Entooma griseopruinatum Noordel. & Cheype

macroscopy:

Pileus 20-50 mm broad, hemispherical to convex with involute margin, not hygrohanous, not translucently striate, rather dark bronze-brown to red-brown, more or less uniformly colored, entirely covered with a greyish bloom. Lamellae, L = about 60-70, l = 3-7, moderately distant, adnate-emarginate, subventricose, grey with pink tinge, with irregular, concolorous or slightly paler edge. Stipe 70-90 x 10-20 mm (middle), fusiform, tapering into a rooting base, white to grey, rather coarsely longitudinally fibrous, base touched with yellow. Context thick, firm, white to grey. Smell farinaceous. Taste mild, farinaceous.

microscopy:

Spores 9.0-11 x 7.0-x 8.0 µm, regularly 5-6 angled in side-view, with pronounced angles, relatively thick-walled. Basidia 38-60 x 9-12 µm, 4-spored, clamped. Lamella edge fertile, cystidia absent. Hymenophoral trama regular, made up of inflated elements, 30-90(-110) x 4-20 µm. Pileipellis a cutis of narrow, cylindrical hyphae, 2-9 µm wide, gradually passing into pileptrama, made up of inflated elements, 20-70(-90) x 5-22 µm. Pigment brown, intracellular in form of dark brown granules in upper layer of pileus. Clamp-connections present in all tissues.

ecology:

Terrestrial in group in mountainous Fagus wood at about 1400 m alt.

distribution:

So far only known from the type locality in France: Haute Savoie, Le Chatelet d'Ayères (Plaine-Joux; Passy), 24 Sept. 2003, J.L. Cheype (L ; isotypus Herb. JLC 030924-8).

comment:

Distinctive are the non hygrophanous pileus with a grey pruinum, fusiform, rooting stipe with a touch of yellow and the dark brown, intracellular pigment. Entoloma griseoluridum differs by having a smooth pileus, which is slightly to distinctly hygrophanous. The yellow tinge at the base of the stipe reminds of Entoloma luteobasis, which has, however, a very different type of spores, smaller and more regularly angled, and is placed in sect. Entoloma.