couch grass

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couch grass,

name for several grasses, among them quack grassquack grass
or couch grass,
Old World perennial grass (Agropyron repens), now widely distributed and in the United States a troublesome weed. It somewhat resembles a beardless wheat and has creeping, yellowish rootstalks, the joints of which, even though
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couch grass

a grass, Agropyron repens, with a yellowish-white creeping underground stem by which it spreads quickly: a troublesome weed