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Several species of wheat-grass, Agropyron, are of settled agricultural value. The common couch-grass, Agropyron repens, is a good hay-grass, despite its tenacity as a weed.
(noun)
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A. pseudorepens, the false couch-grass of the Great Plains, is a softer plant than the last and is hence better suited to cultivation for hay.
(noun)
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The couch-or quitch-grass, Agropyrum repens; also, any wild grass of the genus Agropyrum or Triticum.
(noun)
The Century Dictionary (Public Domain)