Slender climbers, glabrous or essentially so. Leaves petiolate, simple, basifixed, much broader than long, with 2 nearly transverse lateral lobes and usually a slender central mucro or rarely a small central lobe, 0.5-3.0 cm. long, 3-10 cm. broad, conspicuously glandular-ocellate; petioles 1-6 cm. long, eglandular; stipules minute and subsetaceous. Inflorescence usually solitary and bearing a single greenish white, occasionally purple-tinged flower, the associated tendril basal; peduncle 3-10 cm. long, jointed almost immediately beneath the flower; bracts inconspicuous and setaceous. Flowers about 2-4 cm. in diameter; sepals ovate-lanceolate, 1-2 cm. long; petals narrowly oblong, 8-12 mm. long; filaments of the corona in 2 series, the outer almost equaling the petals. Fruit globose, 1.0-1.5 cm. in diameter, purple.
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