Erect shrub to 1 m high; stems terete, ribbed, white- or golden-tomentose with branched hairs, or scabrous. Leaves sessile or shortly petiolate, obovate to elliptic, 9–60 mm long, 5–42 mm wide, upper surface glabrescent, often scabrous, lower surface grey- or golden-tomentose, margins entire or toothed. Inflorescence branches 3–5-flowered, (1–)2–9 together in upper axils, with golden branched hairs; peduncles 5–15 mm long; pedicels 1–3 mm long; bracteoles linear-oblong, 2–4 mm long. Sepals 0.2–0.5 mm long, obscured by hairs; corolla 12–15 mm long, purple or blue inside, grey- to black-tomentose outside, wings 1.5–2.5 mm wide. Fruit obovoid, 4–5 mm long, tomentose, ribbed. Flowers mainly Sep.–Dec.