Queen of the Night Tulip (IMAGE) American Institute of Physics Caption The Queen of the Night tulip displays an iridescent shimmer caused by microscopic ridges on its petals that diffract light. Credit S. Vignolini/ Usage Restrictions This image may only be used with appropriate caption and credit. 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.