Chasmanthium latifolium / Northern Sea Oats

Northern Sea Oats is a perfect grass for a wet location where it’s allowed to spread. Its seed heads are particularly charming - they are flat but intricate and flutter beautifully in the breeze. In the fall, the seed heads turn a shiny copper, giving them great ornamental value. Plus, they look lovely in dried flower arrangements! Grow Northern Sea Oats in average to wet soil in full sun to part shade.

For plant description and info see below:

https://www.wildflower.org/plants/result.php?id_plant=CHLA5