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Page number:432 
Remarks (internal):Entoloma alnetorum is very similar to E. tjallingiorum in microscopical characters, especially then thin-walled, almost nodulose spores, and type and pigmentation of pileipellis. Distinctive are, however, the pale ochraceous pileus, and the vernal appearance in Alnus incana forest. For the lime being it is considered as a good species awaiting more collections to studi the variability of the characters. 
Description type:- 
Description:Entoloma alnetorum Monthoux & Röllin (fig. 194)
Entoloma alnetorum Monthoux & Rollin in MycoL helv. 3: 47. 1988. Bibl.: Monthoux & Rollin, Le.: 43-52, pL 18, 1-5. 1988.
Pileus 20-55 mm broad, 15-30 mm high, hemispherical, then expanding to plano-convex with large umbo, sometimes staying truncately conical, with involute margin, with lobed, grooved marginal zone, not hygrophanous, not translucently striate, pale ochraceous then sordid ochre, without any trace of blue or violaceous, entirely finely tomentose or radially squamulose. Lamellae moderately distant, adnate-uncinate or with small decurrent tooth, segmentiform to ventricose, white then grey-ochre with pink tinge, with concolorous, offen denticulate edge. Stipe 50-80 x 5-8 mm, cylindrical, offen broadened towards base, entirely fibrillose-striate, violaceous in upper part, grey below, base white tomentose. Context thin, pale violaceous-grey in stipe, ochre in cortex of pileus, white in inner part of pileus. Smell distinctly aromatical, like fruit or herbs. Taste subspermatical.
Spores 9.5-11.0 x 6.0-8.0 µm, Q = 1.3-1.7, many-angled, almost nodulose in side-view, thin­walled. Basidia 4-spored, clamped. Lamella edge heterogeneous. Cheilocystidia 25-55 x 6-­12 µm, subcylindrical to sublageniform, scattered among basidia, easily collapsing, thin­walled. Pileipellis a cutis with transitions to a trichoderm, made up of cylindrical to slightly inflated hyphae, 12-25 µm wide. Pileitrama regular, made up of medium-sized, cylindrical elements, 80-200 x 6-22 µm. Pigment intracellular and encrusting the hyphae of pileipellis and upper pileitrama. Brilliant granules sparse in pileitrama. Clamps present in all tissues.
Habitat: On old trunks and branches of Alnus incana in submontane Alnus forest at about 850 m alt., spring (june)
Distribution: Only known from the type-locality in Switzerland.

 
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