Annuals 3-20 cm tall. Stems prostrate to ascending, angular, much branched from base; branches slender, glabrous. Leaves sessile, spatulate to obovate, 5-10 × 1.5-5.5 mm, base narrowed, apex obtuse to rounded, veins 1-3. Inflorescences racemelike, few to many flowered. Flowers 5merous. Pedicel to 3 cm, spreading to erect, slender, angular, glabrous. Calyx tube 2-3 mm; lobes obovate-spatulate, 2.5-4 × ca. 2 mm, sinus between lobes rounded, base narrowed into a claw, margin blackish and scabrous, apex rounded, veins 1-3. Corolla blue, 6-8 mm in diam., tube 2-3 mm; lobes broadly ovate, 4-8 × 4-5 mm, apex acuminate. Nectaries lamellate, margin lobed. Filaments 3-4 mm; anthers blue, ellipsoid, 1.5-2 mm. Ovary ovoid-ellipsoid, 4-5 mm, apex acuminate. Stigma lobes decurrent to apical part of ovary. Capsules ovoid-ellipsoid, 1.2-1.4 cm. Seeds light brown, subglobose, 0.5-0.7 mm in diam. Fl. Aug-Sep.
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