Swertia davidii Franch.

Perennials (5-)15-60 cm tall. Rhizomes slender, with few rootlets. Stems ascending to erect, subquadrangular, narrowly winged on angles, branched. Basal and lower stem leaves petiolate; leaf blade linear-elliptic, 1.3-7 cm × 2-5 mm including petiole, base narrowed, apex obtuse, veins 1-3. Middle to upper stem leaves sessile or short petiolate; leaf blade linear, linear-lanceolate, or linear-elliptic, 1.5-3 cm × 1-3 mm, base obtuse, apex acuminate to obtuse, midvein distinct. Inflorescences panicles of cymes, many flowered, to 36 cm. Flowers 4merous. Pedicel erect, 0.5-3.5 cm, slender. Calyx tube 1-1.5 mm; lobes linear-lanceolate, 5-7 mm, apex acuminate, veins 1-3. Corolla pale blue, with blue veins, 1.2-1.5 cm in diam., tube 1-1.5 mm; lobes ovate-lanceolate to ovate, 7-11 mm, apex acuminate. Nectaries 2 per corolla lobe, radially elongated, with a narrow scale and raised margin with many long fimbriae. Filaments 5-7 mm; anthers ellipsoid, ca. 1 mm. Style indistinct; stigma lobes capitate. Capsules ellipsoid, 0.8-1.2 cm. Seeds subglobose; seed coat warty. Fl. Sep-Nov.

W Hubei, W Hunan, E Sichuan, Yunnan (Jingdong Xian).

* Beside streams, wet places, meadows, mixed forests; 900-1200 m.

Swertia longipes Franchet.

Swertia davidii là một loài thực vật có hoa trong họ Long đởm. Loài này được Franch. miêu tả khoa học đầu tiên năm 1887.

川东獐牙菜（学名：Swertia davidii），为龙胆科獐牙菜属下的一个植物种。