Stems woody, prostrate, ascending or erect, branched. Leaves usually crowded, erect or squarrose, often secund. linear or linear-subulate, 0-5-1 cm. long, glabrous except for stout setose hairs near the base, the midrib broad and bulging below. Leaves persistent for more than one year, in the later stages with axillary fascicles of small leaves. Flowers solitary, often on short branches. Bracts like the leaves but usually more crowded, more strongly ciliate, and sometimes toothed. Calyx lobes flat, 5-8 mm. long, linear-lanceolate, entire or with lateral teeth, glabrous or hairy on the back, on the inside hairy all over, on the middle line only, or glabrous. Corolla white or pale blue, concolorous, 0-8-1-3 cm. long, often hairy outside, the lobes acute, spreading, longer than the tube, the calyx lobes longer than the tube. Anthers longer than the filaments. Style hairy, bulged below the stigma. Ovary hairy.
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Erect or sprawling shrublet to 50 cm. Leaves often with axillary tufts, linear-pungent, ciliate, midrib prominent beneath; bracts leaf-like, crowded, ciliate below sometimes prickly toothed, glabrous or sparsely hairy. Flowers solitary at branch tips, white or pale blue, 10-15 mm diam., ovary hairy.
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