Beaumontia fragrans Pierre ex Pitard.

Lianas evergreen, woody, to 20 cm. Branchlets pale gray or dark brown, sparsely to densely rusty pubescent when young, glabrous when older. Petiole 1-3 cm; leaf blade obovate, narrowly obovate, or broadly elliptic, 10-30 X 3.5-15 cm, glabrous to pubescent abaxially; lateral veins 11-18 pairs. Cymes 12-20 cm, 6-12-flowered, pubescent; peduncle 3-9 cm. Pedicel 3-5 cm. Sepals pale green, elliptic, 2.7-4.5 cm, sparsely pubescent on both surfaces. Corolla white, broadly campanulate; tube 4-6.5 cm, cylindric proximally, glabrous inside; limb ca. 5 5 cm, abruptly constricted at base; lobes ovate or tongue-shaped, 1.9-3 cm, apex acute. Stamens yellow or orange; filaments 1.5-2.5 cm. Ovary pubescent. Style to 4 cm, pubescent. Follicles oblong, 14-18 X 3-5 cm. Seeds narrowly ellipsoid, ca. 2 cm, coma 3-8 cm. Fl. spring-summer.

The latex is used as an arrow poison.

Mixed forests, montane thickets, river banks; 1000-1500 m. S Yunnan (Menghai) [Cambodia, Laos, Malaysia, Thailand, Vietnam]