This tribe does not currently have a node-based, phylogenetic definition, but it can be distinguished by the following morphological synapomorphies: the presence of biramous hairs, keel spurs, short free staminal filaments, and short fruiting pedicels; and the loss of stipels and seed arils.[3]
^Cite error: The named reference Kew Indigofereae was invoked but never defined (see the help page).
^ abSchrire BD; Lavin M; Barker NP; Forest F (2009). "Phylogeny of the tribe Indigofereae (Leguminosae-Papilionoideae): Geographically structured more in succulent-rich and temperate settings than in grass-rich environments". Am J Bot. 96 (4): 816–52. doi:10.3732/ajb.0800185. PMID21628237.
^ abCardoso D; de Queiroz LP; Pennington RT; de Lima HC; Fonty É; Wojciechowski MF; Lavin M (2012). "Revisiting the phylogeny of papilionoid legumes: new insights from comprehensively sampled early-branching lineages". Am J Bot. 99 (12): 1991–2013. doi:10.3732/ajb.1200380. PMID23221500.
^Crisp MD; Van Wyk B-E (2000). "Molecular phylogeny of the genistoid tribes of papilionoid legumes". In Herendeen PS; Bruneau A; Pollard PSc (eds.). Advances in Legume Systematics, Part 9. Royal Botanic Gardens, Kew. pp. 249–276. ISBN9781842460177.
^Schrire BD; Lavin M; Barker NP; Cortes-Burns H; von Senger I; Kim J-H (2003). "Towards a phylogeny of Indigofera (Leguminosae-Papilionoideae): Identification of major clades and relative ages". In Klitgaard BB; Bruneau A (eds.). Advances in Legume Systematics, Part 10: Higher Level Systematics. Royal Botanic Gardens, Kew. pp. 269–302. ISBN9781842460542.