丝瓣龙胆 si ban long dan

Perennials 10-20 cm tall, with short slender stolons. Stems ascending to erect, slender, simple or few branched, glabrous. Basal leaves withered at anthesis. Petiole 1.5-2.5 mm; leaf blade ovate-lanceolate to ovate, 3-6 × 1.5-3 mm, abaxially glabrous, adaxially densely and minutely papillate, base rounded to cordate, apex acuminate, veins 1-3, distinct, and slender. Stem leaves spreading, much shorter than internodes. Flowers few. Pedicel slender, 1-3 cm, glabrous. Calyx narrowly obconic, 5-6 mm; lobes filiform to filiform-subulate, 2-3 mm, base 1-1.5 mm wide, margin narrowly membranous, apex acuminate, midvein prominent. Corolla violet, inside with dark blue spots, obconic, 1.2-1.5 × 0.9-1 cm; lobes linear, 1.5-1.8 mm, base ca. 1 mm, margin entire, apex obtuse; plicae broadly oblong, 1.5-1.8 × 3-4 mm, slightly 2cleft, margin of both segments filiform fringed. Stamens inserted at basal part of corolla tube, equal; filaments 4-5 mm; anthers narrowly ellipsoid, 0.8-1 mm. Ovary ellipsoid, 3-3.5 mm; gynophore ca. 4.5 mm, slender. Style 0.8-1 mm; stigma lobes oblong. Fl. Sep.

Grassland slopes; 3300-4000 m. NW Yunnan [NE Myanmar].