Tripterospermum discoideum (C. Marquand) Harry Smith

Stems terete, 1-3 mm in diam. Petiole 3-10 mm; leaf blade lanceolate to ovate-lanceolate, 3-10 × 1.5-5.5 cm, membranous, base rounded to subcordate, margin entire and sometimes slightly revolute, apex ± short acuminate to acuminate-caudate, veins 3-5. Inflorescences 1-5-flowered cymes; bracts 1-5 pairs, lanceolate to triangular, 2-6(-10) mm. Pedicel 3-10 mm. Calyx campanulate; tube 1-1.4 cm, wingless or narrowly winged; lobes linear-subulate to linear-lanceolate, 2-4 mm. Corolla pale blue, blue, blue-purple, or purple, narrowly campanulate to campanulate, 3-5 cm; lobes ovate-triangular, 6-9 mm, apex acuminate; plicae semiorbicular, 1.5-3 mm, margin entire or crenate. Filaments linear to linear-subulate, 1.3-2.2 cm; anthers ellipsoid to ovoid, ca. 1.5 mm. Disc 1-5 mm. Style 8-11 mm. Capsules ellipsoid, 2-2.5 cm × 7-8 mm, partially exserted from persistent corolla; gynophore 1-1.5 cm. Seeds light brown, orbicular, compressed, 2-2.5 × 0.7-0.8 mm; wings discoid. Fl. and fr. Aug-Dec.

W Hubei, S Shaanxi, E Sichuan.

* Grassland slopes; 600-2000 m.

Gentiana discoidea C. Marquand, Bull. Misc. Inform. Kew 1931: 72. 1931; G. caudata C. Marquand.

Tripterospermum discoideum 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.

湖北双蝴蝶（学名：Tripterospermum discoideum），为龙胆科双蝴属下的一个植物种。