An erect or prostrate to decumbent, divaricately branched annual herb up to 50 cm long, branches obtusely or acutely 4-angled. Leaves oblong, elliptical to narrowly elliptical, up to 8 cm long. Flowers in 3-7-flowered cymes, corolla with geniculate lobes, white or occasionally pale blue. Fruit turbinate-obovoid. Seeds transversely ellipsoid. |