Stems erect, woody, 25-35 cm high, much branched. Leaves much crowded, fasciculate, squarrose, ericoid-rolled, 3-5 mm long, gray-green, ciliate at the base otherwise glabrous, usually toothed at the base. Flowers in groups of 2-5 at the tips of the branches: peduncles hairy, 2 mm long. Calyx lobes about 2 mm long, triangular revolute at the edges but not rolled. Corolla white, blue or purple outside, about 6 mm long, the tube 3 mm, distinctly longer than the calyx lobes, the lobes glabrous. Bases of the filaments elliptical-oblong, densely ciliate. Style hairy, thickened at the tip. Ovary inferior, hemispherical, as wide as long, about 2 mm, hairy. Fruit valves about as long as the calyx lobes.
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Like W. calcarea but more erect with corolla tube longer than calyx, ± 3 mm long.