Hundreds; see text Cassia is a genus of flowering plants in the legume family, Fabaceae, and the subfamily Caesalpinioideae.

Cassia now generally includes the largest species of the legume subtribe Cassiinae, usually mid-sized to tall trees.

Cassia is also the English common name of some unrelated species in the genus Cinnamomum of the family Lauraceae.

For example, the skipper Astraptes fulgerator and the pierids Catopsilia pomona and C. pyranthe are all seen on Cassia fistula.

In Central America, its pods are stewed into a molasses-like syrup, taken as a sweetener and for its nutritional and medicinal effects.