Castanopsis multiporcata N. H. Xia & D. H. Vuong 2014, sp. nov.

Castanopsis multiporcata N. H. Xia & D. H. Vuong, sp. nov. (Figs. 3, 4) Diagnosis:— The species is similar to Castanopsis buruana, but it can be easily distinguished from the latter by having leaf blade 5–8 cm long (vs. 10–15 cm), papery firmness (vs. thinly leathery), abaxially glabrescent (vs. dense stellate hairs), petioles 0.3–0.7 cm long (vs. 1–1.5 cm), cupules 2–2.5 cm diameter (vs. 1–2 cm diameter) and concave scar (vs. flat or convex). Type: — VIETNAM. Phu Tho: Tan Son District, Xuan Son National Park, Ten mountain, 21º07.246′ N, 104º56.295′ E, 832 m, 24 October 2012, D. H. Vuong 2012102407 (holotype VNF!; isotypes IBSC!, VNF!, VNM!, XSNP!). Trees, 20–30 m tall, to 80 cm in diameter; bark gray and smooth, branches glabrous, with slightly raised lenticels. Terminal buds ovoid or ovoid-elliptic, 2–5 × 2–3 mm, glabrescent, fimbriate. Stipules narrowly lanceolate, glabrous, 6–7 × 1–1.5 mm, caducous. Petiole 0.3–0.7 cm, glabrous. Leaf blade elliptic, sometimes obovate-elliptic or oblong elliptic, 5–8 × 2–3 cm, papery firmness, adaxially glabrous, abaxially with tight, thin, brown thin-walled peltate trichomes, without non-glandular trichomes, base cuneate, margins entire, apex acute or acuminate; midvein adaxially slightly raised from base to middle but flat to slightly impressed from middle to apex; secondary veins 6–10 on each side of midvein, slender. Male inflorescence rachis pubescent. Female inflorescences 8–15 cm, rachis sparsely and shortly hairy, flower solitary per cupule, styles 3. Infructescence rachis 2–2.5 mm thick, glabrous, sparsely lenticellate. Cupule conical or subglobose, 2–2.5 cm in diameter outside and spines pubescent and with yellowish brown scales, inside dense brown villus, wall 0.5–1 mm thick and exterior visible through spines; spines 5–7 mm long, basally connate and transversely united across 4–5 rings. Nut 1 each cupule, conical, 1–1.5 cm in diameter, densely brown pubescent, 10–11 obviously ridges in cross section; scar concave, 0.8–1.2 cm in diameter. Distribution and ...