Description from Flora of China
Trees to ca. 3 m tall; bark yellow-brown; branchlets glabrous. Petiole 3-6 cm, glabrous; leaf blade ovate to narrowly ovate, 8-18 × 6-13 cm, abaxially densely cottony in vein axils, adaxially ± spotted, base obtuse to rounded, rarely cordate, margin entire to subundulate, apex acuminate to acute. Cymes opposite leaves, ca. 12 cm wide at anthesis. Pedicel 3-6 mm. Calyx cylindric, ca. 13 × 8 mm, leathery; lobes irregular, short. Corolla orange, funnelform, 3.4-4.5 cm; throat ca. 4 cm wide; lobes divaricate, orbicular. Drupes ovoid or obovoid, ca. 2.5 cm, with corky mesocarp, enclosed by enlarged persistent calyx. Fl. Jun.
Sandy, open woodland. Hainan (Nanhai Zhudao, Yaxian Xian) [India, Indonesia, Thailand, Vietnam; Africa (E coast), Pacific Islands].