Perennial herb or shrublet, up to c. 1 m. tall, viscid-pubescent with glandular hairs on all parts except the corolla but also with long simple hairs and stellate hairs. Leaf-lamina up to 5·5 × 2·3 cm. but usually less, lanceolate to narrowly oblong-lanceolate, apex acute or subacute, margin serrate, base cuneate or rounded, pilose on both surfaces with appressed stellate hairs and some glandular hairs; petiole up to 1·4 cm. long; stipules 1–2 mm. long, lanceolate-subulate. Flowers solitary in the upper axils; peduncle slender, up to 1·3 cm. long; pedicel c. 3 mm. long; bracts c. 0·5 mm. long, deltoid-subulate. Calyx 5–6 × 5–6 mm., campanulate,-lobed 2/3 of the way; lobes narrowly triangular with long simple hairs and shorter glandular hairs. Petals c. 4–5 × 3 mm., pink, red or rarely whitish, obovate, apex denticulate, retuse or truncate, margin subauriculate and inrolled in the lower half, pilose across the opening created by this inrolling. Stamens with obovate filaments c. 2·5 mm. long, pilose on the shoulders; anthers 5–6 mm. long, pubescent. Ovary shortly stipitate, narrowly obovoid, densely glandular with a few hispidulous hairs at the apex and on the ribs; styles c. 5 mm. long, pubescent and glandular except near the apex. Capsule c. 8 × 7 mm., oblong-obovoid, densely glandular but hispidulous on the ribs, with short spreading horns c. 1·5 mm. long at the apex. Seeds c. 1·5 × 1 mm., subreniform, wrinkled and granulated.