Smooth Pigweed (Common Pigweed)

Scientific Name - Amaranthus hybridus L. 
Family - Amaranthaceae

Tall annual with erect, smooth to hairy stems. Petioles long. Leaf blades oval with a sharp tip. Male and female flowers mixed in clusters in leaf axils and in large terminal panicles. Reproduces by seed. Found in fields, moist areas, roadsides, and disturbed areas. Occurs from Massachusetts, Michigan to Iowa, south to Florida, west to Arizona and California. Also found in Ontario, Quebec, the West Indies, Mexico, Central America, South America, Europe, Africa, Asia, and Australia.