PlantFiles: Verbena
Verbena 'Superbena Blue Purple'

From the Proven Winners website:

Super-size your verbenas with the new Superbena line. Proven Winners introduces a new take on verbenas that will quickly rise in the ranks to join its esteemed verbena cousins. Superbenas are larger flowering and more vigorous in growth habit than their predecessors, and they’re also extremely resistant to powdery mildew. They have a large broad-leafed form and a semi-prostrate growth habit with large cascading forms. With a broad pallet of colors, the only challenge will be finding a way to use them all. Available in: Blue-Purple, Burgundy, Coral-Red, Dark Blue, Large Lilac Blue, Pink Shades, and Purple.