滇南青冈 dian nan qing gang

Quercus austroglauca (Y. T. Chang ex Y. C. Hsu & H. W. Jen) Y. T. Chang.

Trees to 10 m tall. Branchlets, glabrous, lenticellate; lenticels brownish, oblong to rounded. Petiole 1.5-2.5 cm, adaxially sulcate, glabrous; leaf blade oblong-elliptic to ovate-lanceolate, 10-14 × 3.5-4.5 cm, abaxially whitish and with prostrate simple hairs or glabrous, base cuneate to slightly oblique, margin with awnlike and incurved serrations apically, apex acuminate; secondary veins 10-12 on each side of midvein; tertiary veins abaxially conspicuous. Infructescences 4-5 cm, with 2 or 3 fruit. Cupule bowl-shaped, ca. 8 mm × 1-1.8 cm, enclosing ca. 1/2 of nut, outside pale grayish brown tomentose, walls ca. 1 mm thick; bracts in 7 rings, margin of apical 1 or 2 entire, others dentate. Nut broadly ovoid, 2-2.2 cm, apex conically acuminate; scar ca. 1 cm in diam., flat; stylopodium persistent, conspicuous, pale grayish brown tomentose, with 4 or 5 glabrous rings.

* Broad-leaved evergreen forests in mountains; 800-1500 m. SE Yunnan (Xichou Xian)