KEY TO THE SPECIES

1Flowers aggregated into solitary or paired, axillary racemes (Sect. Paraserianthes)
1'Flowers aggregated into panicles (Sect. Falcataria)
2Leaflets oblong to trapezoid, 8-25 mm broad, obtuse
2'Leaflets oblong-falcate, (2-)3.2-6 mm broad, sharply acute(-cuspidate)