Buxus Sempervirens

The original box hedge. English Buxus have long leaves with pointed ends, they can be used for hedging or topiary (stand alone or in a cluster). Slow growing. To create a tight hedge annual clipping would be required. New foliage has a lighter green colour but does darken when hardened off. During the winter months it is not uncommon for English Buxus foliage to bronze off, this discolouring does go away when warmer weather returns.
Buxus are a tree so can grow to very large sizes if allowed to.