Stems twining, terete, longitudinally wrinkled in dry state, very sparsely appressed-pilose, gla-brescent, pale greyish-brown. Leaves ovate to ovate-oblong, oblong-lanceolate or narrowly lanceolate, 7½-12½ by (1½-)4-7 cm, rounded to truncate at the base, or in narrow leaves acute to cuneate; acuminate or attenuate towards the acute apex; glabrous on both sides except for a few scattered hairs, mainly along the nerves and especially beneath; nerves 5-7 on either side of the midrib; secondary nerves parallel; petiole l.5-6 cm, very sparsely pilose like the stems and the peduncles. Peduncle axillary, short, ½-2 cm, cymo-sely branched at the apex, few-flowered. Pedicels 2½-5 mm, sparsely hairy. Bracts triangular, small, 1-2 mm long. Sepals about equal in length, ca 4 mm long; two outer ones ovate-elliptic; inner ones broader, all obtuse; outer ones with some scattered hairs on their middle portion or glabrous. Corolla tubular, ca 1½-2½ cm long, white; limb very shortly lobed; midpetaline bands with appress-ed hairs outside, for the rest glabrous. Dilated base of filaments with hairs along the margins. Ovary glabrous, 2-celled. Fruit ovoid, ca 12 mm long, on a pedicel 5-8 mm long.
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