Annuals 8-15 cm tall. Stems purple, ascending to erect, 2 or 3 × dichotomously branched from base, glabrous. Basal leaves withered at anthesis; petiole 1.5-3 mm; leaf blade ovate-elliptic to ovate, 0.7-1.5 cm × 3-7 mm, abaxially glabrous, adaxially densely and minutely papillate, margin ciliolate, apex acute; veins 1-3, distinct, slender. Stem leaves spreading; petiole tube 1-1.5 mm, papillate on margin and abaxially; leaf blade ovate-lanceolate to ovate-triangular, 5.5-11 × 2.5-4 mm, much shorter than internodes, abaxially glabrous, adaxially densely and minutely papillate, base rounded to cordate, margin ciliolate, apex acute; veins 1-3, distinct, slender. Flowers few to many. Pedicel 5-11 mm, to 3 cm in fruit, glabrous. Calyx obconic, 5-5.5 mm; lobes filiform-subulate, 2-2.5 mm, base 1-1.5 mm wide, apex acuminate, midvein prominent. Corolla outside with blue-gray stripes, inside pale blue with blackish short lines in throat, sometimes white or pale yellow, obconic, 0.8-1.2 cm × ca. 5 mm, to 8 mm in diam. in fruit; lobes ovate-orbicular, 2.5-3 mm, margin entire, apex subrounded; plicae ovate-oblong, 2-2.5 mm, with a fringe of usually 8-10 filaments. Stamens inserted at basal part of corolla tube, equal; filaments 3-3.5 mm; anthers ellipsoid, 0.7-1 mm. Style 0.7-1.5 mm; stigma lobes linear. Capsules obovoid, 4.5-5.5 mm; gynophore to 1.3 cm. Seeds light brown, ellipsoid, 1.3-1.5 mm. Fl. and fr. May-Sep.
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