These are just a few of my favorite flowering trees around campus. They are past their prime now but were absolutely beautiful last week when these pictures were taken.
Flowering dogwood (Cornus florida)
Redbud (Cercis canadensis)
Purple and white redbuds (Cercis canadensis)
I like redbuds in particular; they produce lovely and unusual flowers and develop a great overall shape with age, as well as lush foliage in the summer.