Stem twining, unifariously puberulous; leaves herbaceous, only 2 seen; petiole 1 1/2 in. long; blade 2 3/4 in. long, 1 3/4 in. broad, cordate, acuminate, with a deep broad-based sinus and rounded basal lobes, thinly and minutely adpressed-pubescent above, glabrous beneath; peduncles lateral at the nodes, very short, 2-4 lin. long, 4-to very many-flowered, puberulous on one side; pedicels 7-9 lin. long, very slender, glabrous; sepals about 1 1/3 lin. long, lanceolate, attenuate, glabrous; corolla-tube shallowly cupular, about 1 lin. deep and 2 lin. in diam., faintly contracted at the top, glabrous inside and outside; lobes apparently ascending-spreading, 1/4 in. long, 1 1/2 lin. broad at the base, lanceolate, acute, glabrous on both sides, apparently dull purple; outer corona-lobes fleshy, 1/4 lin. long, spreading, subquadrate-ovate, deeply concave, with a small bifid reflexed apex, in front of which, on the inner face, is a small channelled tubercle-like keel, dark purple-brown; inner corona-lobes 1/2 lin. long, produced much beyond the anthers, linear-spathulate, or linear-lanceolate, obtuse, connivent-erect, sometimes only adnate up to the base of the anthers, at others up to their tips, dorsally connected at the base to the basal margins of the outer corona-lobes, dark purple-brown; staminal column 1/2 lin. long; anthers overtopping the small truncate style-apex.
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Perennial, herbaceous climber. Stems slender, up to 2 m long. Leaves heart-shaped, 54-95 x 30-65 mm, petiolate. Inflorescences axillary, umbels lax, 4-8-flowered. Flowers 12.0-15.7 mm in diam. Corolla: basal saucer yellow-green-striped, rimmed maroon; lobes yellow-green; cupular plate 1.5-2.0 mm deep, 5.5-6.5 mm in diam., housing gynostegial column; lobes lanceolate to ovate, 6.0-7.5 x 4.0-6.5 mm. Staminal corona dark purple; lobes ± 0.5 mm long, pouch with 2 distal, falcate, knob-like protrusions, proximally fused to each other and to back of interstaminal lobes. Corona: interstaminal corona lobes ± 1 mm high, base somewhat bulbous where attached to anthers, apically linear-ligulate, erect and incumbent on style-stigma-head, bifid. Follicles paired, stalks straight, filiform, curved at very base, smooth and glabrous, apical hook minute.
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