Hemerocallis fulva
Orange daylily is a popular ornamental that has escaped and is invaded natural and disturbed areas throughout the United States. Leaves are long, grass-like, and bright green in color. Flowers are large, showy, and orange in color. Flowers may have spots or stripes. Many cultivars of daylily now exist displace a wide variety of sizes and flower colors. Orange daylily infestations often occur adjacent to plantings or in old homesites. Areas invaded include meadows, forests, floodplains, ditches, and forest edges. Once established, the thick tubers make control difficult. Orange daylily is native to Europe and was introduced into the United States in the late 19th century as an ornamental.