Perennial climber; stems smooth, 5-angled or muricate, glabrous; leaves alternate, digitate or palmately compound, divided up to base into 5-7 lobes, leaflets lanceolate to ovate or elliptic, glabrous; petioles up to 5 cm, as long as the blade, pseudostipules present; inflorescence lax, 1 to 3 flowered cymes, peduncles upto 8 cm long, pedicels 1-2 cm long; bracts minute; sepals ovate, obtuse, subequal, glabrous, 4-6 mm long; corolla large, purple or bluish purple, infundibuliform tube with short spreading lobes, stamens 5, epipetalous, included, pilose; capsules subglobose, 2-4 valved, 1-1.5 cm across, glabrous; seeds subglobose to ovoid, densely, shortly tomentose at margins.