Tree ID help needed

Tree ID help needed

Need help identifying a North Carolina tree. Found just outside of Johnston County (7B), growing mostly along the shoulder of the road but also in yards. Trees spotted as tall as 50-60 (?) feet. Has billowy white blooms and dark green tapered leaves. Reminds me of a very tall Crape Myrtle--even a Ligustrum--but not as compact or dense. Was told it may be a Chase or Chaste tree, but can find little to support this. Any ideas?
Photobucket
ETA: Thanks to everyone that helped me ID it!
My gardens before…

My gardens before…

Spring here at Last?!?!?!?

Spring here at Last?!?!?!?

Help with tomatoes?

Help with tomatoes?

Some pics of my garden

Some pics of my garden

Moving “Palmettos” & Gardenias

Moving “Palmettos” & Gardenias

The ultimate thriftiness with food!

The ultimate thriftiness with food!