Millet is a confusing term used broadly to describe five completely different genera of plants: foxtail millet (Setaria italica), proso millet (Panicum miliaceum), Japanese millet (Echinochloa frumentaceae), brown top millet (Panicum ramosum), and pearl millet (Pennisetum glaucum). While the others are used primarily as food crops around the world, pearl millet is one type of millet used mainly as an ornamental plant in the United States.