Description from Flora of China
Beaumontia campanulata Pitard, not K. Schumann.
Lianas to 10 m. Branchlets dark brown, densely to sparsely pubescent. Petiole 1.5-3 cm; leaf blade obovate or oblong, 10-21 X 5.5-12 cm, glabrous or densely hairy along veins adaxially, puberulent abaxially; lateral veins 11-14 pairs. Cymes 14-17 cm, 5-9-flowered, minutely tomentose; peduncle 1-2.5 cm. Flowers fragrant; pedicel 2-3 cm. Sepals narrowly elliptic, 1.5-2.5 cm X 3-6 mm, minutely tomentose on both sides. Corolla white, ca. 5 cm in diam.; tube 7-10 cm, cylindric proximally, narrowly campanulate distally, puberulent on both surfaces; lobes broadly ovate, 2-3 cm, apex acute or acuminate. Stamens included; filaments 4.5-5 cm; disc cup-shaped. Ovary and style puberulent. Style 6-7 mm. Follicles oblong, ca. 29 3.5 cm. Seeds narrowly ellipsoid, 1.6-2.3 cm, coma ca. 5.5 cm. Fl. Mar-May.
Montane forests, valley brushwoods; 800-1500 m. SW Guangxi, S Yunnan [Vietnam].