Climber or sparsely-branched shrub up to 3 m. high, glabrous, showing conspicuous heterophylly. Leaves coriaceous, with the nerves and veins prominent on both faces, those of saplings and juvenile shoots 10–21 × 0·4–1·1 cm., linear, pinnatipartite with the segments obliquely triangular; leaves on sterile adult branches 4–10(12) × 1–4·5(6) cm., entire, elliptic or oblong, acute or sometimes acuminate at the apex, cuneate at the base, or irregularly pinnatipartite or divided to the midrib; leaves of floriferous branches 4–7 × 1·5–3·5 cm., elliptic, acute or obtuse at the apex, entire or with a few fairly deep divisions, strongly undulate at the margin; petiole 7–12 mm. long, with a pair of glands at the top. Tendrils axillary, slender to stout, 3–10(15) cm. long. Flowers c. 1·5 cm. long and c. 2 cm. in diameter, white, odoriferous, solitary or in axillary fascicles; pedicels c. 5 mm. long. Hypanthium very short, c. 5 mm. wide. Sepals 7–9 × 3–5 mm., ovate or broadly oblong, obtuse or acute, with very distinct reticulation. Petals similar to the sepals, but smaller, narrower and of a thinner texture. Corona with the tube 2·5–3 mm. high and the threads c. 4 mm. long. Stamens with filaments c. 10 mm. long, shortly connate at the base; anthers c. 4 mm. long. Ovary c. 2·5 × 2 mm., ovoid, on a swollen gynophore c. 3 mm. long; style c. 1·5 mm. long, thick, crowned by a (3)—4-lobed stigma c. 2·5 mm. in diameter. Capsule 4·5–5 × 2·5 cm., many-seeded. Seeds c. 6·5 × 4 × 2·5 mm., pyriform.