Main stems woody, most commonly prostrate, up to 30 cm long, with few or many erect almost herbaceous branches. Young stems red-brown, ridged, hairy. Leaves mostly opposite, spreading, rather rigid, usually fasciculate, 4-8 mm long, 1-3 mm wide, acute, flat or more commonly folded upwards, rounded below, the edges with minute obtuse teeth. Lower leaves crowded, the upper close or distant. Flowers terminal and axillary, solitary, the terminal with pedicels 4-9 mm long, the lateral about 2 mm long. Pedicels and calyx hispidulous. Calyx lobes 1.5-3 mm long, bulged on the back, often toothed, revolute in the older phases. Corolla white, 4-6 mm long, hispidulous or rarely subglabrous, the tube as long as or longer than the calyx lobes. Bases of the filaments oblong-obovate, ciliate on the upper part. Ovary hispid, at least half superior, 5-4-or 3-chambered, the lower part distinctly wider than long. Style thickened below the stigma. Fruit 2-4 mm diam., 1.5-2 mm long: valves about as long as the calyx lobes.
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Sprawling to prostrate, often diffuse shrublet to 30 cm. Leaves alternate or opposite, reflexed, lanceolate, channelled, sometimes flat, slightly toothed below. Flowers in upper axils on slender pedicels, white, ± 5 mm diam., tube ± 1 mm long, ovary half-inferior, roughly hairy.
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