Indigofera hirsuta is accepted species in  the family Fabaceae  subfamily: Faboideae, tribe: Indigofereae,  
Genus Indigofera 
This species is found in Angola, Assam, Bangladesh, Benin, Bismarck Archipelago, Bolivia, Borneo, Botswana, Brazil North, Brazil Northeast, Brazil South, Brazil Southeast, Brazil West-Central, Burkina, Burundi, Cambodia, Cameroon, Cape Verde, Central African Repu, Chad, China South-Central, China Southeast, Christmas I., Cocos (Keeling) Is., Comoros, Congo, Ecuador, Equatorial Guinea, Ethiopia, Free State, French Guiana, Gabon, Gambia, Ghana, Guinea, Guinea-Bissau, Gulf of Guinea Is., Guyana, Hainan, India, Ivory Coast, Jawa, Kenya, Laos, Lesser Sunda Is., Liberia, Madagascar, Malawi, Malaya, Mali, Mauritania, Mauritius, Mozambique, Myanmar, Namibia, New Guinea, New South Wales, Niger, Nigeria, Northern Provinces, Peru, Philippines, Queensland, Réunion, Senegal, Sierra Leone, South China Sea, Sri Lanka, Sudan, Sulawesi, Taiwan, Tanzania, Thailand, Togo, Uganda, Venezuela, Vietnam, West Himalaya, Western Australia, Zambia, Zaïre, Zimbabwe.