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any of the weedy grasses in the genera Alopecurus and Setaria of the family Poaceae. There are about 25 species of Alopecurus, distributed throughout the North Temperate Zone. Most species are perennial weeds, with dense, cylindrical, often brushlike, flower clusters that resemble foxes' tails. Meadow foxtail (A. pratensis), which is native to Eurasia, is used as a forage grass in northern North America; it stands 30 to 80 centimetres (about 12 to 30 inches) high and has a light-green flower cluster 7 cm long.