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.
Shrublet, up to 0.6 m high. Branchlets with many patent, gland-tipped hairs intermixed with long, pointed, patent hairs. Inflorescence a 1-flowered cyme in axils of leaves. Capsule glandular-pubescent between sutures, glabrescent. Flowers pale pink to pale violet.
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.
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.
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.
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.
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.
Stamens with obovate filaments c. 2·5 mm. long, pilose on the shoulders; anthers 5–6 mm. long, pubescent.
Seeds c. 1·5 × 1 mm., subreniform, wrinkled and granulated.