Cherokee Princess is an excellent example of the North American flowering dogwoods - Cornus florida. The species gets its name from the Latin word "florida" which means flowering - not from the state of Florida. It is native to the north-eastern USA, from Boston southwards.
The main feature is the very large white petal-like bracts, which provide an attractive spring blossom display.
The tree will often bear fruitlets - not palatable for humans, but very popular with birds and animals, making this a good choice if you want to encourage wildlife into your garden.