What is this bush? I've searched through my tree book and looked online,
but haven't found anything to match. It's quite nice. The most striking
thing is the way that the flower cluster grows out of the tip of the
branch where you'd usually see a leaf on a branch of this type. The leaf
edges are very smooth which ruled out a couple things that I thought it
might be.

http://www.phlaunt.com/jennysgarden/18218074.php