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Information Twining and climbing, rarely suberect herb from 20 cm. up to 1 m. or more long, from a tuber c. 3–5 x 1·5–2 cm.; stem not or sparsely branched, ribbed, glabrous below, ± densely, very finely crisped pubescent at least in the upper part of the inflorescence region. Leaves petiolate, up to 35–140 x (2)10–30(45) mm., linear to ovate, acute to acuminate at the apex, attenuate to cuneate at the base, glabrous; margin serrate or serrate–crenate, flat or ± revolute; venation prominent beneath; petiole up to 5–15 mm. long. Raceme twining, lax, up to 50 cm. long, sometimes with ± short and few–flowered branches below, or with 2–3–flowered branches almost to the top of the inflorescence; pedicels 1·5–18 mm. long, very shortly crisped pubescent; bracts up to 5–20 mm. long; bracteoles 1–3·5 mm. long, sometimes denticulate. Hypanthium broadly obconical, 10–nerved, shortly crisped pubescent at least towards the base. Calyx–lobes narrowly triangular, erect to ± reflexed, 1·5–8 mm. long, glabrous, with 1–8 pairs of teeth at the margin, basal teeth sometimes very long and resembling the calyx–lobes. Corolla 8–18 mm. long, white, greenish yellow, pink, purple or red, tubular with 5 subequal lobes, or at least the 2 lower petals sometimes becoming ± free; all petals linear, short pubescent outside at least towards the base, pubescent inside, at least towards the base. Stamens 3·5–6 mm. long; filaments linear, free, pubescent; anthers narrowly elliptic–oblong, 1·2–2 mm. long, with a short tuft of hairs at the apex and ± sparsely pubescent with hairs 0·1–0·2 mm. long or rarely glabrous on the back of the connective. Ovary semisuperior; style 2·5–5 mm. long. Capsule subglobose, inferior part 2–5 mm. long, membranous, with 10 distinct nerves connected by weak transversal nerves; valves 4–9 mm. long. Seeds almost round in outline, flat, 2·4–3·2 x 2–2·8 mm., broadly winged, brown.