convex to applanate, slightly inflated at centre, surface glabrous, slimy when young, slightly bluish greyish when young, but soon becoming reddish golden to light brown (6C8–6D8); margin smooth, fairly undulate. Lamellae emarginate, crowded, greyish when young, later greyish orange (6B4), brownish orange (6C5) when mature, lamellulae present, of various lengths. Stipe 60–90 × 10–22 mm, , prominently clavate at the base, bulb up to 30 mm wide, light brown, becoming brownish orange to reddish orange (6D5, 6B7–7B7) with greyish lilac (15B4-3) tinge throughout the stipe, especially at apex. Context greyish to bluish-lilac. Odour not recorded. Taste not observed. Spore print brown (8E8). Basidiospores (10.2–)10.6–11.3(–11.7) × (5.7–)5.9–6.6(–6.8) μm, Av = 10.97 × 6.2 μm, Q = (1.63–)1.71–1.83(–1.94), Qav = 1.77, n=50, amygdaloid, verrucose. Basidia 4-spored, 25–30 × 5–7 μm, clavate. Pileipellis more or less simplex (mono-layered); rather weakly coloured in KOH. Epicutis at surface of narrow (2–4(–5) μm wide), loosely erect-entangled, gelatinous, pale yellow hyphae; below a few layers of slightly wider (3–6(–8) μm wide) hyphae with slightly thickened yellow walls, a few with pale, weakly encrusted wall pigment; the basal part of epicutis of hyphae up to approx. 10 μm wide, with distinctly thickened, yellow walls, forming tightly cemented bundles which in surface view forms a zig-pattern. Habitat and distribution — Caespitose, occurring among leaf litter of Quercus leucotrichophora, on humicolous soil, in temperate broadleaved forests dominated by mainly Q. leucotrichophora, Rhododendron arboreum, and Myrica esculenta. 
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