Rather slender climbers, glabrous throughout. Leaves petiolate, simple, very eccentrically peltate, broadly ovate, essentially entire or if 3-lobed the central lobe far stronger and the lateral relatively inconspicuous, the base truncate or broadly rounded, 5-8 cm. long and broad; petioles 2-3 cm. long, eglandular; stipules large and foliaceous, inequilaterally reniform, amplexicaul, ciliate-serrate, about 1 cm. long and 2 cm. broad, deciduous. Inflorescences bearing solitary yellowish-white flowers upon paired or solitary peduncles, the associated tendril basal; peduncles 1.5-2.0 cm. long, jointed almost immediately beneath the flower; bracts minute and subulate. Flowers about 4-6 cm. in diameter; sepals oblong, 2-3 cm. long, not corniculate; petals similar to the sepals; filaments of the corona in 2 series, the outer about 1.5 cm. long. Fruit globose, 3-4 cm. in diameter, deep purple.
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