Erect subshrub 20–100 cm high; stems triangular, slightly ribbed, c. glabrous, smooth. Leaves sessile, usually oblong-elliptic, 12–45 mm long, 3–17 mm wide, glabrous or slightly tomentose when young, margins toothed and recurved or thickened. Inflorescence branches 1–3 in upper axils, 1(–2)-flowered, to c. 10 mm long, with appressed grey medifixed hairs; pedicels 3–9 mm long; bracteoles 1 or 2, linear-oblong, 1.5–2 mm long. Sepals 0.5–1 mm long, often unequal; corolla 9–11 mm long, purplish-blue to white inside, with appressed grey hairs outside, wings 1–2 mm wide, veined. Fruit obloid, 2–3 mm long, glabrescent. Flowers mainly Sep.–Jan.