A shrub or tree 0·5–7 m. tall. Branchlets with a dense pubescence of short simple hairs and, usually, sparser longer hairs 0·3–1·0 mm. long, these longer hairs sometimes glandular and sometimes with short branches near the base. Leaves in whorls of 4, appressed to spreading, straight or slightly curved inwards, linear to ovate, acute, 1·0–2·5 mm. long, 0·6–0·8 mm. broad; glabrous or pubescent with erect hairs, with glandular teeth on the apparent margin or sparse glandular hairs on the apparent margin and the lower surface, sometimes a glandular hair at the apex; petiole up to 0·5 mm. long, pubescent with very short hairs. Flowers in clusters of 4–16 at the tips of the branchlets. Pedicels 1·0–1·5 mm. long, pubescent, the hairs erect and c. 0·1 mm. long, sometimes very sparse. Calyx infundibuliform, normally pubescent with erect hairs c. 0·1 mm. long on the outer surface and along the margins, sometimes glabrous on the outer surface with either ciliate or glandular margins, all the lobes leaf–like at the tip; the 3 equal lobes ovate, acute 0·8–1·4 mm. long, reaching to about the sinuses of the corolla, fused to less than 5 their length,the sinuses acute; the 4th lobe equalling to appreciably exceeding the corolla. Corolla infundibuliform, pale green suffused red, normally glabrous, occasionally with a few hairs on the outer surface, shallowly divided, 1·0–2·0 mm. long, 0·9–1·6 mm. broad, lobes obtuse, sinuses acute. Stamens 6, occasionally 7 or 8 in some or all flowers, equalling the corolla, anthers remaining fused after dehiscence. Ovary 4–locular, pubescent, sometimes very sparsely so; style 0·6–1·0 mm. long, glabrous or sparsely pubescent at the base or throughout, equalling or slightly exceeding the anthers, the terminal disc 0·6–1·0 mm. in diameter.
