Changes

*Woody liana up to 20 m long, young branches densely to sparsely short-hairy, rarely sparsely glandular. *Leaves opposite or almost opposite, simple and entire; stipules absent; petiole up to 1 cm long, persisting and hardening after the leaf drops and resembling a thorn-like spur; blade elliptical or oblong-elliptical, 5–18.5 cm × 2.5–9 cm, apex acuminate, base rounded or almost cordate, densely short-hairy to nearly glabrous, papery, minutely warted, pinnately veined with 5–7 pairs of lateral veins. *Inflorescence a terminal and axillary spike, 2–5(–10) cm long, sometimes forming a leafy panicle, bracts lanceolate or elliptical, 6–10 mm long, apex acuminate. *Flowers bisexual, regular, 5-merous, sessile, fragrant at night; receptacle consisting of 2 parts, lower part 3–4 mm long, short-hairy, upper part narrowly tubular, slightly expanding at apex, 6–8 cm long, densely to sparsely short-hairy; sepals triangular, tiny; petals free, oblong to oblong-ovate, up to 2.5 cm × 1.3 cm, apex rounded to acute, star-shaped, white becoming pink then red to dark red on the inner face; stamens 10, in 2 rows, inserted near the mouth of the upper receptacle, 7–8 mm long; ovary inferior, 1-celled, style up to 2.5 mm long, partly adnate to tube. *Fruit a 5-winged nut, ovate-elliptical, 2.5–4 cm × 1–1.2 cm, acutely 5-angled, wings 1–2 mm wide, stout, with 0.5–1 mm long stipe, reddish brown, indehiscent, 1-seeded. *Seedling with hypogeal germination.