A strong woody climber.. Very young shoots ferrugineously sericeous, older ones glabrous, lenticellate.. Leaf-lamina obovate, oblong-obovate or rarely elliptic, (9–)12–20(–24) × 5–7 cm., abruptly acuminate, rounded or cuneate at the base, membranous, ferrugineous-sericeous on both surfaces when young, very soon glabrescent, only the midrib beneath remaining sericeous, with up to 18 pairs of lateral nerves, usually without glands; petiole robust, 5–7 mm. long, canaliculate, ferrugineously sericeous, glabrescent.. Inflorescence loose, forming axillary few-to many-flowered racemes, up to 10 cm. long; axis ± densely ferrugineous-sericeous; bracts lanceolate, 1.5–2 mm. long, acute, persistent; bracteoles very small, lanceolate, eglandular.. Flowers 2.5–3 cm. in diameter.. Calyx with 2 or 3 very small circular glands; lobes ovate to subcircular, 3–4 mm. long, somewhat sericeous outside, glabrescent.. Petals yellow, obovate to subcircular, 8–12 × 10 mm., distinctly clawed, lacerate at margins.. Stamens with lanceolate or oblong anthers 4–5 mm. long; filaments thick, ± 3 mm. long, glabrous.. Ovary densely sericeous; styles ± 1 mm. long.. Wing of samara obliquely semi-ovate to ovate-oblong, 5 × 2(–2.5) cm.. Fig. 1/10, p. 4 (but see note below).
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