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Ovary sessile or subsessile, 1-locular, glabrous or slightly pubescent or pilose at the top; disk cup-shaped or lobed, membranous; style terminal or sublateral; stigma capitate or subcapitate, finely papillose, sometimes exserted.
Stamens 10 in 2 whorls, or practically in 1 series, attached at the middle of the tube and included or attached in the throat of the tube and exserted; filaments of those opposite the sepals usually longer.
Leaves opposite, subopposite or rarely alternate, petiolate; blade elliptic to ovate, acuminate, chartaceous to coriaceous; lateral nerves spreading almost at right angles.
Calyx tube funnel-shaped, glabrous outside, glabrous or hairy inside, somewhat fleshy, not articulated, persistent; lobes 5, equal to the tube or much shorter.
Flowers 5-merous, subsessile or shortly pedicellate, solitary or 2–4, with small, sometimes ciliate, bracts.
Lianes, climbing shrubs or small trees with twining branches; twigs with conspicuous lenticels, glabrous.
Fruit a drupe with a sclerified pericarp, included in the persistent calyx tube.
Petals absent or 10 minute glands inserted at the throat of the tube.
Inflorescences axillary.
Seed oblong, fusiform.