Leaf blades black or green when dry, (4)5–13 × 1.3–4 cm, oblanceolate or sometimes narrowly elliptic, acute to slightly acuminate at the apex, cuneate at the base, subcoriaceous, glabrous or rarely very sparsely hairy above, often shiny, sometimes with sparse white hairs on nerves beneath, rarely ciliate; lateral nerves in c. 6 main pairs; domatia absent; bacterial nodules elliptic to linear along the midrib; petiole 0.6–1.3 cm long, glabrous or less often puberulous above, with few white hairs beneath; stipules 3.5–8 mm long, ovate-triangular, obtuse, sometimes mucronulate, puberulous or pubescent outside, with white silky hairs inside.
Inflorescences not markedly lax, 1.2–4 cm across (excluding corollas); primary inflorescence branches (1)2.5–8 mm long, puberulous to ± glabrous or less often pubescent-puberulous; secondary branches present; pedicels 1.5–6 mm long, puberulous to sparsely puberulous or pubescent-puberulous, occasionally glabrous; bracts brown, papery, 4–8 mm long, pubescent to puberulous outside, with dense silky hairs inside.
Calyx tube 1–1.25(2) mm long, glabrous or sparsely puberulous; limb-tube 1–1.25 mm long, c. 1½ times wider than the tube, glabrous or occasionally sparsely puberulous, truncate, slightly undulate or with lobes not exceeding 0.25 mm long.
Corolla tube 1.2–1.5 cm long, 2 mm wide at the top, glabrous outside, not bearded at the throat; lobes 6–9 × 2–3 mm, ± oblong, obtuse to slightly acuminate.
Shrub or small tree, 1–8.4 m tall; young branches puberulous or less often pubescent-puberulous, older branches covered with buff flaky bark, often gnarled.
Inflorescence-supporting branches 1–10 cm long, leafless or bearing 1 pair of leaves at the apex.
Fruit spherical or compressed lengthwise, 0.8–1.2 cm wide, glabrous, calyx limb persistent.
Seeds c. 5 mm across.
Style 3–4.7 cm long.