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Corolla 5-lobed; lobes rounded, subequal; tube funnel-shaped with wide throat, somewhat curved.
Calyx (4)5-lobed, campanulate, inflated in fruit; lobes ovate, shorter than tube.
Flowers solitary, axillary, pedicellate, bracteate; bracts deciduous.
Seeds numerous, truncate at both ends, conical-cylindric.
Capsule globose, enclosed in persistent calyx.
Leaves opposite, pinnatisect, petiolate.
Perennial, slender, climbing shrub.
Ovary bilocular.
Ovules numerous.