Setaria viridis is a type of grass commonly known as green foxtail or wild millet. There are a few different synonymous names for this plant, including Setaria italica subsp. viridis and Panicum viride. Some other common names for Setaria viridis include green bristlegrass, wild foxtail, and pigeon grass. This plant is often considered a weed due to its ability to grow quickly and take over areas, but it also has some uses in agriculture as a forage crop and a cover crop. Additionally, Setaria viridis has been studied for its potential as a biofuel and for its ability to accumulate heavy metals from contaminated soil.