西域龙胆 xi yu long dan

Gentiana hyalina T. N. Ho; G. pygmaea C. B. Clarke (1883), not Regel & Schmalhausen (1812).

Annuals 1.5-3 cm tall. Stems ascending to erect, branched from base, glabrous. Leaves widely spaced; petiole tube 2-3 mm; leaf blade spatulate to obovate, 2.5-4.5 × 1-1.5 mm, shorter than internodes, base narrowed, margin membranous and smooth, apex rounded, midvein abaxially indistinct. Pedicel 2-6 mm, exserted from upper leaves, glabrous. Calyx tubular to narrowly obconic, 7-9 mm; lobes triangular, 1-1.2 mm, margin narrowly membranous and smooth, apex acute, midvein strongly keeled and decurrent into conspicuous wings of calyx tube. Corolla blue, tubular, 1.2-1.5 cm, 1.5-2 mm in diam. at throat; lobes ovate, 1.5-2 mm, margin entire, apex obtuse; plicae ovate, 1.2-1.5 mm, margin serrulate, apex obtuse. Stamens inserted at middle of corolla tube, equal; filaments 1-1.5 mm; anthers narrowly ellipsoid, 0.8-1 mm. Style 0.5-0.7 mm; stigma lobes semiorbicular. Capsules cylindric to narrowly ellipsoid, 8-10 mm, valves membranous and transparent; gynophore to 1.8 cm. Seeds light brown, ellipsoid, 0.8-1 mm. Fl. and fr. Aug-Sep.

* Alpine meadows; 4600-5300 m. Qinghai, W Xizang.