It's called in Tamil as "Senganthal malar"(செங்காந்தள் மலர்). It's occupies a roll in ancient Tamil literature also. And it's the authorised flower of Tamil Nadu!
Note: This photo not clicked direct from plant. I picked it to home and clicked.
It's called in Tamil as "Senganthal malar"(செங்காந்தள் மலர்). It's occupies a roll in ancient Tamil literature also. And it's the main flower of Tamil Nadu!