Mostly
scandent (vine-like) or trailing shrubs, with
opposite leaves which are
entire (have a smooth edge) and are
petiolate (have a leaf stalk). The
calyx (sepals of a flower) has 8 or 10 glands. The petals are yellow and dentate (edges are teethed) and the fruit (or seed capsule) has 3
samaras (A dry,
indehiscent fruit with its wall expanded into a wing). ==Known species==