Zhuliangomyces illinitus (Fr.) Redhead, Index Fungorum 385: 1 (2019) (Fig. 4)

Description:— Basidioma small to medium. Pileus 30–60 mm diam, convex to hemispherical, typically with an umbonate disc, white to slightly pale yellowish brown, often yellowish brown at center, smooth, strongly viscid; margin non-striate, sometimes with gelatinized appurtenances; trama white. Lamellae free, crowded, white to cream. Stipe 70–110 × 4–8 mm, subcylindric, dirty white, glabrous, viscid; context white; stipe base subcylindrical to attenuate downwards, barely enlarged. Annulus strongly viscid.

Basidiospores 4.0–5.0 × 3.5–4.0 μm, Q = 1.12–1.34, Q m = 1.13 ± 0.08, broadly ellipsoid to subovoid, inamyloid, non-dextrinoid, colorless, hyaline, thinwalled, surface covered with minute verrucae. Basidia 25–30 × 6–7 μm, clavate, 4-spored; sterigmata 3–4 μm long. Lamellar trama bilateral. Mediostratum 25–50 μm wide, composed of abundant ellipsoid to clavate inflated cells (30–100 × 15–25 μm); filamentous hyphae abundant, 3–13 μm wide. Lateral stratum composed of abundant ellipsoid to clavate inflated cells (25–70 × 10–25 μm); filamentous hyphae abundant, 2–13 μm wide. Subhymenium 25–40 μm thick, with 2–3 layers of subglobose, ovoid, fusiform to ellipsoid or irregular cells (8–20 × 5–20 μm). Pleurocystidia and cheilocystidia absent. Pileipellis 60–100 μm thick, an ixotrichodermium composed of vertically arranged filamentous hyphae; terminal cells cylindrical to narrowly clavate, 35–50 × 2.5–5 μm. Clamps present.

Habitat:—On ground under mixed forest of Pinus tabuliformis Carrière and Quercus spp, solitary or scattered, occasionally in small groups, late Summer and Autumn.

Distribution:—North America (USA), and China (Heilongjiang Province, Jilin Province, the southern region in Shanxi Province).

Specimens examined:— CHINA. Shanxi Province: Linfen City, Puxian County, Wulu Mountains, alt. 1630–1830 m, 26 Aug. 2022, collected by J. C. Lv LJC401 (BJTC FM2598), Ning Mao MNM810 (BJTC FM2624); ibid, 7 Sept. 2022, collected by J. Z. Cao LH 1686 (BJTC FM2727); ibid, alt. 1464m, 28 Sept. 2023, collected by J. Z. Cao, Li Fan, H. Y. Fu & Ning Mao MS816 (BJTC FM4172); ibid, Jincheng City, Qinshui County, Xiachuancun, 5 Oct. 2023, collected by J. Z. Cao, Li Fan, H. Y. Fu & Ning Mao CF 2275 (BJTC FM4045).