Bush-clover is the butterfly host plant for the Gray Hairstreak and Eastern-tailed Blue. It is also nutritious native legume that is readily grazed by livestock and upland game birds consume the seeds. The Pawnee called this plant "rabbit foot" because of the shape its flower heads. The roots of round-head bush clover grow 5-8 feet long. Like other members of the pea or legume family, the roots of the round-head bush-clover contain nitrogen-fixing organisms that convert nitrogen from the air to a form that other plants can use.