Stems woody in the lower parts, commonly with long prostrate branches and few or many erect branchlets. Young stems with short hairs either all over or in lines. Leaves alternate, crowded or distant, up to 1.5 cm long, linear-subulate, flat or grooved above, keeled below, often trigonous, toothed on the edges, commonly with axillary fascicles. Flowers in the upper axils, crowded or distant, many or few, on pedicels 1-4 mm long, shorter than the subtending leaves. Calyx lobes 2-4 mm long, acute or mucronate, keeled and almost trigonous, bulged or even pouched at the base. Corolla blue, pale blue or white, 5-7 mm long, rather thin, the tube very short, the lobes narrow and almost cucullate. Bases of the filaments oblong-spathulate, acute to obtuse or even truncate, ciliate. Ovary almost superior, the lower part very short, retuse at the base, usually hairy, the upper part conical, glabrous. Style thickened near the top: stigma lobes 5 or 4, rarely 3. Fruit wider than long, 5-, 4-or rarely 3-chambered, the valves as long as the calyx lobes.
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Erect or sprawling shrublet to 30 cm. Leaves opposite or alternate, often tufted, spreading, linear, rigid, slightly toothed. Flowers in upper axils, white to blue fading yellow, ± 6 mm diam., tube to obsolete or to 1 mm long, sepals bulbous below, ovary half-inferior, hairy, sometimes glabrous.
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