quackgrass (Agropyron repens (L.) Beauv.)

Images courtesy of Jed Colquhoun Photo Collection, Oregon State University

Image courtesy of Douglas Ladd @ USDA-NRCS PLANTS Database / USDA SCS. 1989. Midwest wetland flora: Field office illustrated guide to plant species. Midwest National Technical Center, Lincoln, NE.

Image courtesy of Weed Science Society of America