Cassia Roxburghii is an evergreen flowering perennial tree. The red cassia is a medium-sized tree growing to 15–20m tall with spreading, drooping branches. The leaves are clusters of pink, rose or orange flowers, long and pinnate with three to eight pairs of leaflets, each leaflet 7–21cm long and 4–9cm broad. The flowers are produced in pendulous racemes 20–40cm long, each flower 4–7cm diameter with red to pinkish petals. The fruit is a legume.