Perennial with a large tuberous rootstock. Stems stout, older portions decumbent and up to 7 m long or longer, younger portions creeping or climbing, finely pubescent, glabrescent. Leaves orbicular-cordate with broad, shallow basal sinus, up to 250 mm long and wide, thinly hairy to quite glabrous, apex obtuse to acuminate, minutely emarginate and mucronate; petiole 50-150 mm long, stout, channelled above. Inflorescence cymosely 3-8-flowered or in upper portions of stems 1-3-flowered; common peduncle 20-60 mm long, stout; pedicels up to ±30 mm long; bracteoles early deciduous, minute. Calyx somewhat inflated, glabrous; sepals subequal, strongly imbricate, concave, coriaceous, ovate-oblong, obtuse or rounded at apex, 8-10 mm long, outer ones slightly larger than inner ones. Corolla funnel-shaped, with rose-pink lobes with yellowish tube, 65-80 mm long, limb as wide, spreading, shallowly 5-lobed, lobes rounded to emarginate; midpetaline areas very distinct, quite glabrous or bearded at apex. Stamens somewhat unequal, 20-25 mm long, included, shorter than style. Style 30 mm long, stigma rough. Capsule unknown. Seed unknown.
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