Lianas, woody, hermaphroditic, with lenticels and white pith. Tendrils 2-branched. Leaves palmately pentafoliolate. Compound dichasium leaf-opposed. Flowers 5-merous. Calyx cupular, entire. Petals 5, coherent in bud, opening at anthesis and falling off separately. Stamens usually 5. Disk inconspicuous. Style conspicuous; stigma inconspicuously enlarged. Berry spherical, sweet and sour in taste. Seed flat, pyriform, base rostrate, apex retuse, ventral holes furrowed upward 2/3 from base; cross-section of endosperm M-shaped. 2n = 40*.
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