Halesia

Now I get it. so glad you posted the tree. Suffolk must have a warmish climate? You seem to have plants, trees, we cannot in Vermont.

Wells, the Halesia's are native to the southeastern United States from South Carolina and Florida west to eastern Texas.They prefer a slightly acid soil.
Hardiness: USDA Zones 4 - 9. Carolina silverbells: USDA Zones 4-8; Two-winged silverbells: Zones 6-9.

You might find this link helpful: http://mobile.floridata.com/Plants/Styracaceae/Halesia%20spp./272