Duckweed Size Comparison (image) DOE/Joint Genome Institute Caption Spirodela is one of the smallest plants in the world. Here it is displayed with other comparable plants. Credit Wang W, Kerstetter RA, Michael TP. Evolution of Genome Size in Duckweeds (Lemnaceae). Journal of Botany 2011, 1-9 (2011). Usage Restrictions please credit. 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.