• See Quitch grass.
Couch' grass` (gr?s`). (Botany) See Quitch grass . 
Couch-grass, also known as Quitch-grass and Quick-grass (Triticum repens), is a noxious weed whose spiked flowers somewhat resemble an ear of wheat in structure. It is a perennial grass and the rhizome spreads rapidly in all directions in light soil, sending up leafy stems from the nodes. Crouch-grass is also propagated by seeds. When it first appe...
(Elymus repens) Very common in crops and grassland, couch reproduces by rhizomes as well as seed making it a constant problem.
quackgrass noun European grass spreading rapidly by creeping rhizomes; naturalized in North America as a weed
European grass that spreads rapidly by underground stems. It is considered a troublesome weed in North America, where it has been introduced. (Agropyron repens, family Gramineae.)
Elymus repens
any of various grasses, esp. Agropyron repens, known chiefly as troublesome weeds and characterized by creeping rootstocks that spread rapidly. Also called