2n = 30

Slender, fibrous-rooted, glabrous, perennial, climbing or scrambling herb. Stems ribbed, often becoming tuberculate. Lvs on slender petioles to 5 cm long, spreading. Lamina 2.5-7 cm long, palmately 5-7-lobed almost to base; lobes lanceolate, obtuse to subacute or mucronate, entire or outer again lobed; terminal lobe larger. Infl. 1-2-(4)-flowered; peduncles to 5 cm long, ± erect. Pedicels to c. 3 cm long. Sepals 6-10 mm long, ovate, obtuse or subacute. Corolla 4.5-6 × 5-8 cm, funnelform, mauve with darker throat, very rarely white. Stamens included. Capsule 12 mm diam., globose-ovoid. Seeds 2-4, hairy until mature, often becoming glabrous after dehiscence.