Stems twining, up to 30 m, young parts fulvous-strigose, sometimes with additional, short, slightly patent hairs. Leaves ovate to broadly ovate, 6-15 by 3-10 cm, obtuse to rounded and often shortly attenuate at the base, acuminate at the apex; upper surface glabrous except on the midrib, lower surface densely to sparsely fulvous-hirsute, most densely so on the nerves; midrib and 7-11 nerves on either side prominent beneath, minor nervation reticulate, inconspicuous; petiole 1-5 cm, hairy like the stem. Peduncles axillary, terete, longer than petioles, 5-20 cm, hairy like the stem, cymosely 3-30-flowered. Pedicels ca 3 mm. Bracts linear-lanceolate, ca 5 mm long, slightly hirsute beneath, caducous. Sepals unequal, two outer ones broadly ovate with rounded apex, ca 4½ mm long, hirsute at least in the basal half outside; two inner sepals transverse-ellptic, ca 6 mm long, often incised at the apex, most deeply so in fruit, glabrous outside or sparsely hirsute at the base. Corolla funnel-shaped, 15-18 mm long, whitish or pinkish outside, bright red inside; tube broad, limb distinctly 5-lobed, lobes ovate, ca 5 mm long; midpetaline bands hirsute with a glabrous wing on either side along the whole length. Filaments dilated at the base, glabrous. Ovary glabrous, 2-celled. Fruit ovoid, ca 15 mm long, deep red, 1-seeded.
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