Tree which has the red flowers

Not a very good photo of the tree, but you can see the clumps of lovely red flowers on it. Photo taken from the balcony of amma's flat. In the compound beyond the wall is Kottivakkam's private (but very public) Mosquito Breeding Centre. Damn the NRI who bought the land only to let it get bogged down while he lives it up in some First-World country, safe from all bloodthirsty mosquitoes!