• Crotalaria Linnaeus, 1753
• Crotalaria abbreviata Baker f.
• Crotalaria abscondita Baker
• Crotalaria acapulcensis Hook. & Arn. accepted as Crotalaria maypurensis Kunth
• Crotalaria acervata Baker f. accepted as Crotalaria subcapitata De Wild.
• Crotalaria acervata sensu Hepper accepted as Crotalaria subcapitata De Wild.
• Crotalaria acicularis Benth.
• Crotalaria aculeata De Wild.
• Crotalaria aculeata sensu Brenan, p.p. accepted as Crotalaria virgulata Klotzsch
• Crotalaria acuminata (DC.) G. Don accepted as Crotalaria verrucosa Linnaeus
• Crotalaria acuminata DC. accepted as Bolusia capensis Benth.
• Crotalaria acuminatissima Baker f. accepted as Crotalaria elisabethae Baker f.
• Crotalaria acuminatissima sensu R. Wilczek accepted as Crotalaria arcuata Polhill
• Crotalaria acutiflora Benth. accepted as Crotalaria grandiflora Benth.
• Crotalaria adamii R. Wilczek
• Crotalaria adamsonii Baker f.
• Crotalaria adenocarpoides sensu R. Wilczek, p.p. accepted as Crotalaria annua Milne-Redh.
• Crotalaria adenocarpoides Taub.
• Crotalaria adolfi Harms
• Crotalaria aegyptiaca Benth.
• Crotalaria affinis DC. accepted as Crotalaria incana Linnaeus
• Crotalaria afrocentralis Polhill
• Crotalaria agatiflora Schweinf.
• Crotalaria agatifolia Schweinf. accepted as Crotalaria agatiflora Schweinf.
• Crotalaria alata Collett & Hemsl. accepted as Crotalaria collettii Prain
• Crotalaria alata D. Don
• Crotalaria alata sensu Hepper accepted as Crotalaria stipularia Desv.
• Crotalaria alba Linnaeus accepted as Baptisia alba (L.) Vent.
• Crotalaria albertiana Baker f. accepted as Crotalaria brevidens Benth.
• Crotalaria albicaulis Franch.
• Crotalaria albida Roth
• Crotalaria alemanniana Torre
• Crotalaria alexandri Baker f.
• Crotalaria allophylla Thulin
• Crotalaria alticola Polhill
• Crotalaria altipes Raf. accepted as Crotalaria spectabilis Roth
• Crotalaria amadiensis De Wild. accepted as Crotalaria glauca Willd.
• Crotalaria amoena Baker
• Crotalaria anagyroides Kunth accepted as Crotalaria micans Link
• Crotalaria andringitrensis R. Vig.
• Crotalaria andromedifolia R. Wilczek
• Crotalaria androyensis R. Vig.
• Crotalaria angulata Mill.
• Crotalaria angulata Senn accepted as Crotalaria rotundifolia J.F. Gmel.
• Crotalaria angulicaulis Harms
• Crotalaria angulosa Lam. accepted as Crotalaria verrucosa Linnaeus
• Crotalaria angustifolia (Gagnep.) Niyomdham
• Crotalaria angustissima E. Mey. accepted as Crotalaria excisa (Thunb.) Baker f.
• Crotalaria anisophylla (Hiern) Baker
• Crotalaria anisophylla Urb. accepted as Crotalaria ekmanii Windler & S.G. Skinner
• Crotalaria ankaizinensis R. Vig.
• Crotalaria ankaranensis M. Peltier accepted as Crotalaria bernieri Baill.
• Crotalaria ankaratrana R. Vig.
• Crotalaria annamensis Phon
• Crotalaria annua Milne-Redh.
• Crotalaria anomala R. Vig.
• Crotalaria anthylloides D. Don accepted as Crotalaria calycina Schrank
• Crotalaria anthylloides Lam. accepted as Crotalaria sessiliflora Linnaeus
• Crotalaria anthyllopsis Baker
• Crotalaria antunesii Baker f.
• Crotalaria antunesii sensu Torre, p.p. accepted as Crotalaria annua Milne-Redh.
• Crotalaria arborescens Lam. accepted as Crotalaria capensis Jacq.
• Crotalaria arcuata Polhill
• Crotalaria arenaria Benth.
• Crotalaria arenaria sensu Zoll. & Moritzi, non Benth. accepted as Crotalaria albida Roth
• Crotalaria arenicola (De Wild.) Dummer accepted as Lotononis arenicola De Wild.
• Crotalaria argenteotomentosa R. Wilczek
• Crotalaria argyraea Baker
• Crotalaria argyraea Franch. accepted as Crotalaria saltiana Andrews
• Crotalaria argyrolobioides Baker
• Crotalaria aridicola Domin
• Crotalaria arnottiana Benth. accepted as Crotalaria verrucosa Linnaeus
• Crotalaria arthroophylla Verd. accepted as Crotalaria pallidicaulis Harms
• Crotalaria arushae Polhill
• Crotalaria assamica Benth.
• Crotalaria assurgens Polhill
• Crotalaria astragalina sensu R. Wilczek accepted as Crotalaria onobrychis A. Rich.
• Crotalaria astragalinoides Baker f. accepted as Crotalaria onobrychis A. Rich.
• Crotalaria atrorubens Benth.
• Crotalaria aurantiaca Baker accepted as Crotalaria laburnifolia Linnaeus
• Crotalaria aurea Baker f.
• Crotalaria australis (Baker f.) Verd. accepted as Crotalaria laburnifolia Linnaeus
• Crotalaria avonensis Delaney & Wunderlin
• Crotalaria awasensis Thulin
• Crotalaria axillaris Aiton
• Crotalaria axilliflora Baker f.
• Crotalaria axillifloroides R. Wilczek
• Crotalaria azaisii Sacleux accepted as Crotalaria quartiniana A. Rich.
• Crotalaria bagamoyoensis Baker f. accepted as Crotalaria laburnoides Klotzsch
• Crotalaria bahiaensis Windler & S.G. Skinner
• Crotalaria bakerana Rossberg accepted as Crotalaria bakeriana Rossberg
• Crotalaria bakeriana Rossberg
• Crotalaria balansae Micheli
• Crotalaria balbi Chiov.
• Crotalaria ballyi Polhill
• Crotalaria bamendae Hepper
• Crotalaria barbata Wight & Arn.
• Crotalaria barkae Schweinf.
• Crotalaria barnabassii Baker f.
• Crotalaria barretoensis Windler & S.G. Skinner