| 1 | Inflorescences/infructescences paniculate, terminal and axillary. Pedicels usually 5-7 mm |
| 1' | Inflorescences/infructescences racemose, axillary. Pedicels longer, 10-40 mm |
| 2 | Leaves with 3-5 pairs of pinnae; stipules linear, caducous. Pedicels short, 10-12 mm. Petals suborbicular, subreniform, or broadly obovate, 12-16 mm long and wide. Seeds longitudinally positioned in the pod |
| 2' | Leaves with 5-9 pairs of pinnae; stipules lobed and usually relobed, often persistent at anthesis. Pedicels 20-40 mm. Petals obovate, 15-25 by 10-12 mm. Seeds more or less transversely positioned in the pod |
