Native meadow grasses and flowers. Meadows or mini-prairies are usually restorations of the grasses and flowers that grow naturally in the area (or close approximations of that ideal), made for viewing, walking through and enjoying.
Swaying in the wind--Verbena bonariensis. I love this flower, but be CAREFUL. It will reseed itself vigorously. I almost consider it a "garden thug". Great in flower arrangements, the tall purple flower is a wonderful accent.