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Definition of needlegrass
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 : 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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Merriam-Webster unabridgedWords at Play
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