石屏柯 shi ping ke

Lithocarpus dealbatus (J. D. Hooker & Thomson ex Miquel) Rehder var. yunnanensis A. Camus.

Trees 15-25 m tall; branchlets of current year and leaf blades abaxially densely pubescent. Branchlets of last-year growth glabrescent, conspicuously lenticellate. Petiole 1-1.5 cm; leaf blade oblong, 12-20 × 4-7 cm, leathery, abaxially covered with dark gray, minute, waxy scalelike trichomes, base cuneate, margin entire, apex shortly acuminate; midvein slightly raised and pilose; secondary veins 10-14 on each side of midvein, adaxially impressed; tertiary veins abaxially ± conspicuous. Male inflorescences paniculate, to 27 cm; rachis pubescent. Female inflorescences 2-4 congested above middle of branches, 5-15 cm; cupules in clusters of ca. 3. Infructescence rachis 5-8 mm thick. Cupule turbinate, 2-2.4 × 1.8-2.6 cm, broadest slightly apical from middle, enclosing more than 1/2 of nut; bracts triangular to rhomboid, from base to middle of cupule fused with wall, grayish puberulent and with waxy scalelike trichomes. Nut subglobose, 1.5-1.8 × 1.6-2.6 cm, with appressed minute hairs, apex flat or concave; scar covering 1/2-2/3 of nut, convex. Fl. May-Jun, fr. Oct-Nov of following year.

* Broad-leaved evergreen forests; 2000-2400 m. S Yunnan