Clematis 'Rooguchi' (Clematis)

A non-vining clematis?  Yep.  Two inch purple flowers hang down on a plant that can grow 6-8' tall if given something to grow through like a chain link fence or other trellis like feature.  It just doesn't grab on though.  One of the best ways to use it is to leave it alone in a perennial border and let it crawl around where it wants to.