Hygrophorus brunneodiscus

Description. Pileus 20 - 50 mm broad, hemispherical or conical with a slightly involute or slightly revolute margin when young, becoming convex with an expanded margin when mature, whitish to brownish as a whole, brownish-orange, light brown, yellowish-brown (5 C 4 - 5, 5 D 4 - 5, 5 E 5 - 8) at the disc (about one fourth part of the radius from the centre to the margin), becoming paler to greyish-yellow (4 B 3 - 4), greyish-white (4 B 1) or whitish outwards and white at the margin or with a white marginal zone of 1 - 2 mm wide, viscid, covered with a glutinous layer of transparent materials when wet. Lamellae short decurrent to decurrent, white, waxy, with 36 - 40 complete lamellae and 1 - 3 lamellulae between two complete lamellae; lamella edge concolorous, entire. Stipe 40 - 90 x 4 - 7 mm, cylindrical, hollow, nearly equal to slightly thinner at apex and tapering towards the base; pale yellow to greyish-yellow (4 A 3, 4 B 3), white to yellowish-white (4 A 2) at apex, sometimes white at base; sticky, covered with a layer of transparent materials when wet, easily-sticking debris on the slime layer, usually fibrillose or with scattered white fibrillose dots at apex. Context thin, white to light brown, with slight fishy odour. Basidiospores (6.5) 7 - 9 (9.5) x 4 - 5.5 (6) μm [mean length = 7.6 µm, mean width = 4.6 µm], Q = (1.3) 1.4 - 2 (2.1), Qm = 1.68, ellipsoid to oblong, smooth. Basidia 32 - 48 x 6 - 8.5 µm, Q = 4.1 - 6.6, Qm = 5.3, clavate, thin-walled, 4 - spored, with sterigmata 5.5 - 7 (9) µm long. Pileipellis an ixotrichoderm, composed of septate cylindrical hyphae, covered with a gelatinous layer; hyphae thin-walled, 2.5 - 5 μm wide, slightly yellowish and glutinous in KOH. Hymenophoral trama divergent, composed of septate, thin-walled and cylindrical hyphae; hyphal cells 45 - 70 x 6 - 10 μm, hyaline. Clamp connections present.