I love our native fringe tree, Chionanthus virginicus. Hardy to zone 3, it is delicate, fragrant and underused in the landscape. Sometimes I see it used here as a multi-stemed shrub, but seldom as a mature understory tree.
I've used it in gardens as a shrub, but never as a tree--I will after this week. On a road I have driven down hundreds of times, there it was in full glorious bloom, at a bus stop on Mountain Avenue in Springfield.