Description from Flora of China
Quercus caudatilimba Merrill, Sunyatsenia 2: 212. 1935; Pasania caudatilimba (Merrill) Chun.
Trees 15-25 m tall. Young branchlets sulcate. Petiole 3-4 cm; leaf blade broadly ovate to suborbicular, 7-14 × 3-8 cm, rigidly papery, abaxially with adherent, waxy scalelike trichomes, adaxially glabrous, base broadly cuneate and decurrent on petiole, margin entire, apex abruptly acute, shortly caudate, or rarely acuminate; secondary veins 6-10 on each side of midvein; tertiary veins abaxially slender, evident or not visible. Male inflorescences in a panicle, 6-10 cm. Female inflorescences solitary or in pairs, terminal on branches; cupules stalked, often solitary, scattered on rachis. Infructescences 5-10 cm; rachis ca. 4 mm thick. Cupule subglobose, 2.5-3 × 2-2.5 cm including stalk, enclosing 1/2-3/4 of nut, wall (0.5-)1 mm thick and crustaceous; bracts triangular, wartlike, apical ones reduced to scars. Nut depressed globose, 1.4-1.8 × 1.8-2.3 cm, glabrous, base flat, wall. ca. 1 mm thick; scar 1.2-1.4 cm in diam., concave. Fl. Oct-Dec, fr. Oct-Dec of following year.
* Broad-leaved evergreen forests; circa 700 m. SW Guangdong (Yangchun Xian), Hainan