The beautiful shimmering seedheads of Northern Oat Grass (Chasmanthium latifolium) make it a marvelous plant in the garden or in dried arrangements. This perennial grass grows from rhizomes to 36 inches tall with a 2-foot spread in sun or total shade. The seedheads start out green and turn bronze with age. Also known as River Oats, Wild Oats, and North American Wild Oats.