* Entoloma placidum is fairly distinctive with its dark grey pileus, blue, innately silvery-fibrillose stipe, farinaceous smell, and habitat on rotten Fagus stumps. The cheilocystidia depicted in an earlier paper (Noordel, 1982a: 160, fig, 4) are no real cystidia, but vacuolised basidioles.*
Pileus 20-40 mm broad, conical then convex, usually with slightly to distinctly depressed centre, rarely with umbo, with involute then straight margin, not hygrophanous, not translucently striate, dark grey to grey-brown, minutely squamulose all over. Lamellae, L = 20-35, l = 1-7, moderately crowded, broadly adnate or emarginate, sometimes with decurrent tooth, segmentiform, white then pink with concolorous, entire edge. Stipe 30-60 × 2-4 mm, cylindrical, often slightly broadened towards base, often slightly rooting, dark indigo or blue-grey, minutely pruinose at apex, silvery striate below. Smell and taste farinaceous.
Spores 8-11 (-11.5) x 6-7(-7.5) µm, Q = 1.2-1.6, heterodiametrical, 6-8-angled in side-view with rather weak angles. Lamella edge fertile or with scattered, vacuolised basidioles (“cheilocystidia”). Pileipellis a cutis with transitions to a trichoderm, made up of 6-24 µm wide, cylindrical, septate hyphae with inflated terminal elements, 65-120 × 10-25 µm. Pigment brown, intracellular in pileipellis. Clamps present.
Habitat: terrestrial and on rotten wood of Fagus in Fagus forests on calcareous soil; Aug.acl.
Distribution: Rare, but wide-spread all over Europe where Fagus occurs.