Cierra Sullivan (IMAGE) Clemson University Caption Clemson University graduate student Cierra Sullivan used herbarium specimen data in her research linking temperature and aridity changes to flower color changes over the past 124 years. Credit Clemson University College of Science 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.