Leaf-lamina 7–15 (19) × 2·5–5·5 (7) cm., oblong or oblong-elliptic, apex acute to subobtuse or acuminate, base rounded or rarely subcordate or broadly cuneate, coriaceous, usually with one pair of glands near the insertion of the petiole beneath and with 7–13 pairs of prominent lateral nerves, ferrugineous-tomentose (more densely underneath) when young, later usually glabrescent except usually beside the midrib underneath; petiole 2–6 mm. long, stout, canaliculate, pubescent or glabrescent.
Inflorescences (5) 8–15 (25) cm. long, usually racemes terminating leafy branches, sometimes axillary, many-flowered, pyramidal in outline; bracts 1–2 mm. long, triangular-lanceolate, densely ferrugineous-tomentose, eglandular; bracteoles very small, eglandular.
Samara with wing 3–4 (5) × 1·5–2·3 cm., obliquely obovate, sometimes somewhat constricted in the lower half, often distally oblique-truncate or obtuse, not clasping the nut, often purplish, usually glabrous.
Scandent shrub or tall woody climber with branches up to 15 m. in length, younger ones ± densely rusty pubescent, older ones quite glabrous, lenticellate.
Stamens with anthers c. 4 mm. long, oblong-ovate, glabrous; filaments ± 1·5 mm. long, thick, ± ligulate.
Calyx with 2–3 circular glands; sepals 3–3·5 × ± 2·5 mm., ovate, sericeous or glabrescent outside.
Ovary densely ferrugineous-tomentose; styles 2, 8–10 mm. long, stout, terete, curved inwards.
Petals up to 11 × 8 mm., elliptic to ovate, unguiculate, yellow.
Flowers c. 2·25 cm. in diam.