Glabrous twiner up to 3 m. Roots tuberous, c. 10 cm long, forming a bundle. Leaves alternate, seldom opposite; blade ovate-oblong, 6-21 by 2.5-10 cm, base sometimes shallowly, but more often broadly cordate, apex c. 2 cm acuminate, nerves 11-15; petiole 4-8.5 cm long. Inflorescence 2-many-flowered, on a peduncle 2.5-10 cm, not fused with the petiole; bracts narrow, 6-10 mm long. Flowers pendent; pedicels 8-10 mm long; tepals pink, brown pink or dark brownish red, 17-22 mm long. Stamens 13-18 mm long; anthers 7-10 mm long, the thecae proceeding as sterile ridges up to the top of the tepaloid outgrowth of the connectivum, and separated by a smooth projecting ridge, 1-1.5 mm high, equally tapering off towards the top of the tepaloid connectivum. Additional appendix of the thecae absent. Fruit 25-30 by c. 15 mm, shordy beaked, 2-6-seeded. Seeds 18-20 by 3-3.5 mm, the acuminate apex c. 5 mm, the base enveloped by an aril consisting of hollow, finger-like appendages.
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