Pileus 20–50 mm in diameter, hemispherical or campanulate when young, expanding to convex or plano-convex, with or without a low, broad umbo, with or without a shallow depression at center; surface smooth or innately radially fibrillose, with or without well defined squamules at center; dark brown (in the range of 5YR 3/2–3/4, 4/ 3–4/6) or gray-brown (5YR 4/1–4/2, 3/1); dry or slightly viscid when moist; margin smooth or slightly translucently striate. Lamellae crowded, free, ventricose, up to 8 mm broad, white when young, later pink, with pigmented edges but not uniformly so: dark brown in the 1/2 or 1/3 near the pileus margin and even, or white, flocculose in the part near the stipe. Stipe 30–65 × 3–15 mm, cylindrical, with slightly broad base; surface white, smooth or with longitudinal brown or gray-brown fibrils, sometimes grouped forming small squamules especially near the base. Context in stipe and pileus white. Smell indistinct. Taste indistinct. Spore print not recorded.
Basidiospores [60, 3, 3] 6.5–9.0 × 4.5–6.5 μm, avl × avw = 7.7–8.2 × 5.4–5.7 μm, Q = 1.35–1.60, avQ = 1.41–1.45, ellipsoid, sometimes ovoid or slightly constricted in the middle. Basidia 15–35 (40) × 5–15 μm, tetrasterigmate, clavate, some with median constriction. Pleurocystidia metuloid, 60–80(–100) × 12–22(–30) μm, fusiform, narrowly fusiform or narrowly utriform with 2–4 apical hooks (commonly bifid, but entire hooks also present), rarely with small lateral hooks, hyaline, with up to 4 μm thick wall, frequent all over lamellar faces. Intermediate cystidia similar to the pleurocystidia but smaller and/or with thinner walls, a few irregularly shaped, without distinct apical hooks and/or with rounded apices; without a predominant morphological type. Lamellar edge sterile. Cheilocystidia 40–70 × 12–25 μm, narrowly clavate or cylindrical, more rarely clavate or narrowly utriform, hyaline or with evenly dissolved, intracellular, brown pigment, thin-walled, crowded, forming a well- developed strip. Pileipellis a cutis, with terminal elements 85–165 × 7–17 μm, individual elements cylindrical, usually strongly tapering towards apex, mostly filled with brown intracellular pigment, with thin, smooth walls. Stipitipellis a cutis; hyphae 5–25 μm wide, cylindrical, hyaline or with brown intracellular pigment, with thin, smooth walls. Clamp-connections common and readily seen on pileipellis hyphae but not at every septum; also observed in other parts of the basidiocarp.
Habit, habitat and phenology:—Solitary or gregarious, growing on well-decayed conifer wood (e.g. Tsuga). In conifer or mixed forests. Recorded in transitional boreal/temperate or boreal areas. August–September.
Distribution:—Eurasia. Known from the Russian Far East (Primorsky Territory North America. Known from eastern North America (Newfoundland Island, New York).