Ganoderma subresinosum

Basidiome annual, sessile (with distinctly contracted base), weakly laccate, woody. Pileus 16–20 × 11–13 cm, up to 4 cm thick at the base, sub-orbicular; upper surface dark brown (8F4), radially rugose, concentrically sulcate with irregularly ruptured crust overlying the context; margin blunt or wavy, yellow brown; lower surface brownish orange (6C4). Hymenophore up to 20 mm long, indistinctly stratose; pores initially greyish orange (5B3), bruising brownish orange (6C4), pores circular, 3–5 per mm. Context up to 2 cm thick, duplex, dry; lower layer, light orange (5A4), fibrous, composed of coarse loose fibrils; upper layer brownish orange (6C5), corky. Basidiospores (n = 25) (13.3–)13.9–15.3–16.5(–17.8) × (8.0–)9.2–10.2–11.1(–12.1) μm (Qm =1.5, Q = 1.3–1.9, with myxosporium). (11.6–)12.2–13.5–14.8(–16.3) × (6.3–)7.3–8.4–9.5(–10.4) μm (Qm =1.6, Q = 1.3–2.2, without myxosporium), ellipsoid to ellongate, orange (6A6), pale orange (6A3) to greyish orange (5B4), with a brown eusporium bearing fine, short, and distinct echinulae, overlaid by a hyaline myxosporium. Pileipellis a hymeniderm, light orange (5A4), clavate like cells, dextrinoid. Context dimitic; generative hyphae not observed; skeletal hyphae (n = 25) (2.2–3.1–4.0) μm in width, thick-walled, nearly solid, sometimes branched, orange white (5A2); binding hyphae (n = 20) (1.4–2.3–3.3) μm in width, thick-walled, branched, nearly solid, brownish-orange (6C4). (Fig 1)

Facesoffungi number: FoF03808

Habitat: On a decaying wood log, accompanied in humus-rich soil with over heavily rotted litter on the ground.

Specimens examined: LAOS, Savannakhet Province, Dong Phou Vieng, mixed deciduous forest, 16°23′N–105°59′E, elev. 283 m, 21 June 2017, P. Phensinthgthem (GACP18011907, GACP18011908). CHINA, Hainan Province, Wuzhishan Mountain, Coniferous rainforest, 18°53′N–109°38′E, elev. 1240 m, 16 August 2014, T.C. Wen (GACP14081663, GACP14081690).