Indigofera is a genus of flowering plants in the legume family, known for its diverse species, which are primarily found in tropical and subtropical regions. These plants are characterized by their compound leaves and clusters of small, often purple or pink flowers. Some species, like Indigofera tinctoria, are historically significant for their use in producing indigo dye. Many Indigofera species are also valued for their ability to improve soil fertility through nitrogen fixation. They are often used in agroforestry and as cover crops, helping to prevent soil erosion and enhance biodiversity in agricultural systems.