Reminds strongly of a lavender, Lavandula. Quite a few cultivars, I couldn't find one with an accurate name that had the same colour combination.
Looks very like Salvia leucantha. Comon name Velvet sage. http://www.mountainvalleygrowers.com/salleucantha.htm http://images.google.com/imgres?img...n-gb:IE-SearchBox&rlz=1I7SUNA_en-GB&sa=N&um=1 http://commons.wikimedia.org/wiki/Category:Salvia_leucantha