Prepared by Jennifer L. D’Appollonio, Assistant Scientist, University of Maine, Orono, ME 04469. Updated February 2018. Scientific name: Elymus repens  (L.) Gould; old Agropyron repens L. (Beauv.) Common name(s): quackgrass, couch grass, dog grass, quickgrass, scutch, quitch, twitch, witchgrass, creeping wild-rye Link(s): USDA PLANTS Profile, Go Botany Images: (to see enlargements [PC]: click on image,