witch grass

noun

1.
North American grass with slender brushy panicles; often a weed on cultivated land
old witch grass old witchgrass Panicum capillare tumble grass witchgrass
2.
European grass spreading rapidly by creeping rhizomes; naturalized in North America as a weed
quicken Agropyron repens couch grass dog grass quack grass quackgrass quick grass witchgrass