Annuals 1-4 cm tall. Stems ascending to erect, subquadrangular, branched from base. Basal leaves with blade spatulate, 2-4 × ca. 1 mm including petiole, base narrowed, margin scabrous, apex obtuse. Stem leaves sessile, lanceolate to oblong, 2-6 × to 2 mm, base and apex obtuse, veins abaxially indistinct. Flowers terminal, solitary, 5 or rarely 4merous. Pedicel 0.5-1.5 cm, subquadrangular. Calyx 3-6 mm; lobes oblong to elliptic, 2.5-5 × 1-2 mm, base slightly narrowed, margin scabrous, apex obtuse. Corolla blue-purple, tubular, 4-10 mm; lobes ovate, 1-3 × 1.5-2.5 mm, apex obtuse and mucronate, papillate outside. Nectaries 8 or 10. Filaments less than 1 mm; anthers yellow, ellipsoid, 1-1.2 mm. Style short; stigma lobes small. Capsules ovoid-ellipsoid, to 1.3 cm. Seeds brown, ellipsoid, ca. 1 mm; seed coat smooth. Fl. and fr. Sep.
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