四列龙胆 si lie long dan

Annuals 2-3 cm tall. Stems ascending to erect, 2-5-branched from base, glabrous. Leaves overlapping, 4ranked; petiole tube 0.8-1.2 mm, papillate on margin and abaxially; leaf blade ovate, 3-7 × 1.5-2 mm, margin cartilaginous and ciliolate, apex acute, midvein prominent. Flowers sessile. Calyx tubular, 7-10 mm; lobes triangular, 2-2.5 mm, margin narrowly membranous and smooth, apex obtuse, midvein prominent. Corolla blue-purple, tubular, 1.2-1.7 cm; lobes ovate-orbicular, 2-2.5 mm, margin entire, apex rounded; plicae oblong to broadly ovate, 1.5-2 mm, margin erose, apex obtuse. Stamens inserted at basal part of corolla tube, equal; filaments 1.5-2.5 mm; anthers narrowly ellipsoid, 1.5-2 mm. Ovary ellipsoid, 3-4 mm; gynophore 1-1.5 mm. Style 0.8-1 mm; stigma lobes broadly oblong. Fl. Aug-Sep.

Alpine meadows; 4200-5300 m. S Xizang [Sikkim].