红柯 hong ke

Quercus fenzeliana (A. Camus) Merrill.

Trees to 30 m tall. Young branchlets sulcate. Petiole 2-3 cm; leaf blade ovate, ovate-lanceolate, or obovate-elliptic, 10-18 × 3-6 cm, leathery, leaf blades of last year abaxially brownish gray to grayish and with adherent, waxy scalelike trichomes, base cuneate and decurrent on petiole, margin entire or undulate from middle to apex, apex caudate to shortly acuminate; secondary veins 7-10 on each side of midvein, usually impressed adaxially; tertiary veins abaxially obscure. Male inflorescences solitary or in a panicle; rachis pubescent. Female inflorescence ca. 15 cm; cupules solitary, scattered on rachis. Infructescence ca. 10 cm; rachis 3-4 mm thick. Cupule globose to depressed globose, 1.6-2.2 cm in diam., completely enclosing nut, wall ca. 1 mm thick; bracts triangular when young, fused into 6-8 concentric rings on mature cupules, squamose. Nut subglobose, ca. 1.5 cm in diam., apex puberulent, wall 0.5-1 mm thick; scar covering more than 2/3 of nut, convex. Fl. Feb-Apr, fr. Aug-Sep of following year.

* Broad-leaved evergreen forests, commonly in association with Dacrydium pectinatum and Dacrycarpus imbricatus var. patulus; 300-1000 m. Hainan