黑果青冈 hei guo qing gang

Quercus chevalieri Hickel & A. Camus, Ann. Sci. Nat., Bot., ser. 10, 3: 380. 1921; Cyclobalanopsis nigrinux Hu.

Trees to 20 m tall. Branchlets slender and sulcate, with a whitish waxy layer by 2nd year. Petiole 5-8(-12) mm; leaf blade green, elliptic, obovate-elliptic, or lanceolate, 6-11 × 2-4 cm, subleathery, puberulent or glabrous when young, base cuneate, margin entire to remotely repand and serrulate apically, apex caudate; midvein adaxially impressed; secondary veins 8-11 on each side of midvein, slender, evident. Infructescences 2-4 cm, with 2-5 fruit. Cupule cupular, 0.5-1.2 × 0.8-1.8 cm, enclosing 1/3-1/2 of nut, outside glabrous, inside brown sericeous, wall less than 1 mm thick; bracts in 5-7(-9) rings, margins dentate. Nut ovoid to oblong-ellipsoid, 1-1.5(-2) × 0.6-0.8 (-1.5) cm, glabrous; scar ca. 5 mm in diam., flat. Fr. Dec.

Mixed mesophytic and broad-leaved evergreen forests; 600-1500 m. Guangdong, Guangxi, Yunnan [Vietnam]