Tripterospermum coeruleum (Hand.-Mazz.) H. Smith

Stems twining, terete, 2-3 mm in diam. Petiole 5-10 mm, slender; leaf blade lanceolate to ovate-lanceolate, 6-7 × 1-2.5 cm, base rounded, margin entire or sometimes slightly revolute, apex acuminate to sometimes caudate, veins 3. Inflorescences 1-3flowered cymes; bracts 1-3 pairs, ovate, to 1 cm. Pedicel 3-10 mm. Calyx campanulate; tube 1-1.4 cm, broadly winged; lobes linear-lanceolate, 5-6 mm. Corolla blue, narrowly campanulate, 3.5-4 cm; lobes ovate-triangular, 5-6 mm, apex acuminate and caudate; plicae semiorbicular, 1.5-2 mm, margin entire or crenulate. Filaments linear, 1.8-2 cm; anthers ellipsoid, ca. 1.5 mm. Disc ca. 1 mm. Style 8-10 mm. Capsules ellipsoid to obovoid-ellipsoid, ca. 3 cm, included in persistent corolla; gynophore less than 5 mm. Seeds light brown, discoid to compressed triquetrous, 2-2.5 mm, broadly winged along ridges. Fl. and fr. Sep-Oct.

SW Sichuan.

* Scrub, bamboo thickets; 2500-3100 m.

Crawfurdia coerulea Handel-Mazzetti, Symb. Sin. 7: 950. 1936; Gentiana cyanea C. Marquand.

Tripterospermum coeruleum là một loài thực vật có hoa trong họ Long đởm. Loài này được (C. Marquand) Harry Sm. miêu tả khoa học đầu tiên năm 1965.

盐源双蝴蝶（学名：Tripterospermum coeruleum）为龙胆科双蝴属下的一个种。