犁耙柯 li pa ke

Quercus silvicolarum Hance, J. Bot. 22: 229. 1884; Lithocarpus nariakii (Hayata) Sakaki ex Kudo; Pasania silvicolarum (Hance) Schottky; Q. nariakii Hayata; Synaedrys silvicolarum (Hance) Koidzumi.

Trees to 20 m tall. Branchlets tawny pilose. Petiole 1-1.5 cm; leaf blade elliptic to obovate-elliptic, 10-20 × 3.5-6 cm, papery, abaxially with scalelike glands and tawny pilose along side, base cuneate and decurrent on petiole, margin entire or undulate on apical part, apex acute to narrowly acuminate; secondary veins 10-12 on each side of midvein; tertiary veins slender, inconspicuous to conspicuous. Male inflorescences in a panicle, rarely solitary; rachis sparsely pubescent. Female inflorescences 8-20 cm; cupules in clusters of 3-5. Infructescence rachis 1-1.2 cm thick. Cupule cupular, 0.8-1.5 × 2-3.5 cm, enclosing ca. 1/2 of nut, wall 1-1.5 mm thick and basally ± woody; bracts dark reddish brown, fused with wall of cupule or sometimes only subulate apex free, broadly triangular to rhomboid. Nut depressed globose, 1.2-1.6 × 2-2.5(-3) cm, glabrous, base flat, apex rounded or flat, wall 0.5-1 mm thick; scar 1.4-1.8(-2.5) cm in diam., concave. Fl. Mar-May, fr. Jul-Sep of following year.

Broad-leaved evergreen forests; below 1200 m. SW Guangdong, SW Guangxi, Hainan, SE Yunnan [NE Vietnam]