Sesbania drummondii, known as poisonbean, rattlebox and rattlebush, is a medium-sized perennial shrub in the legume family Fabaceae. It is native to the southeastern United States, from Texas east to Florida. These plants flower from May to October, usually retaining many of the seed pods, which remain attached until the plant dies back to ground level for the winter. This plant prefers moist soils of ditches and frequently-inundated meadows, as well as depressions and the open edges of lakes, ponds and streams.