叶萼龙胆 ye e long dan

Perennials 3-12 cm tall. Roots few, slender. Stolons to 5 cm. Stems ascending to erect, simple, glabrous. Leaves crowded toward base of stem. Stem leaves 3-5 pairs, widely spaced; petiole 5-8 mm; leaf blade obovate, 0.6-2.6 × 0.4-1.6 cm, base decurrent into petiole, apex rounded and emarginate, veins 1-3. Flowers terminal, solitary, sessile. Calyx pale yellow-green; tube broadly tubular, 3.5-4.5 mm; lobes linear to lanceolate, 3-4 mm, subequal, apex obtuse, veins indistinct. Corolla blue, with dark blue stripes, broadly tubular to tubular-campanulate, 3-4.7 cm; lobes ovate to broadly ovate, 3-4 mm, margin entire or erose, apex obtuse; plicae horizontally truncate, margin erose. Stamens inserted at basal part of corolla tube; filaments 1.2-1.4 cm; anthers linear to ellipsoid, 2.5-5 mm. Style 4-5 mm, linear; stigma lobes suborbicular. Capsules ovoid-ellipsoid, 2.3-2.5 cm; gynophore to 4.6 cm. Seeds compressed, orbicular, 1.4-1.6 mm. Fl. and fr. Jun-Oct.

Grassland and rocky slopes, stony pastures, scrub; 3000-5200 m. SE Xizang, NW Yunnan [Bhutan, India, N Myanmar, Nepal, Sikkim].