Oplismenus undulatifolius, commonly known as wavyleaf basketgrass, is a species of perennial grass from the Poaceae family that is native to South Asia, East Asia, Southeast Asia, Australia, and Southern Africa. It can be found in countries such as Pakistan (Punjab & Kashmir), China, Japan, Korea, India, Australia, South Africa, Madagascar and has since been introduced to the Mid-Atlantic United States. There are no recognized subspecies in Catalogue of Life.