Annuals 2-3.5 cm tall. Stems ascending to erect, branched from base, glabrous. Basal leaves with petiole 1-2 mm; leaf blade ovate to ovate-orbicular, 3-4 × 1.4-1.6 mm, margin cartilaginous and smooth, apex obtuse to rounded and cuspidate, midvein distinct. Stem leaves with petiole tube 1.5-3 mm; leaf blade linear to linear-lanceolate, 4-6 × 1-1.2 mm, larger toward apex, margin narrowly membranous and smooth, apex acuminate, midvein prominent. Pedicel 2-3 mm, surrounded by upper leaves, glabrous. Calyx tubular to narrowly obconic, 1.1-1.4 cm; lobes triangular, 2-2.5 mm, narrow, apex acute, midvein prominent. Corolla dark blue, blackish in throat, salverform to funnelform, 1.8-2 cm; lobes ovate, 2.5-3 mm, margin entire, apex obtuse; plicae ovate, 2-2.5 mm, margin serrulate, apex obtuse. Stamens inserted at apical part of corolla tube, equal; filaments 1.2-1.5 mm; anthers ellipsoid, 1-1.2 mm. Ovary ellipsoid, 6-7 mm; gynophore ca. 4 mm. Style 2-2.5 mm; stigma lobes semiorbicular. Capsules cylindric to narrowly ellipsoid. Fl. and fr. Aug-Sep.
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