Meaning : North American grass with slender brushy panicles. Often a weed on cultivated land.
Synonyms : old witch grass, old witchgrass, panicum capillare, tumble grass, witchgrass
Meaning : European grass spreading rapidly by creeping rhizomes. Naturalized in North America as a weed.
Synonyms : agropyron repens, couch grass, dog grass, quack grass, quackgrass, quick grass, witchgrass