In Florida there are few, if any, flowering trees that can come close to the particularly showy blossoms of the Tabebuia or Pink Trumpet Tree.

There are no leaves on the tree during flowering but I love the contrasting silvery wood of the branches.

The 3" long, trumpet-shaped flowers appear in spring and can be pink, purple, or yellow, depending on the species.

I spotted these spectacularly flamboyant trees planted in two rows of 5 in front of a business down in Manatee County (about 1.5 hours South of me) while on our out of town trip this weekend. Don't they make a stunning display against the blue sky?
You would plant this tree in full sun but you'd have to live in the warmer parts of South Florida or another frost-free humid climate. They are native to the Amazon rainforest. Pink trumpet is a semi-deciduous tropical tree that grows to an ultimate height of 50 ft and requires little maintenance.
What is your favorite flowering tree?