Barnebydendron riedelii, also known as monkey-flower tree (Thai: ประดู่แดง), is a species of flowering plants in the legume family, Fabaceae.

It belongs to the subfamily Detarioideae.

It is the only member of the genus Barnebydendron.

It is a tree reaching 10–12 m in height with scarlet red flowers.

Originally it came from tropical dry forests of Central America and tropical South America but it has been extensively grown in tropical areas worldwide as a garden tree.