Description from Flora of China
Plants glabrous except for corolla. Stems stout, to 3 m. Petiole 1-2 cm; leaf blade oblong to ± elliptic or lanceolate, 10-13 × 2.5-4.5 cm, leathery or thick papery when dry, base cuneate or broadly so, apex caudate; lateral veins ca. 10 pairs, nearly at right angles to midvein. Pseudumbels terminal and extra-axillary, globose, many flowered, shorter than leaves; peduncle 1.5-2.5 cm. Pedicel 2-2.5 cm. Sepals elliptic, 1.5-2 × 1.2-1.4 mm, obtuse. Corolla yellow, ca. 1 cm in diam., often reflexed; lobes triangular-ovate, puberulent inside. Corona lobes short, very thick, outer angle obtuse or acute, inner angle ending in an erect or recurved spur up to as long as anther tips. Follicles linear-lanceolate in outline, 13-15 cm × 6-10 mm. Seeds oblong or oblong-elliptic, ca. 5 mm; coma ca. 3 cm. Fl. May-Sep, fr. Oct-Dec.
Moist forests; 500-2600 m. Guangxi, Guizhou, Hainan, Xizang, Yunnan [Bhutan, Cambodia, India, Laos, Myanmar, Nepal, Thailand, Vietnam].