Description from Flora of China
Bidaria longiretinaculata (Tsiang) P. T. Li.
Lianas to 1 m, hispid. Petiole 3-5 mm; leaf blade ovate, 1-2 × 0.8-1.8 cm, base cordate, apex acute; basal veins 5, prominent. Cymes 1.5-2.3 cm, (1-)3-5-flowered; peduncle 1-1.3 cm. Pedicel ca. 5 mm. Sepals ovate, hispid. Corolla white; tube ca. 3 mm; lobes oblong, ca. 2 mm, apex rounded or retuse; appendages absent, hair bands included. Gynostegium terete, reaching corolla throat; anthers as high as stigma head; pollinia oblong, retinaculum linear-oblong, longer than pollinia. Stigma head discoid, apex depressed. Follicles fusiform, ca. 3.5 × 1.3 cm, obtuse at both ends, glabrous. Fl. Jul-Sep.
* Bushland; 1000-2400 m. Guizhou, Sichuan, Yunnan.