Gentiana caelestis (C. Marquand) Harry Smith

Perennials 5-8 cm tall. Stems ascending, simple, with several shoots not flowering, glabrous. Basal rosette leaves poorly developed; leaf blade lanceolate, 0.5-2 cm × 2-4 mm, base connate for 2-4 mm, margin smooth or scabrous, apex acuminate, midvein distinct. Stem leaves larger toward apex, uppermost surrounding calyx; leaf blade base obtuse and connate for 2-3 mm, margin smooth or scabrous, apex acute, midvein distinct. Lower to middle stem leaves ovate, 3-8 × 2-4 mm; upper leaves linear-elliptic to elliptic, 1.1-1.8 cm × 2-4 mm. Flowers terminal, solitary, sessile. Calyx tube narrowly obconic, 1-1.3 cm; lobes green, linear-elliptic to elliptic, 8-11 mm, base slightly narrowed, margin smooth or scabrous, apex obtuse, midvein distinct. Corolla pale blue, sometimes with a few dark blue streaks in tube, tubular-campanulate, (3.5-)4-5 cm; lobes ovate to triangular, 5-7 mm, margin entire, apex acute to obtuse; plicae ovate, 2-3 mm, margin entire or denticulate, apex obtuse. Stamens inserted just below middle of corolla tube; filaments 1-1.3 cm; anthers narrowly ellipsoid, 2.5-3 mm. Ovary narrowly ellipsoid, 1-1.2 mm; gynophore 1.4-1.8 cm. Style 4-5 mm; stigma lobes linear. Fl. Aug-Sep.

SW Sichuan, SE Xizang, NW Yunnan [NE Myanmar].

Grassland slopes, alpine meadows, scrub, roadsides in valleys; 2600-4500 m.

Gentiana veitchiorum Hemsley var. caelestis C. Marquand, Bull. Misc. Inform. Kew 1931: 84. 1931; G. ampla Harry Smith.

Gentiana caelestis là một loài thực vật có hoa trong họ Long đởm. Loài này được (C.Marquand) Harry Sm. mô tả khoa học đầu tiên năm 1936.

天蓝龙胆（学名：Gentiana caelestis）为龙胆科龙胆属的植物，是中国的特有植物。分布于中国大陆的西藏、云南、四川等地，生长于海拔2,600米至4,500米的地区，见于山坡草地、高山草甸、灌丛中和山沟路旁，目前尚未由人工引种栽培。