Large woody twiners. Leaves petioled, elliptic, ovate or oblong, penninerved, entire, chartaceous or coriaceous. Flowers small, in rusty brown tomentose racemes, the racemes axillary or subpaniculate towards the ends of the branches. Bracts initially small, adnate to the pedicel, in fruit much accrescent, broadly elliptic to orbicular, scarious, reticulately nerved, bearing the calyx with capsule near its centre. Bracteoles minute, hairy. Sepals 5, subequal, suborbicular, hardly enlarged in fruit. Corolla regular, rotate to broadly campanulate, white, or reddish, deeply 5-lobed, the lobes induplicate-valvate in bud. Stamens 5, adnate to the corolla-tube, exserted or included; filaments filiform, glabrous or hairy at the base; pollen smooth. Ovary hairy, perfectly or imperfectly 2-celled, 4-ovuled; styles 2, free, short, each with a peltate, lobed or kidney-shaped stigma. Capsule small, glabrous, 1-celled, 4-valved. Seed 1, globose, smooth, glabrous, dull black.
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Lianas, woody. Leaves petiolate, papery or leathery, margin entire. Inflorescences axillary, racemose, or subpaniculate toward apices of branches; bracts initially small, 1 bract becoming much enlarged in fruit, scarious, reticulate veined; bracteoles minute. Sepals 5, subequal. Corolla white or reddish, rotate to broadly campanulate, deeply 5-lobed. Stamens 5, adnate to base of corolla tube, exserted or included; filaments pubescent at base or glabrous; pollen not spiny. Ovary partly or fully 2-loculed, pubescent, 4-ovuled. Styles 2, free, short; stigmas peltate or reniform, ± lobed. Capsule small, glabrous, 4-valved. Seed 1, globose, smooth, glabrous.
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