Perennials 20-40 cm tall. Caudex blackish, stout, with few slender fibrous rootlets. Stems ascending to erect, slender, striate, branched from base. Leaves mostly basal; petiole short; leaf blade oblong, broadly obovate, or suborbicular, 1.5-6.5 × 1-3.5 cm, base narrowed, apex obtuse to rounded, veins 3-5. Stem leaves sessile, ovate, 1.3-2 × 0.6-1.3 cm, base rounded, apex acute, veins 1-3. Inflorescences panicles of cymes, many flowered, narrow. Flowers 4merous. Pedicel erect, to 2.5 cm, slender. Calyx tube ca. 0.5 mm; lobes narrowly elliptic, 6-8 mm, apex acute; veins 1-3, indistinct. Corolla dark purple, 3-5 mm in diam., tube ca. 0.5 mm; lobes ovate, 6-8 mm, apex acute and caudate. Nectaries 2 per corolla lobe, radially elongated, with a narrow scale, and raised margin with many long fimbriae. Filaments 4-4.5 mm; anthers yellow, ellipsoid, ca. 1.2 mm. Style distinct, linear, ca. 2 mm; stigma lobes capitate. Capsules ovoid, ca. 5 mm. Seeds light brown, subglobose, ca. 0.3 mm. Fl. Jul.

* Forests. Yunnan (Lushui Xian).