(Clematis) Simply breathtaking best describes Clematis Venosa Violacea. The beautiful 4-5 inch blooms feature white with deep purple veins extending out to solid purple edges. Venosa Violacea is an extremely distinctive cultivar that should be part of every clematis collectors garden. Standing 8-9 feet tall, Venosa Violacea is a perfect selection to meander through shrubs, grow up a trellis/arbor or in a combination planter. Blooming July through August, Venosa Violacea adds a stunning splash of vertical color to your garden throughout the summer.