Phragmites (IMAGE) Penn State Caption The invasive grass Phragmites, or common reed, can be seen growing on the edges of many gas well pads in Pennsylvania. Credit Mortensen's Lab, Penn State Usage Restrictions Non commercial use only 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.