Wavygrass Oplismenus undulatifolius

Wavyleaf basketgrass is an invasive perennial grass in the Poaceae (grass) family native to southern Europe and southern Asia. It has been found in Maryland and Virginia so far and is being watched closely for entry into NC. The NC Invasive Plant Council has it on the invasive list. There is a strong concern that it will become a serious problem in the southeast if nothing is done. Please watch out for wavyleaf basketgrass. It is unsure as to how it was introduced to the USA, possibly as a contaminant in the flower industry.

This weed grows along the ground and forms dense mats preventing other plants including tree seedlings from germinating. This shade-tolerant grass is found in full-canopy hardwood forests, forest margins, and shady riparian zones in both disturbed and undisturbed areas. 

The wavy leaves are ½” wide, 1½ - 4” long with short hairs along the leaf sheaths and stem. The plant roots along the nodes and stolons can grow several feet long. Flowers form from mid-September to November with sticky alternate spikelets. Seeds are sticky and adhere to clothes and fur. In winter the leaves turn brown.

Because the species has shallow roots, it can be easily hand pulled, which is thought to be the best method of control. Glyphosate has also been used. It is important for control to start before infestations become large.

Insects, Diseases, and Other Plant Problems: No nature enemies are known. Listed as invasive by the NC Invasive Plant Council, Va and MD. In WI it is prohibited. Invasive in other countries also.