Prostrate or sprawling, occasionally semi-erect. Stems up to 80 cm. long, branched, often very slender, glabrous, slightly woody in the older parts. Leaves usually scattered, sometimes close, ovate, 4-5 mm. long, 2-3 mm. wide, acute, squarrose, often falcate, toothed, ciliate at the base, the decurrent wings ciliate. Flower heads rarely over 1 cm. across, with 1-3 flowers. Bracts rotund-ovate, 4-6 mm. long, 3-4 mm. wide, acute, with rather irregular distant teeth near the top, ciliate at the base. Tips of the bracts squarrose. Calyx lobes not or very slightly longer than the bracts, 3-4 mm. long, acute, usually ciliate. Corolla white with blue veins or tinged with blue, 0-5-1-2 cm. long, the acute lobes as long as the tube. Ovary glabrous.
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Straggling shrublet to 50 cm. Leaves spreading-recurved, ovate, prickly toothed, apiculate, ciliate below and decurrent; bracts rotund-ovate. Flowers 1-3 in terminal heads, white or tinged blue, ± 10 mm diam., ovary glabrous.