Cap 2-8 mm, covered with a separable, gelatinous pellicle (not easy to observe), hemispherical to convex, becoming plano-convex, more or less umbonate, sulcate, translucent-striate, glabrous, at first grey-brown, fading towards pale grey to grey-white. Gills 10-12 reaching the stem, ascending, fairly broad, free or attached to a pseudocollarium, white or greyish white, the edge separable as a gelatinous thread. Stem 5-20 x 0.1-0.5 mm, entirely pubescent, glabrescent, except for the base, watery white, springing from a white-pubescent basal disc, 1 mm broad. Odour none. Basidia 20-32 x 8-9 µm, clavate, 4-spored. Spores 7.5-11 x 4-5(-6.0) µm, Q = 1.5-2.1, Qav ˜ 1.9, pip-shaped to subcylindrical, non-amyloid. Cheilocystidia 20-55 x 2.7-9 µm, subcylindrical, clavate or irregularly shaped, apically with one or 2-3 necks, or with several coarse, variously shaped excrescences 5-11.5 x 2.5-3.5 µm. Pleurocystidia absent. Lamellar trama dextrinoid. Hyphae of the pileipellis 1.5-3.5 µm wide, branched and much entwined, smooth to diverticulate, embedded in gelatinous matter. Hyphae of the cortical layer of the stem smooth, caulocystidia 18-55 x 3.5-8 µm, clavate, cylindrical or subfusiform, smooth. Clamps present in all tissues.
Ecology and distribution
On riparian herbaceous stalks, e. g. Juncus, Scirpus, Glyceria. Summer to autumn. Fairly common in wet localities in southern parts of Norway.