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Literature:
 
Page number:628 
Remarks (internal):Entoloma rugosum is distinctive because of the small, whitish fruitbodies, relatively large, heterodiametrical, angular to gibbose spores, and heteromorphous lamella edge. It taxonomic position is somewhat unclear, but far  
Description type:Non-original description 
Description:Entoloma rugosum (Malençon) Bon. (tav. 72b, fig. 288)
Eccilia rugosa Malençon in Bull. trimest. Soc. mycol. Fr. 58:40. 1942; Entoloma rugosum (Malençon) Bon in Doc. mycol. 13(49): 45. 1983.
Bibl..: Malençon & Bertault, Fl. Champ. Stipo Maroc 1: 569-570. 1970.
Pileus 7-14 mm broad, irregularly campanulate to convex with small papilla or umbilicate centre, with deflexed margin, not hygrophanous, white, becoming sordid white with age, finely fibrillose-felted under lens. Lamellae distant, arcuate-decurrent, white then pink with entire, concolorous edge. Stipe 10-15 x 1 mm, tapering towards base, white, finely hairy under lens.
Spores 9.5-12.0 x 7.5-9.0 µm, average spore 11.0 x 8.4 µm, Q = 1.2-1.3-1.5, many-angled to nodulose in side-view. Basidia 25-38 x 9-13 µm, 4-spored, clamped. Lamella edge heterogeneous. Cheilocystidia scattered or in clusters among basidia, 24-50 x 3-8 µm, subcylindrical to sublageniform, thin-walled. Pileipellis a thin cutis with transitions to a trichoderm, made up of radially arranged, cylindrical to slightly inflated hyphae, 3-17 um wide. Stipitispellis a cutis with transitions to a trichoderm, made up of cylindrical hyphae, 3­12 µm wide with cylindrical to coralloid caulocystidia, 22-60 x 3-14 µm. Pigment not observed. Clamps present.
Habitat: In large groups on moist soilunder Symphytum officinale and in grassy spot in Quercus llex forest. July-Oct.
Distribution: poorly known, only from a few recent collections, in France, Estonia, and Maroc.

 
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