Pawpaw patch (IMAGE) Washington University in St. Louis Caption Anna Wassel’s team — dubbed the Pawpaw Patrol — investigated the effect of pawpaw on herbaceous community composition at Tyson Research Center, WashU’s environmental field station, located near Eureka, Mo. Credit Anna Wassel, Washington University in St. Louis Usage Restrictions For editorial purposes License Original 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.