Common name: Eastern Redbud
Family: Fabaceae
Genus: Cercis
Species canadensis
I wouldn´t say that the leaves in this picture are opposite. They look alternate in a compact branch. I can see two or three pairs of leaves coming from different points. I´d say that this is a dense branch with alternate leaves that look opposite due to the compact lenght between them. (the leaves´ shape match with the ones in plant above)
But then again, I could be wrong :^P