|quackgrass (Elytrigia repens)||
quackgrass (Elytrigia repens; GRASS FAMILY [Poaceae]) An introduced perennial grass with erect stems (1½-3') and erect green or purplish spikes. Spreads extensively by rhizomes. Spikelets are well separated and several flowered. A good forage grass, but because of its rhizomes is as troublesome a weed as there is in Central Wisconsin. Flowers early in the summer. 
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