Annuals 2-4 cm tall. Stems prostrate to ascending, branched from base, glabrous. Basal leaves withered at anthesis; petiole 0.5-1.5 mm; leaf blade broadly ovate to ovate-orbicular, 4-6 × 3-4 mm, margin cartilaginous, apex rounded and mucronate, midvein prominent. Stem leaves 3-7 pairs; petiole tube 1-1.5 mm; leaf blade 3.5-5 × 1-1.5 mm, shape very variable, linear, linear-lanceolate, oblong, or ovate, margin broadly membranous, apex acuminate to obtuse, midvein abaxially prominent. Flowers few, subsessile. Calyx narrowly obconic, 6-7 mm, tube membranous; lobes triangular, 1.5-2.5 mm, margin broadly membranous, apex acute and apiculate, midvein prominent. Corolla blue, with short dark blue lines in throat, funnelform, 1-1.2 cm; lobes ovate, 1.5-2 mm, margin entire, apex acute; plicae ovate, 0.5-1 mm, margin entire, apex obtuse. Stamens inserted at middle of corolla tube, equal; filaments 1.5-2 mm; anthers ellipsoid, 0.6-0.8 mm. Style 0.5-1 mm; stigma lobes linear. Capsules narrowly obovoid, 3-4 mm; gynophore to 1.3 cm, slender. Seeds light brown, ellipsoid, 0.6-0.8 mm. Fl. and fr. Jul-Oct.
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