Bignonia, the common name for a family of trees, shrubs, vines, and herbs. There are about 700 species, including the trumpet creeper, catalpa, and calabash. Members of this family have opposite leaves (that is, leaves that grow in pairs) and two to four stamens in the flowers. They grow in warm regions of the world, including the southern United States.

The cross vine, which is also called quarter vine and trumpet flower, is a bignonia found in the United States. It is a woody vine with heart-shaped leaves and orange-red flowers shaped like trumpets. A cross can be seen inside the stem when it is cut in half. The vine grows from Virginia to Florida and west to Texas.

The bignonia family is Bignoniaceae. The cross vine is Bignonia capreolata.