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Description type:Original description 
Description:Pileus 10-60 mm broad, hemispherical, plano-convex expanding
to applanate, with incurved, straight or upturned margin, sometimes slightly depressed in center when old, never umbonate, not hygrophanous, not striate, entirely covered with small to coarse squamules and scales, uniformly deep blue (20F8, 20E8) at first, then with violet tinge (18E7), dry. Lamellae adnate-emarginate with decurrent tooth, subventricose, crowded, pure white when young becoming pink, with irregular concolorous edge, up to 4 mm broad, with 3 tiers of lamellulae. Stipe 40-50 — 4-8 mm, cylindrical to subclavate, very fragile, hollow, dry, concolorous or paler than pileus, with blue furfuraceous or pruinose squamules, base with white tomentum. Flesh bluish white. Smell not distinctive. Taste not distinctive.
Spores 9-10.5 — 6.5-8 µm, Q=1.3-1.5, heterodiametrical, with 5-7 angles in side view, thick-walled. Basidia 25-40 — 11-13 µm, clavate, clampless. Lamellae edge sterile. Cheilocystidia 50-100 — 6-11 µm, fusoid, with abundant brilliant granules. Pleurocystidia absent. Hymenophoral trama regular, made up of cylindrical and narrow elements, 50-75 — 6-12 µm. Brilliant granules abundant. Pileipellis a trichoderm of cylindrical and inflated hyphae with terminal elements 25-95 — 9-25 µm, pigment violaceous with brownish tinge, intracellular. Subpellis subhyaline to very pale brown, up to 23 µm in diameter. Caulocystidia narrowly clavate to fusiform, with golden yellow brown, intracellular pigment. Clamp connections absent.
 
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