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Page number:164 
Remarks (public):Entoloma mougeotii comes very close to E. corvinum, but that is a dark blue species without violaceous tinges.
Var. fuscomarginatum Noordel. with brown lamella edge has been found in Norway, Denmark and West Germany.
Description type:Non-original description 
Description:Entoloma mougeotii (Fr.) Hesler in Beih. Nova Hedwigia 23 158. 1967. - Fig. 177.
Eccilia mougeotii Fr. in Quél. in Mém. Soc. Emul. Montbéliard, sér ll, 5: 345. 1873 (Champ. Jura Vosges 2); Rhodophyllus mougeotii (Fr.; J. Lange in Dansk. bot. Ark. 2(11): 39. 1921; Leptonia mougeotii (Fr.' PD. Orton in Trans. Br. Mycol. Soc. 43: 290. 1960; Entoloma ardosiacum var. mougeotii (Fr.) Pears. & Dennis in Trans. Br. mycol. Soc. 31 170. 1948.
Misappl. - Eccilia griseorubellus sensu Quél. in Mém. Soc. Emul Montbéliard, ser- II, 5: 248. 1872 (Champ. Jura Vosges 1); Entoloma ardosiacum sensu Quél. in C.R. Ass. franc. Av. Sci. (La Rochelle, 1882; 11: 392. 1 883 (Champ. Jura Vosges 11); sensu Bres., Iconogr. mycol 11: pl. 549. 1929.
Sel. icon. - Bres., Iconogr. mycol. 11: pl. 549. 1929 (as E ardosiacum); J. Lange, Fl. agar- dan 2: pl. 80H. 1937; Ryman & Holm˴sen, Svampar: 384. 1984 (as E. ardosiacum).
Pileus 15-45 mm, convex with strongly involute margin, with slightly depressed to deeply umbilicate centre, expanding with age, finally irregularly applanate to concave with irregular marginal zone. not hygrophanous, not translucently striate, dark violaceous black at centre, violaceous grey towards margin, becoming brownish grey with distinct violaceous tinge when old (Mu. 10 YR 2-5/3; 3-6/l-2 with violaceous tinge or more like K. & W. 14F2, 14C-D2), entirely tomentose or velutinous at first, then breaking up in minute squamules that are adpressed at margin and uplifted at centre, often breaking up in radial rows of small squamules, showing the context between the fibrils. Lamellae, L = 20-40, I = 1-9, moderately distant to rather crowded. adnate, sometimes slightly emarginate or with decurrent tooth, rarely distinctly decurrent, segmentiform to ventricose, up to 10 mm broad, pale creamy or white, then pink, rarely with slight lilaceous tinge, finally sordid brown-pink with slightly irregular, concolorous (or brown, see note) edge. Stipe 30-80 x 2-4.5 mm, cylindrical or compressed. sometimes slightly broadened at apex or base, grey violaceous or steel-grey, paler than pileus', with darker, fibrillose-flocculose covering, white tomentose at base, solid or fistulose. Context rather thin in pileus, with about same colour as surface, fibrillose and slightly paler in stipe. Smell not distinctive or slightly sweetish like flowers. Taste none or slightly oily-rancid.
Spores 9.0-11.5(-12.5) x 6.0-8.0(-9.0) µm, Q = 1.2-l.7, Q av. 1.45, ellipsoid in outline with 5-9 angles in side-view. Basidia 27-48 x 8-11 µm, 4-, rarely' also 2-spored, clampless- Lamella edge sterile. Cheilocystidia 16-60(-110) x 8-15 µm. cylindrical to clavate. Pileipellis a trichoderm at centre, more like a cutis at margin, made up of 8-20 µm wide cylindrical or slightly inflated hyphae with up to 25 µm wide terminal elements. Pigment violaceous brown, intracellular in pileipellis. Brilliant granules abundant in pileitrama. Clamp-connections absent.
Habitat & distr. - Solitary or in small groups among grasses and mosses or oxn humus in hayfields, dune-valleys, often in open forest of deciduous trees (Salix, Alnus, etc.) always on slightly to distinctly calcareous soil. Rare. Not uncommon in the lowlands of W- and N. Europe and the mountains of N. and C. Europe in (semi-)natural grasslands and open woodland. Aug.-Oct.
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