Cap 7-30 mm across, conical, parabolical, convex to plane, usually with a prominent, obtuse umbo, sulcate, translucent-striate, hygrophanous, at first pruinose, glabrescent, brownish black to dark brownish grey with a blackish centre, fading to grey, margin grey to whitish. Gills 17-26 reaching the stem, adnexed, with or without a short tooth, somewhat rugulose and dorsally intervenose with age, grey to dark grey with paler to white edge. Stem up to 60 x 3 mm, fragile, cylindrical, with age sometimes flattened, and occasionally somewhat fissured lengthwise, equal or somewhat broadened below, glabrous, becoming shiny, apically pale grey, brown to grey-brown below, becoming entirely grey, the base covered with long, coarse, flexuous, whitish fibrils. Odour indistinctive or nitrous. Taste strong, nitrous or somewhat rancid. Basidia c. 27 x 7 µm, clavate, 4-spored, with sterigmata c. 7 µm long. Spores 7-9 x 4.5-6 µm, Q = 1.3-1.7, Qav ˜ 1.6, pip-shaped, amyloid. Cheilocystidia 38-68 x 0-16 x 2.5-5 µm, forming a sterile band, lageniform, smooth. Pleurocystidia similar, not numerous. Lamellar trama dextrinoid. Hyphae of the pileipellis 2.7-4.5 µm wide, not very densely covered with cylindrical, curved to flexuous excrescences 4.5-18 x 1.8-2.2 µm. Hyphae of the cortical layer of the stem 1.6-3.5 µm wide, smooth, terminal cells scarce, 45-65 x 5.5-7 µm, clavate. Clamps present in all tissues.

Cheilocystidia, hypha of the pileipellis and spores.


Ecology and distribution

Gregarious among needles under Juniperus communis in grassland or on open lawns. Autumn. Recorded from two localities in South East Norway.