Plants rather slender, climbing, glabrous throughout. Leaves rather long-petiolate, simple, basifixed, broadly cuneate-subtrapezoid, with 2 strongly ascending lateral lobes, rarely with a weak central lobe, broadly obtuse or rounded at the base, 3-10 cm. long and broad, inconspicuously glandular-ocellate; petioles 1-5 cm. long, eglandular; stipules minute and subsetaceous. Inflorescences bearing solitary yellowish green flowers upon paired peduncles, the associated tendril basal; pe-duncles about 1.5-4.0 cm. long, jointed above the middle; bracts inconspicuous and subsetaceous. Flowers about 2 cm. in diameter; sepals narrowly oblong-lanceolate, about 1 cm. long, not corniculate; petals absent; filaments of the corona in 1 series, about half as long as the sepals or less. Fruit globose, about 1 cm. in diameter, dark purple.
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