Shrub 1–5 m high with white latex; branches pale grey-brown, lenticellate; branchlets glabrous or pubescent, lenticellate. Leaves petiolate; blade elliptic, 4–26 cm long, 1.5–13 cm wide, acuminate at the apex, cuneate, rounded or subcordate at the base, membraneous when dry, glabrous, rarely pubescent; petiole 0–7 mm long, glabrous, rarely pubescent. Inflorescence 4–17 cm long, 3–10 cm wide, glabrous in all parts, rarely pubescent; peduncle slender, 1.5–7 cm long; bracts minute, sepal-like, early caducous, leaving large scars; pedicels thin, 5–20 mm long. Flowers with sepals persistent, up to 3.5 mm long; corolla tube 8–10 mm long, campanulate; lobes suborbicular, 3–6 mm long, 3.5–6 mm wide, rounded, not forming a head in mature bud; stamens inserted 2.8–3.5 mm above the corolla base; pistil 4.5–5 mm long; style split at the base, 1.2–1.5 mm long; ovules 30 in each carpel. Fruits yellow or pale orange, recurved or straight, 3–6 cm long, 0.8–1 cm wide, acuminate at the apex, indented around the seeds when dry; seeds 5.5–6 mm long. Fig. 17 (p. 53).