Climbing annual or perennial to ± 2 m., glabrous or pubescent (on lower leaf-surface and sepals).. Tendrils 5–12 cm.. Leaf-blades unlobed, broadly ovate to oblong, up to 10 by 6(–7) cm., or leaves deeply (2–)3-lobed, base rounded to cordate; lobes ovate to oblong, 1.5–7.5 by 0.7–3 cm.; top subacute; margin towards base with remote slender teeth 0.5–1 mm.; petiole 0.5–4 cm.. Stipules 1.5–4 mm. False stipules absent.. Inflorescences (1–)2-flowered; peduncle 1–6 cm. (rarely flowers sessile on short shoots); bracts 1–3 mm.. Flowers glabrous or pubescent; stipe 3–7 mm.. Hypanthium 1.5–3.5 mm. wide.. Sepals (4.5–)6–7 mm., subacute.. Petals 0.. Outer corona-tube barrel-shaped, 2–2.5(–3) mm., threads ± 2 mm.. Disk 0.2 0.5 mm.. Inner corona cup-shaped, 1–1.5 mm.. Stamens 5; filaments 3–3.5 mm.; anthers 1.5(–2) mm.. Ovary (0.5–)1–2 mm.; styles 3(4), free or nearly so, (0.5–)2–3.5 mm.. Fruit (excluding the 2–3 mm. long gynophore) ±1.5 cm., containing 1–5 seeds.. Seeds ± 5 mm.
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