Thank you, Jeanne. It looks like I'm lucky to have any flowers at all on this one by what I'm reading.

Posted by flora_uk SW UK 8/9 (My Page) on Sun, Jun 9, 13 at 3:14 Thank you for your response. I am not asking a question ... just sharing. They are also called "mock orange". I thought they are smallish shrubs before.

I think this may be the tree being talked about. We live in Omaha (zone 5b) and when we were helping a friend landscape at their new home, we dug up one of the offshoots by the trunk and planted it in our yard. The tree is already providing full shade in the yard (04/17/16) while the other trees in the neighborhood are just budding leaves. The leaves start to grow quickly followed by the flowers. The leaves start out green then quickly turn a deep burgundy as soon as it stops flowering. The tree bears no fruit. The flowers have an overwhelming scent similar to southern jasmine. The scent is so strong that it becomes unbearable at times. It is right outside our bedroom window so we sometimes have to close the window on nice nights because, while the smell is beautiful and intoxicating, it is unbearable in large amounts! This overpowering scent isn't in an allergy kind of way, it is more like if you sat in a small closet and lit 10 of your favorite incense sticks then stayed in there for two weeks with 10 sticks constantly burning! I would love to know the name of it but my research has produced little results. It is similar to the 'summer glow bird cherry fruit' tree but it doesn't produce any fruit. (Edited) I've tried to post a photo but it isn't showing up yet. The tree I'm talking about is none of the ones mentioned in the posts here. My tree is is not ornamental yet it doesn't get more than around 40' tall.

Take a look at the bark, too. Dark, a tiny bit of shine & with lenticils (those little lines on the bark) a bit like cherry.