• Indigofera Linnaeus, 1753
• Indigofera acanthinocarpa Blatt.
• Indigofera acanthoclada Dinter
• Indigofera acanthorhachis Dinter accepted as Lessertia acanthorhachis (Dinter) Dinter
• Indigofera acasonicae Brandegee accepted as Indigofera lespedezioides Kunth
• Indigofera accepta N.E. Br.
• Indigofera achyranthoides Taub.
• Indigofera acutiflora N.E. Br.
• Indigofera acutifolia Schinz accepted as Microcharis disjuncta (J.B. Gillett) Schrire
• Indigofera acutifolia Schltdl. accepted as Indigofera miniata Ortega
• Indigofera acutipetala Y.Y. Fang & C.Z. Zheng
• Indigofera acutisepala Baker f. accepted as Indigofera zeyheri Eckl. & Zeyh.
• Indigofera adami Berhaut accepted as Indigofera congolensis De Wild. & T. Durand
• Indigofera adenocarpa E. Mey.
• Indigofera adenoides Baker f.
• Indigofera adesmiifolia A. Gray
• Indigofera adscendens Eckl. & Zeyh. accepted as Indigofera heterophylla Thunb.
• Indigofera affinis Harv. accepted as Indigastrum burkeanum (Harv.) Schrire
• Indigofera albicans Span. accepted as Indigofera linifolia (L. f.) Retz.
• Indigofera alopecuroides (Burm. f.) DC.
• Indigofera alopecurus Schltr. accepted as Indigofera foliosa E. Mey.
• Indigofera alpina Eckl. & Zeyh.
• Indigofera alternans DC.
• Indigofera ambelacensis Schweinf.
• Indigofera amblyantha Craib
• Indigofera amitina N.E. Br.
• Indigofera ammobia Maconochie
• Indigofera ammophila Thulin accepted as Microcharis ammophila (Thulin) Schrire
• Indigofera ammoxylum (DC.) Polhill
• Indigofera amoena Aiton
• Indigofera amorphoides Jaub. & Spach
• Indigofera anabaptista Baker accepted as Indigofera hochstetteri Baker
• Indigofera anabaptista sensu auct. accepted as Indigofera rhytidocarpa Harv.
• Indigofera anabibensis A. Schreib.
• Indigofera anceps Poir. accepted as Indigofera hendecaphylla Jacq.
• Indigofera ancistrocarpa Thulin
• Indigofera andrewsiana J.B. Gillett
• Indigofera andringitrensis R. Vig.
• Indigofera angolensis D. Dietr. accepted as Indigofera suffruticosa Mill.
• Indigofera angulosa Edgew.
• Indigofera angustata E. Mey.
• Indigofera angustifolia
• Indigofera angustiloba Baker f. accepted as Indigofera torulosa E. Mey.
• Indigofera anil Linnaeus accepted as Indigofera suffruticosa Mill.
• Indigofera ankaratrensis R. Vig.
• Indigofera ankaratrensis R. Vig., p.p. accepted as Indigofera imerinensis Du Puy & Labat
• Indigofera annua Milne-Redh. accepted as Microcharis annua (Milne-Redh.) Schrire
• Indigofera antennulifera L. Bolus accepted as Indigofera arenophila Schinz
• Indigofera antunesiana Harms
• Indigofera aquae-nitentis Bremek.
• Indigofera arabica Jaub. & Spach
• Indigofera aralensis Gagnep.
• Indigofera arborea Roxb. accepted as Indigofera cassioides DC.
• Indigofera arcuata Willd. accepted as Indigofera trita L. f.
• Indigofera arecta A. Rich. accepted as Indigofera arrecta A. Rich.
• Indigofera arenaria E. Mey. accepted as Indigofera exigua Eckl. & Zeyh.
• Indigofera arenaria sensu Andrews, p.p. accepted as Indigofera hochstetteri Baker
• Indigofera arenicola R. Vig. accepted as Vaughania dionaeifolia S. Moore
• Indigofera arenophila Schinz
• Indigofera argentata (A. Gray) Rydb. accepted as Indigofera miniata Ortega
• Indigofera argentata I.M. Johnst. accepted as Indigofera nesophila Lievens & Urbatsch
• Indigofera argentea Burm. f.
• Indigofera argentea Linnaeus accepted as Indigofera articulata Gouan
• Indigofera argentea sensu Baker accepted as Indigofera suffruticosa Mill.
• Indigofera argentea sensu Roxb. accepted as Indigofera oblongifolia Forssk.
• Indigofera argutidens Craib
• Indigofera argyraea Eckl. & Zeyh. accepted as Indigastrum argyraeum (Eckl. & Zeyh.) Schrire
• Indigofera argyroides E. Mey. accepted as Indigastrum argyroides (E. Mey.) Schrire
• Indigofera aristata Spreng.
• Indigofera arrecta A. Rich.
• Indigofera arrecta Harv. accepted as Indigofera confusa Prain & Baker f.
• Indigofera articulata auct. non Gouan accepted as Indigofera coerulea Roxb.
• Indigofera articulata Gouan
• Indigofera articulata sensu Andrews, p.p. accepted as Indigofera coerulea Roxb.
• Indigofera articulata sensu auct. accepted as Indigofera suffruticosa Mill.
• Indigofera aspalathifolia Roxb. accepted as Indigofera aspalathoides DC.
• Indigofera aspalathoides DC.
• Indigofera aspalathoides sensu Dalzell & A. Gibson accepted as Indigofera uniflora Roxb.
• Indigofera asparagoides Taub. accepted as Microcharis asparagoides (Taub.) Schrire
• Indigofera aspera DC.
• Indigofera asperifolia Benth.
• Indigofera asterocalycina Gilli
• Indigofera astragalina DC.
• Indigofera atrata N.E. Br.
• Indigofera atricephala J.B. Gillett
• Indigofera atriceps Hook. f.
• Indigofera atrinota N.E. Br. accepted as Indigofera reducta N.E. Br.
• Indigofera atropurpurea auct. non Hornem. accepted as Indigofera hamiltonii Duthie & Prain
• Indigofera atropurpurea Hornem.
• Indigofera auricoma E. Mey.
• Indigofera australis Willd.
• Indigofera baileyi F. Muell.
• Indigofera bainesii Baker
• Indigofera bakeriana P. Vig. accepted as Indigofera demissa Taub.
• Indigofera balfouriana Craib
• Indigofera bancroftii Peter G. Wilson
• Indigofera bangweolensis R.E. Fr.
• Indigofera banii N.D. Khoi & Yakovlev
• Indigofera barberi Gamble accepted as Indigofera trifoliata Linnaeus
• Indigofera barteri Hutch. & Dalziel