海南山龙眼 hai nan shan long yan

Shrubs or trees, 2-12(-18) m tall; glabrous. Leaves alternate or 3 or 4, ± verticillate; petiole subsessile, 1-3(-6) mm; leaf blade broadly oblanceolate to obovate-oblong, 11-25 × 3.5-8 cm, papery, base cuneate or obtuse, margin serrate on apical half; secondary veins 7 or 8(-12) on each side of midvein, abaxially raised; reticulate veins distinct on both surfaces. Inflorescences axillary, 10-23 cm, glabrous; bracts of flower pairs deltoid, ca. 1 mm; floral bracts less than 0.5 mm. Pedicels 3-5 mm, basally connate. Perianth whitish, 1.5-2.2 cm, glabrous. Anthers 2-3 mm. Hypogynous glands connate into a 4-toothed ring. Ovary glabrous. Fruit brownish, ellipsoid, apex markedly beaked, 3-5 × 2.2-4 cm; pericarp 1-1.5 mm thick, woody. Fl. Apr-Aug, fr. Nov-Mar.

Forests or secondary forests, mountain slopes, along streams; 100-1500 m. E Guangdong, E to SE Guangxi, Hainan, SE Yunnan [Laos, Thailand, N Vietnam].