Erect shrub to 70 cm. Branches moderately pubescent with mainly simple, glandular and non-glandular hairs. Leaves triangular-cordate, sessile, 3–4 mm long, 2–2.5 mm wide, pubescent. Flowers solitary or in few-flowered cyme-like groups; pedicels 4.5–7.5 mm long. Calyx 4–5 mm long, densely glandular-pubescent. Corolla 6–10 mm long, almost glabrous outside, white, the striations purple; lobes broadly ovate to orbicular, 2–4 mm long. Stamens 4–5 mm long. Capsule ovoid-ellipsoid, apiculate, 4 mm long. Seeds not seen.