Side Oats Grama - Perennial grass that grows in dry prairies with red oat-like seedheads that hang from the stems & small bright purple & orange flowers when it blooms in late summer. 
 
Growth: Can grow 2 - 3 feet tall.
Light: Full sun.
Soil: Can tolerate a variety of soil including dry sand, gravel, & even medium clay.
Hardiness: Very drought resistant. Not very aggressive.
Benefits: Host plant for Skipper butterflies & moths.