Yiyang Duosui Lithocarpus

Yiyang Duosui Lithocarpus

Yiyang Duosui Lithocarpus is a geographical indication certification trademark.

　　Belongs to the section: Lithocarpus Bl Family: Fagaceae Chinese name: 多穗石栎 Latin name: Lithocarpus polystachya Literature source: Lithocarpus polystachyus (Wall.) Rehd. (1919); A. Camus (1952–54); Iconographia Cormophytorum Sinicorum (1972)*; Xu & Ren (1976)*. Quercus polystachya Wall. (1828), nom. nud. A. DC. (1864) descr.; Hook. f. (1888); King (1889); Pasania polystachya (Wall.) Oersted (1873); Schottky (1912); Synaedrys polystachya (Wall.) Koidz. (1916). Description: A tree, 7–15 m tall. Branchlets glabrous. Leaves oblong-elliptic or obovate-oblong, 9–12 (–20) cm long, 3–5 (–8) cm wide, acuminate or caudate at apex, cuneate at base, entire, abaxially with grayish-white scales, glabrous, adaxial side with flat lateral veins, abaxial side slightly raised, 10–12 pairs, slightly brownish; petiole 1.5–2 cm long, glabrous. Female inflorescences usually 2–3 clustered at branch tips, 10–15 (–20) cm long, with 3 female flowers in a cluster. Fruit raceme up to 20 cm long, fruits densely arranged, all 3 female flowers developing into fruits. Cupule disc-shaped, covering the base of the nut, 7–8 (–13) mm in diameter, 2–4 mm high; bracts triangular, adnate. Nut ovoid, 1–1.5 cm in diameter, 1.2–1.6 cm high, deeply sunken hilum, 5–7 mm in diameter. Distribution and habitat: Found in central and western Yunnan. Distributed in provinces and regions south of the Yangtze River basin in China. Also present in India and Thailand.