Caesalpinia mimosoides

Butterflies like Southern Birdwing(Troides minos), Malabar Banded Peacock(Papilio buddha), Malabar Rose(Pachliopta pandiyana), Common Imperial(Cheritra freja), Lime(Papilio demoleus) were observed being nectaring on the inflorescence of these flowers...the plants were present along the road side with regularly moving vehicles hence it was almost impossible to take photos of those butterflies while nectaring...so just submitted photos of flower(in close-up) & habitat...