Stems twining,to 4 m,rather denselyand shortly strigose or strigose-hirsute to nearly glabrous. Leaves ovate to broadly ovate, 4-11 by 2.5—7 cm, rounded or slightly cordate at the base, acute to slightly acuminate at the apex; upper surface glabrous,lower surface strigose-hirsute, most densely so on midrib and nerves, to nearly glabrous; midrib and 6-7 nerves on either side prominent beneath; minor nervation reticulate, rather distinct beneath; petiole slender, 1—4.5 cm, hairy like the stem. Peduncles axillary, terete, 2-15 cm, hairy like the stem, but slightly more densely so, cymosely 2-25-flowered. Pedicels ca 3 mm long, in fruit up to 1 cm, hairy. Bracts triangular, ca 3 mm long, hirsute beneath, caducous. Two outer sepals broadly ovate, with rounded apex, ca 5-5½ mm long, densely and shortly appressed-pilose outside; two inner ones transverse-elliptic, ca 5½-6 mm long, with two broad glabrous margins, sepal 3 with one glabrous margin. Corolla funnel-shaped, ca 25 mm long; pale pink to nearly white outside, mauve or deep magenta inside; tube not distinct from upper part; limb shallowly lobed; midpetaline bands hirsute, connecting fields and basal portion of corolla glabrous. Stamens and style included. Filaments dilated at the base, glabrous. Ovary glabrous, 2-celled. Fruit ovoid, ca. 1½ cm long, 1-seeded.
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