Setaria viridis
English: Green foxtail; Green bristlegrass; Wild foxtail millet.
Genus: ± 100 species; subspecies of Setaria italica.
Region: Eurasia.
Botany: hardy grass; habitat urban, cultivated, disturbed, vacant lots, sidewalks, railroads, lawns, margins of fields; annual; stem decumbent or erect; up to 1 to 2 meter high; leaf blades are up to 40 cm long glabrous.