Definition of needlegrass

  1. 1 :  any of several grasses of the genus Stipa (especially S. comata) of the western U.S. with filiform leaves and slender awns on the spikelet

  2. 2 :  any of several grasses of the genus Aristida (especially A. longiseta) of the western U.S. furnishing poor forage —called also triple-awned grass

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a brief usually trivial fact

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