Description from Flora of China
Rhizomes stout. Stems twining, terete, striate, internodes 5-14 cm. Basal leaves several pairs; leaf blade scalelike, less than 1 cm. Middle to upper stem leaves sessile or with petiole to ca. 2 mm; leaf blade ovate to broadly ovate, 3-7 × 2-4.5 cm, leathery, base rounded, margin scabrous and ciliate, apex acuminate and caudate, veins 5-7. Inflorescences 2flowered or cymes. Pedicel 1-8 cm; bractlets ovate, 1-2 cm. Calyx campanulate; tube ca. 1 cm, split on 1 side from apex to middle, narrowly winged along veins, apex with a transparent intracalycular membrane; lobes ovate-triangular, 3-5 × ca. 1.5 mm, base connate into a cupular limb, apex caudate. Corolla pale blue-purple, campanulate, ca. 3 cm; lobes ovate-triangular, ca. 3 × 3-4 mm, apex acute; plicae truncate, ca. 2 mm wide, margin entire or erose. Stamens inserted at basal part of corolla tube; filaments subulate, 1-1.2 mm; anthers sagittate, ca. 2 mm. Nectaries elliptic, ca. 1.2 mm. Gynophore ca. 7 mm, stout. Style cylindric, ca. 2 mm; stigma lobes linear. Immature capsules ellipsoid, compressed, ca. 1.6 cm, included in corolla. Seeds ellipsoid, ca. 2 mm, broadly winged. Fl. and fr. Oct-Nov.
* Grassland slopes; 2900-3300 m. NW Yunnan.