Rather massive climbers, essentially glabrous throughout. Leaves rather long-petiolate, simple, basifixed, oblong-elliptic and entire to the tip or very broadly 3-lobed with the central lobe stronger than the lateral, obtuse to rounded at the base, 5-12 cm. long, 2-9 cm. broad, membranaceous to subcoriaceous, rather con-spicuously glandular-ocellate; petioles 1-4 cm. long, eglandular; stipules subseta-ceous, inconspicuous. Inflorescences bearing solitary greenish-white, faintly purple-tinged flowers upon usually paired peduncles, the associated tendril basal; peduncles about 2-5 cm. long, jointed far above the middle almost directly beneath the flower; bracts inconspicuously subsetaceous. Flowers 3-4 cm. in diameter; sepals ovate-lanceolate, 1.0-1.5 cm. long, not corniculate, glabrous to more or less puberulent within; petals about half to one third as long as the sepals; filaments of the corona in 2 series, the outer about as long as the petals. Fruit subglobose, 2-3 cm. in diameter.
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