窄叶柯 zhai ye ke

Trees to 10 m tall, glabrous except for inflorescences. Branchlets blackish when dry. Petiole rarely to 1 cm, base ± thickened; leaf blade oblong to lanceolate, 5-13 × 1.2-3.5 cm, thickly papery, abaxially ± glaucous and with scalelike glands, base cuneate and decurrent on petiole, margin entire, apex shortly acuminate to obtuse; secondary veins 12-16 on each side of midvein, slender, evident, irregularly spaced, sometimes ramified far from margin; tertiary veins abaxially very slender, evident or not visible. Male inflorescences solitary or in a panicle; rachis glabrous or subglabrous. Female inflorescences in clusters of 2-6 at apex of branches; rachis ± puberulent, with tawny scalelike glands; cupules in clusters of ca. 3. Infructescence rachis 4-7 mm thick. Cupule plate-shaped, 1-3 mm × 1-1.6 cm, covering only base of nut, wall 0.5-1 mm thick; bracts imbricate, triangular, very small, appressed, with puberulent scalelike glands. Nut depressed globose to rarely conical, 1-1.8 × 1.4-2 cm, sometimes ± white farinose, apex ± flat with a concave center to rarely shortly pointed, wall ca. 1 mm thick; scar 5-8 mm in diam., concave. Fl. Jun-Aug, fr. Aug-Oct of following year.

* Secondary forests on dry slopes; 1500-2400 m. W Guizhou, C to E Yunnan