白枝青冈 bai zhi qing gang

Quercus albicaulis Chun & W. C. Ko in Chun & F. C. How, Acta Phytotax. Sin. 7: 33. 1958.

Trees to 30 m tall. Branchlets whitish, glabrous, cylindric when young, minutely sulcate and with papillate lenticels with age. Petiole 2-3.5 cm, glabrous; leaf blade oblong-elliptic, ovate, ovate-lanceolate, or lanceolate, 10-15(-18) × 3-6(-8) cm, subleathery, pruinose brown pubescent, glabrescent, base rounded to cuneate, decurrent along veins, and oblique, margin entire or shallowly crenate, apex long acuminate to caudate but sometimes shortly acuminate; midvein adaxially slightly impressed; secondary veins 6-8 on each side of midvein. Female inflorescences 2-3 cm. Infructescence rachis whitish, glabrous. Cupule bowl-shaped, 2-3 cm in diam., enclosing 1/3-1/2 of nut, outside pale brown puberulent; bracts in 6-8 rings, margin entire or middle ones crenulate. Nut oblong-ellipsoid, ca. 4 × 2-3 cm, glabrous; scar rounded; stylopodium persistent, umbonate. Fl. Oct, fr. Nov-Dec of following year.

* Mixed mesophytic forests; 200-600 m. Hainan (Ya Xian)