Description from Flora of China
Crawfurdia trailliana Forrest; Gentiana helenii C. Marquand.
Stems twining, terete, glabrous, internodes 6-17 cm. Petiole 0.5-1 cm, slender; leaf blade elliptic to ovate, 4-7 × 2-4 cm, leathery, base rounded, margin entire, apex acuminate and caudate, veins 3-5. Inflorescences 1-flowered or cymes. Pedicel 1-15 cm; bractlets 1-3 pairs, lanceolate. Calyx sometimes pale purple, tubular; tube 2-2.5 cm, entire or rarely split on 1 side, apex with intracalycular membranes; lobes spreading to recurved, ovate-triangular to triangular, 3-4 × 2-3 mm. Corolla pale purple, funnelform, 6-8.5 cm; lobes ovate-triangular, 1-1.7 cm × 6-12 mm, apex acuminate; plicae broadly triangular, 2-4 × ca. 5 mm, oblique, margin irregularly crenulate. Stamens inserted at middle of corolla tube; filaments linear-subulate, 1.5-1.8 cm; anthers ellipsoid, 5-7 mm. Nectaries ovate. Style linear, 2.5-3 cm; stigma lobes linear. Capsules ellipsoid, ca. 3 cm; gynophore less than 5 mm. Seeds light brown, triquetrous, 2-2.5 mm, broadly winged along edges. Fl. and fr. Oct-Dec.
Meadow slopes, scrub, scattered forests in valleys; 1500-2800 m. SE Xizang, NW Yunnan [India, Myanmar].