Annual Ryegrass (IMAGE) Colorado State University Caption Annual ryegrass, one of 10 selected species the International Weed Genomics Consortium will study. Credit Jessica Strauss/Australian Herbicide Resistance Initiative 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.