North American grass with slender brushy panicles; often a weed on cultivated land

[ Syn: witch grass , old witchgrass , old witch grass , tumble grass , panicum capillare ]

European grass spreading rapidly by creeping rhizomes; naturalized in North America as a weed

[ Syn: dog grass , couch grass , quackgrass , quack grass , quick grass , witch grass , agropyron repens ]