This is Asarina scandens Joan Lorraine, also known as Twining Snapdragon, and Chickabiddy. This vine likes to live in the sun and can grow about 8 feet long. It blossoms from late Spring until early Fall. This variety has a rich deep color pallet of purple and blue. Many people grow this vine as an Annual, and it is a tender perennial in USDA Hardiness Zones 9 to 10