This is Clematis virginiana, also known as Devils Darning Needles, devils darning needles, devils hair, love vine, travellers joy, wild hops, woodbine, and Virgins Bower. This white flower is wildly fragrant and grows well in full sun or partial shade where it blooms in the middle of the Summer. This is a larval host plant for the Fatal Metalmark butterfly and the Fall Clematis Clearwing Borer moth. It also attracts a wide variety of birds, bees, and butterflies. USDA Hardiness Zones 4b to 8.