Chasmanthium latifolium (River Oats, Northern Sea Oats)

Ornamental grass that reaches a height of 2 to 5 feet with a spread of 1 to 2.5 feet.  Prefers moist, rich soil but tolerates a variety of environments.  Tolerates full sun to part shade.  Produces flat, drooping seed heads that turn purplish bronze by late summer.