Herbaceous or subligneous vines; stems pubescent, the hairs of 2 types, short bulbous ones overtopped by brown, multicellular, stiff ones to 3 mm in length which decrease in density with age. Leaves broadly ovate-cordate, acuminate, glabrate to densely puberulent beneath, puberulent above, 6-10 cm long and 3-7 cm wide; petioles slender, 2-6 cm long. Inflorescences racemiform, 10-20-flowered, minutely brown puberulent; peduncles 1-1.5 cm, occasionally to 3 cm long; pedicels mostly 2-3 cm long. Flowers with the calyx lobes lanceolate-ovate to ovate, glabrous inside, brownish puberulent outside, 2-4 mm long and 1.5-2.5 mm wide; corolla brownish to orange, the lobes strongly reflexed at maturity, ovate to elliptic, puberulent outside, inner (adaxial) surface with long whitish hairs along the margin and near the apex, occasionally scattered over the entire surface, 4-6 mm long and 2-3 mm wide; corona fleshy, annular, the surface cor-rugated, purplish-black, 1.5-2 mm high; gynostegium slightly exceeding the corona in height; stigma head round or obscurely 5-angled. Follicles narrowly ovoid with a slender acuminate apex, 10-12 cm long, ca. 2 cm in diameter, tu-berculate, pubescent, the tubercles long and slender, to 1.5 cm long, the pubes-cence of brownish, multicellular hairs up to 6 mm long.
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