Cybistax is a genus of trees in the family Bignoniaceae.

It contains a single species, Cybistax antisyphilitica, a tree from tropical North and South America.

[1] These semi-deciduous plants have greyish green, opposite, palmately compounded leaves and close-grained, light-colored wood good for furniture.

In early spring, the plants bear showy clusters of bright yellow, funnel-shaped flowers 2–2.5 cm wide at branch ends.

Pods are 25–50 cm long, straight, pendulous and brown with thin, flat seeds inside.