Purple Straw Wheat (IMAGE) Clemson University Caption Brian Ward is planting the Purple Straw wheat plants farther apart than usual to encourage the growth of multiple tillers. Credit Jim Melvin / Clemson University Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.