Knotgrass meaning

nŏtgrăs
A low-growing, weedy grass (Paspalum distichum) with spikelets arranged in two rows along the rachis.
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Any of several weedy plants of the genus Polygonum having stems with nodes.
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Any of several weedy plants (genus Polygonum) of the buckwheat family; esp., a common weed (P. aviculare) with slender stems, narrow leaves, and small axillary flowers.
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A creeping grass (Paspalum distichum) growing in wet places in the S U.S.
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An annual plant, Polygonum aviculare, found in fields and wasteland.
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