三角叶龙胆 san jiao ye long dan

Annuals 4-6 cm tall. Stems ascending to erect, weak, 1 or 2 × dichotomously branched from base or rarely simple, glabrous. Basal leaves withered at anthesis; petiole 1-2 mm, papillate adaxially and on margins; leaf blade ovate to ovate-triangular, 4-10 × 2.5-4 mm, abaxially glabrous, adaxially densely and minutely papillate, margin densely ciliate, apex acute, veins 1-3, distinct, and slender. Stem leaves spreading; petiole tube 1-1.5 mm, papillate on margin and abaxially; leaf blade ovate-triangular to triangular, 2.5-5 × 2-2.5 mm, much shorter than internodes, abaxially glabrous, adaxially densely and minutely papillate, base rounded to cordate, margin ciliate, apex acute; veins 1-3, distinct, slender. Flowers few. Pedicel 0.9-2 cm, glabrous. Calyx campanulate, 5.5-6 mm; lobes filiform-subulate, 1.5-3 mm, base 1-1.5 mm wide, apex acuminate, midvein prominent. Corolla blue, campanulate, 9-10 mm; lobes ovate to ovate-orbicular, 2.5-3.5 mm, margin erose-undulate, apex obtuse; plicae ovate, 2-2.5 mm, margin clavate fringed with expanded tips. Stamens inserted at basal part of corolla tube, equal; filaments 2-3 mm; anthers ellipsoid, 0.5-0.7 mm. Style 0.8-1 mm; stigma lobes oblong. Capsules obovoid, 3.5-4 mm; gynophore to 4 mm. Seeds brown, ellipsoid, 1.3-1.6 mm. Fl. and fr. Jul-Aug.

* Grassland slopes; 3300-3700 m. SW Sichuan, NW Yunnan.