Japanese Tree Lilac (Syringa reticulate): Upright spreading tree. Deep green foliage with creamy-white flowers in late June.  Very fragrant.  Makes an excellent small specimen tree.  Height: 7 m; Width: 6 m. Full sun.  Hardiness Zone 3

Photo Credits:
City of Moose Jaw Parks and Recreation Leslie J. Mehrhoff, University of Connecticut, Bugwood.org