Akebia quinata, also known as the Chocolate Vine, has five leaves. It spreads quickly as either a vine (give it some structure to hold onto) or a ground-cover.
Fragrant purple flowers with chocolate centers appear with the new growth in spring. To keep this plant within whatever bounds you want it to stay, prune after it flowers.
Photo courtesy of Toms Creek Nursery in Denton, NC (336) 857-2131