Gulmohar tree is the first flowering tree that comes to mind. Mainly because of my childhood memories of using it’s flower buds to stick on the nails for fun and games.
Lagerstroemia Speciosa (no that’s not a Hogwards Spell :P), also known as Pride of India tree is mostly found in tropical regions.
Indian Cork tree is grown all over India for its evergreen beauty. This tree is native of Burma and today it’s grown for its ornamental value.
Rain Tree is an attractive tree with thin branches, large canopy, and pink flowers. This deciduous (sheds leaves annually) tree grows quite fast.
Kadamba is a full sized evergreen tree that produces unique flowers / fruits that smells really good.