Barnyard Millet, Common Barnyardgrass, Water Grass

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Barnyardgrass is a summer annual grass that germinates from late winter or early spring to through the summer. It inhabits agricultural land and other disturbed areas. Barnyardgrass characteristics are highly variable from plant to plant.
Flowers bloom from June through October. They range from 2-1/2 to 10 inch (6.4–25.4 cm) long and consist of branches densely clustered with knot-like flowers. Upper branches are stiff and stand erect to somewhat erect from the flowering stem. Lower branches spread farther apart than the upper branches. The flower head is held erect or droops and is sometimes purplish.