Stems slender, terete, long creeping on ground, producing rootlets from nodes. Petiole 0.5-1.5 cm, slender; leaf blade ovate to cordate, 0.7-1.7 × 0.6-1.6 cm, base rounded to cordate, somewhat decurrent, margin entire, apex acute, veins 3-5. Flowers solitary; bracts 1-3 pairs, ovate, ca. 5 mm. Pedicel 2-3 mm. Calyx campanulate; tube 6-7 mm, winged; lobes linear to oblanceolate, (5-)7-8 mm, base contracted, apex acuminate. Corolla purple, campanulate, ca. 3.5 cm; lobes ovate-triangular, ca. 5 mm, apex acute; plicae semiorbicular, ca. 2 mm, margin crenulate. Filaments linear, 1.5-2 cm; anthers ellipsoid, ca. 1 mm. Disc ca. 1 mm. Ovary narrowly ellipsoid, ca. 8 mm. Style ca. 1.8 cm, exserted from corolla. Berries spindle-shaped, subsessile to gynophore 4-7 mm. Fl. Oct.
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