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Page number:882 
Remarks (internal):Entoloma transvenosum was described from Denmark (Noordeloos, 1982), and has only been found few times since then. Thus the variability is poorly known. A recent collection from Germany fits rather well in the concept of E. transvenosum with its dark brown fruitbodies, veined, dark brown lamellae, brittle context, and farinaceous smell and taste. The spores of this collection are small, compared with the type (9-13 x 7-10 µm). However, this may be due to infraspecific variation. A coloured photograph is presented here. 
Description type:Original description 
Description:Entoloma transvenosum var. microsporum Noordel. & Hauskn., var. nov. (fig. 301)
Pileus 20-55 mm, expanded-convex with undulating, often somewhat fissured margin, hygrophanous, when moist slightly translucently striate at margin, dark brown (K&W 7173-4, 7175, 6-7175, 6174, 6173-4), pallescent on drying, irregularly finely radially rugulose-striped. Lamellae crowded, adnate-emarginate, irregularly veined and interveined to somewhat anastomosing, brown-grey to grey-brown then with pink tinge from ripe spores, with subentire, concolourous edge. Stipe up to 60 x 10 mm, cylindrical, brownish grey at apex, towards base somewhat lighter, longitudinally striate. Context very brittle. Smell and taste farinaceous.
Spores 7.5-10.5 x 7.0-8.5 µm, average 9.3 x 7.7 ?m, Q = 1.1-1.2-1.3, irregularly 6-9 angled in side-view, relatively thick-walled. Basidia 30-45 x 4.0-7.5 µm, 4-spored, clamped. Cystidia absent, but among basidia sometimes-irregular cylindrical flexuous elements observed, 2.0-5.0 µm wide. Hymenophoral trama regular, of cylindrical elements, 20-70 x 4.0-9.0 ?m. Pileipellis a differentiated cutis of cylindrical hyphae, 4.0-10 µm wide with some ascending cylindrical to subclavate terminal elements, subpellis weakly developed, of short, cylindrical to slightly inflated elements, gradually passing into trama. Pigment very abundant brown, intracellular visible as dark brown globules in the hyphae, very rarely also some minute incrustations on the connective hyphae deeper in the pileipellis. Clamp-connections abundant in all tissues.
Habitat: in dense herbaceous vegetation with Urtica and Rubus in edge of wood (Fagus, Tilia, Salix).
 
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