Lianas woody. Leaves opposite or subopposite; leaf blade elliptic or lanceolate to ovate. Inflorescences axillary, simple or branched spikes crowded toward branchlet apex and forming a large, often dense, bracteate panicle. Calyx tube proximally ellipsoid, 5-ridged, distally campanulate; lobes 5, triangular-lanceolate at anthesis, persistent and much enlarged in fruit. Petals absent. Stamens 10. Fruit narrowly ovoid, dry, longitudinally 5-ridged; persistent calyx lobes spreading, winglike, elliptic to oblanceolate or narrowly so.
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