<i>Spirogyra pratensis</i> (IMAGE) University of Maryland Caption These are microscopic images of Spirogyra pratensis filaments showing the spiraling green chloroplasts for which Spirogyra is named. Credit Bram Van de Poel 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.