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knotgrass Definition

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knotgrass
noun(knot-grass)
a cosmopolitan prostrate weed (Polygonum aviculare) of the buckwheat family with jointed stems, prominent sheathing stipules, and minute flowers; broadly : any of several congeneric plants
knotgrass
noun(knot-grass)
any of several grasses (such as Paspalum distichum) with markedly jointed stems

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