bur bristlegrass


Definition of bur bristlegrass 

: a Eurasian annual grass (Setaria verticillata) that is naturalized as a weed in North America especially in the northeastern states, is often tufted in appearance, and has spikelets with backward-barbed bristles

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History and Etymology for bur bristlegrass

burr (prickly envelope) + bristle grass

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occurring twice a year or every two years

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