Tridens Flavus (Purpletop)

Height: 4-5'; 1-2' spread 
Light: Full Sun    
Native Perennial    
Soil: Dry soils, sands, and clay.    
Purplish spikelets on stalks that, when planted in groups, create a beautiful purple-topped field. Grass is home to many native insect species and seed feeds birds. Drought tolerant. 
 

Mary Keim https://www.flickr.com/photos/38514062@N03/8041397283/