KEY TO THE SUBSPECIES

1Pinnae 2-4 pairs; leaflets 5-13 pairs per pinna, with 3-4 accessory veins ascending from the base of the main vein, 1-1.5 by 0.3-0.7 cm, except for the distal pair ± similar. Seeds suborbicular-obovate. Mainland Asia (Ceylon, S India, Thailand, Cambodia, S Vietnam)
1'Pinnae 1 or 2 (or 3) pairs; leaflets (3-)5-8 pairs per pinna, with 2 or 3 accessory veins ascending from the base of the main vein, (0.8—)1.3—3.5 by (0.3-)0.6-2 cm, usually increasing gradually in size from proximal to distal pair. Seeds elliptic-obovate or ovate- elliptic in outline.