- bastard indigo, Tephrosia purpurea - East Indian shrub
--1 is a kind of hoary pea
- false indigo, bastard indigo, Amorpha fruticosa - dense shrub of moist riverbanks and flood plains of the eastern United States having attractive fragrant foliage and dense racemes of dark purple flowers
--2 is a kind of amorpha
- false indigo, bastard indigo, Amorpha californica - an erect to spreading hairy shrub of the Pacific coast of the United States having racemes of red to indigo flowers
--3 is a kind of amorpha