Students for Stewardship The Cork Board
← Back to the library

Basketgrass

Oplismenus undulatifolius (ah-PLIS-meen-us un-dul-LAY-ti-foal-ee-us)

Family: Poaceae Non-native Herbaceous (1-3 ft)

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, 1Β½ - 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.

Source: NC State Extension Gardener Plant Toolbox ↗ NC State Extension Gardener Plant Toolbox, 46 attributes.

How it fits the guild

Guild layer 4 - Herbaceous (1-3 ft)
See companions & conflicts ↓

Companions & Conflicts

Curated pairwise relationships between this plant and others in the library — who feeds whom, who competes, who confuses the pests. Green reads as a good pairing, red as one to avoid.

No curated interactions recorded for this species yet.

Also noted by NC State

Related species the NC State Plant Toolbox flags for this plant — look-alikes to tell apart, and plants that play a similar role in a planting. Ones we carry in the library are linked.

Often confused with Microstegium vimineum

Full plant profile

Growing Conditions
Plant type
Ground Cover; Herbaceous Perennial; Weed
Life cycle
Perennial
USDA zones
6a, 6b, 7a, 7b, 8a, 8b, 9a, 9b, 10a, 10b, 11a, 12a, 12b, 13a, 13b
Light
Dappled Sunlight (Shade through upper canopy all day) | Deep shade (Less than 2 hours to no direct sunlight)
Soil drainage
Moist
Mature size
Height: 0 ft. 8 in. - 1 ft. 0 in. | Width: 2 ft. 0 in. - 5 ft. 0 in.
Growth rate
Rapid
Maintenance
High
Canopy layer
4 - Herbaceous (1-3 ft)
Form & Appearance
Habit / form
Creeping; Horizontal; Multi-stemmed; Spreading
Texture
Medium
Leaf color
Green
Leaf type
Sheath; Simple
Leaf arrangement
Alternate
Leaf shape
Lanceolate; Ovate
Leaf margin
Undulate
Leaf size
1-3 inches long, < 1 inch wide
Hairs present
Yes
Leaf detail
The wavy green leaves are elongated ovate with sharp pointed tips. They are 1.5-5 inches long and 1/2 inch wide. Sheathes and stems have short hairs
Flower color
Purple/Lavender; White
Flower form
Spike
Flower size
< 1 inch
Flower detail
Spikelets have lower bracts and very long awns (extended pointed tips) that are sticky and reddish-purple to white. Blooms in the fall
Bloom time
Fall
Fruit color
Brown/Copper
Fruit type
Caryopsis
Fruit detail
Forms long sticky awns with 3-5 pairs of seeds that adhere to clothing and fur
Stem color
Green
Stem detail
Stems are thin and pubescent with white hairs and root at the nodes
Wildlife & Ecology
Native status
Non-native
Origin
Southern Europe and Asia
Food & Medicine
Harvest time
Fall; Winter
Fruit type
Caryopsis
Landscape Use
Garden tags
#aggressive #perennial grass #weedy grass #shade tolerant #high maintenance #weedy
Problems & Resistance
Other problems
Weed Management
Problems
Weedy
Resistant to
Heavy Shade

Planted at Hunnicutt

Nobody’s planted this one yet.