deschampsia caespitosa (tufted hair grass)

Look closely and you will see this grass in front of the shasta daisies.  It doesn't look like much now - that's because I bought a $3-sized perennial in the spring this year (can't resist a deal!) and it gets quite a bit of shade.

But in a year or two this will fill in to become a large, dense clump, and I am already loving the fine, airy seed heads. 

Tufted hair grass will get to be about 1 m tall and is a highly recommended ornamental grass for the prairies.