Cassia brewsteri, commonly known as Brewster's cassia, Leichhardt bean, cassia pea and bean tree is a species of shrubs or small trees, of the plant family Fabaceae.

They grow naturally in Queensland, Australia.

In the case of Cassia brewsteri the leaflets are approximately 5 cm long, bright green, glossy or waxy above and whitish-green below.

Flowers are yellow, often with red markings, and produced in racemes.

The flowers are followed by round pods, up to 45 cm long.