Lianas to 2 m. Branches terete, slender, minutely pubescent along 2 lines. Leaves remote; petiole 3-5 mm; leaf blade lanceolate to linear-lanceolate, 3-6 cm × 7-10 mm, glabrescent; lateral veins flat, obscure. Cymules umbel-like, few flowered, sometimes 2 close together; peduncle 5-8 mm. Pedicel threadlike, 5-8 mm, minutely puberulent. Sepals ovate-elliptic. Corolla lobes 1/3-1/2 as long as tube, acute, erect, glabrous. Corona ringlike, rim shallowly 5-cleft. Anthers oblong-rhomboid, apex broadly triangular, subacute, inflexed; pollinia oblong, caudicles as long as pollinia, retinaculum half as long as pollinia. Follicles narrowly lanceolate, 5-7 cm × ca. 4 mm. Seeds linear, ca. 7 × 2 mm; coma ca. 1 cm. Fl. May, fr. Oct.

* Mountain forests, roadsides, bottom of cliffs; ca. 1600 m. Gansu, Shaanxi (In kia p'u (Lao y shan))