Description from Flora of China
Psedera Necker ex E. L. Greene; Quinaria Rafinesque (1830), not Loureiro (1790).
Lianas, woody, hermaphroditic. Tendrils racemosely 4-12-branched, young apex expanded or curving, later turning into adhesive disks or suckers. Leaves simple, 3-foliolate, or palmately 5(-7)-foliolate. Inflorescence a panicle or a loose corymbose polychasium, pseudoterminal. Flowers 5-merous. Calyx cupular, glabrous, 5-dentate. Petals free. Stamens 5. Disk inconspicuous, rarely with 5 nectaries. Style conspicuous. Berry 1-4-seeded. Seeds obovoid, chalazal knot rounded at middle; ventral raphe raised; 2 lateral ventral holes furrowed upward from base to apex; endosperm cross-section M-shaped. 2n = 40.
About 13 species: Asia, North America; nine species (six endemic, one introduced) in China.
(Authors: Chen Zhiduan (陈之端); Jun Wen (文军))