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Leaf blades 4.4–10 × 2.3–6.8 cm, elliptic or slightly obovate, acute to rounded and sometimes shortly mucronulate at the apex, acute to obtuse at the base, entirely glabrous or pubescent on both surfaces; lateral nerves in 7–8 main pairs; domatia absent; bacterial nodules linear, restricted to midrib, few or absent; petioles 1.2–2.8 cm long, glabrous, or pubescent; stipules broadly ovate or occasionally subtruncate, mucronulate or shortly aristate, pubescent or glabrous outside, with few silky hairs inside.
Inflorescences terminal on leafy branches, or sometimes with additional subterminal elements, lax, 3–8 cm across (excluding the corollas), few-flowered; primary inflorescence branches 0.6–1.5 cm long, glabrous or pubescent; secondary branches absent or present; pedicels 0.4–1.8 cm long, glabrous or pubescent; bracts stipule-like; bracteoles very reduced or absent.
Calyx tube 2–3 mm long, sparsely to densely pubescent; limb-tube (2)3–5 mm long; lobes 9–12 × 2–3 mm, lanceolate, acuminate, costa prominent, sparsely pubescent to pubescent.
Corolla tube 4.4 cm long, 1.25 mm wide at the top, glabrous or pubescent outside and within; lobes 12–14 × 3.5 mm, ovate-oblong, acuminate.
Shrub or small tree up to 6 m tall; young branches pubescent or glabrous, older branches covered with thin peeling corky bark.
Fruit straw-coloured, 1.3 cm across, shiny, pubescent or ?glabrous; calyx lobes persistent, accrescent; pyrene white, pithy.
Seeds dull-brown, 5 mm wide, deeply wrinkled on convex face.
