Gentiana viatrix H. Smith

Perennials 8-15 cm tall. Stems ascending, simple, papillate. Basal rosette leaves poorly developed; leaf blade triangular, 3-7 × 1-1.5 mm, membranous, apex acute. Stem leaves sessile, in whorls of 5 (or 6), larger toward apex, uppermost leaves surrounding calyx, base connate for 2-3 mm, margin smooth, apex obtuse, midvein distinct. Lower stem leaves withered at anthesis, linear-spatulate, 2-3 × 1-1.5 mm; middle to upper leaves linear to linear-lanceolate, 5-7 × 1.5-2 mm, apex acuminate. Flowers terminal, solitary, sessile, 5merous. Calyx tube narrowly obconic, 6-8 mm; lobes linear-spatulate, 4-4.5 mm, herbaceous, base narrowed, margin smooth, apex obtuse, midvein distinct. Corolla blue, with dark blue streaks, narrowly obconic, 3.5-5 cm; lobes broadly triangular, 2-3 mm, margin entire, apex obtuse with a caudate tip 1-2 mm; plicae broadly ovate, 1-1.5 mm, margin erose, apex obtuse. Stamens inserted at basal part of corolla tube; filaments 8-10 mm; anthers narrowly ellipsoid, 2-2.5 mm. Ovary narrowly ellipsoid, 0.9-1.1 cm; gynophore 1.1-1.5 cm. Style 5-7 mm; stigma lobes linear. Fl. Jul-Sep.

N and W Sichuan.

* Alpine meadows, forest margins; 3400-4800 m.

Gentiana viatrix là một loài thực vật có hoa trong họ Long đởm. Loài này được Harry Sm. ex C.Marquand mô tả khoa học đầu tiên năm 1937.

五叶龍膽（学名：Gentiana viatrix），又名五叶秦艽，为龙胆科龙胆属的植物，是中国的特有植物。分布在中国大陆的四川等地，生长于海拔3,400米至4,800米的地区，多生在山坡草地和林缘，目前尚未由人工引种栽培。