Want to make a big statement at the end of the season? Try sweet autumn clematis. This large vine (it can climb to more than 25 feet once established) literally covers itself in masses of starry white, fragrant flowers. You can smell it from across the yard on warm, sunny days. Name: Clematis ternifolia
Sweet Autumn Clematis (Clematis terniflora) blooms on new growth. Cut it back every spring to about 6 inches. This step is very important, otherwise it will not be as prolific of a bloomer. This Clematis easily spreads to cover a whole section of fence or large trellis in one year. Does best in full sun but will bloom in light shade as well.
Sweet autumn clematis is sure to fill your entire garden with its sweet scent at summer's end: http://www.bhg.com/gardening/design/color/white-flower-garden-ideas/?socsrc=bhgpin052814sweetautumnclematis&page=8