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Page number:277 
Description type:Non-original description 
Description:Entoloma ventricosum Arnolds & Noordel. (tav. 78b, fig. 125)
Entoloma ventricosum Arnolds & Noordel. in Persoonia 10: 298. 1979.
Icon.: Arnolds & Noordeloos in Fung. rar. Ic. col. 12, pl. 93c. 1981.
Bibl.: Noordeloos in Persoonia 10: 502-503. 1980; Noordeloos in Bas & al., Fl. agar. neerl., Vol.. 1:136-137, fig. 126. 1987; Noordeloos & Hausknecht in Z. Mykol. 55(1): 35-36.1989.
Holotypus: E. J. M. Arnolds 3357,4 Dec. 1974, Eexterveld, Rolde, prov. Drenthe, Olanda (WBS, isotype in L).
Pileus 8-15 mm broad, bluntly conical to convex with acute or blunt papilla, with deflexed then straight or crenate margin, hygrophanous, when moist vivid red-brown to grey-brown, translucently striate up to half the radius, pallescent on drying to yellowish brown or yellowish grey, smooth, glabrous. Lamellae, L = 15-18, l = 1-3, rather distant, narrowly adnate or deeply emarginate, broadly ventricose, thickish, often veined on sides, grey then grey- or brown-pink, with entire, concolorous edge. Stipe 15-50 x 2-4 mm, cylindrical, pale grey-, yellow- or reddish brown, distinctly paler than pileus, polished to very finely and sparsely silvery striate, white tomentose at base. Context thin, membranaceous, concolorous with surface. Smell none. Taste mild.
Spores 9.0-11.5 x 7.0-9.0 µm, Q = 1.2-1.4, heterodiametrical, 5- 7-angled in side-view. BasidÀ¬a 4-, sometimes also 2-spored. Lamella edge fertile. Cystidia absent. Pileipellis a cutis of narrow, cylindrical, 4-8 µm wide hyphae. Pigment pale brown, intracellular in pileipellis and upper pileitrama. Clamps abundant in hymenium, elsewhere more scattered.
Habitat: in poorly manured, semi-natural grasslands on relatively acidulous soils, also in subalpine meadows with Pinus mugo, P. cembra and Alnus viride. Summer-late autumn.
Distribution: Wide-spread, but rarely recorded. Known from The Netherlands, France, and Austria.
Taxon name: