Take a look at this Link http://www.houzz.com/ideabooks/25748318/list/6-Native-Ground-Covers-for-Tough–Dry-Spots
Houzz.com
“Blue Grama Grass
(Bouteloua gracilis)
Native to the prairies yet found in almost all of the states west of the Mississippi River
Growing 6 to 12 inches tall, blue grama is great as a lawn alternative that slowly spreads by rhizomes and seed (you can even mow it). Blue grama has a dense root system that’s perfect for preventing soil erosion in full sun, and does well in dry clay. The midsummer seed heads are highly ornamental, as you can see in this image. (Doesn’t it just make you want to take out your lawn?)”