天蓝龙胆 tian lan long dan

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

Grassland slopes, alpine meadows, scrub, roadsides in valleys; 2600-4500 m. SW Sichuan, SE Xizang, NW Yunnan [NE Myanmar].