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