| Author | (Ard.) P. Beauv. | |
| Distribution | This strongly invasive exotic has recently spread from VA into northern and western NC -- a photo record on iNaturalist from the Blue Ridge Parkway in Surry County in June 2022 and a second photo record from madison County in 2023. Additional records (sadly) will certainly follow. This species needs to be eliminated whenever and wherever possible!
Native to Eurasia, from southern Europe into southern Asia. | |
| Abundance | Very rare as of September 2023, but likely will quickly spread farther southward in upcoming years. All plants found at the Madison Co. site were pulled by Joe Lovenshimer (Sept. 2023). | |
| Habitat | Probably forest edges. The Madison Co. record is from a disturbed site scheduled for reclamation; 35.883422; -82.497415. | |
| Phenology | | |
| Identification | This grass has very wrinkled -- highly corrugated -- leaves, typically about 6-8 parallel wrinkles on a given leaf, giving a leaf a banded (pale green and darker green) look to the lanceolate several-inch-long leaves.
Note also longer=tapered tip to leaf, unlike O. setarius. | |
| Taxonomic Comments | This key was developed by B.A. Sorrie:
The leaf sheaths and culm axis are pilose with hairs 3-5 mm long; hairs on the leaf surfaces are similarly long; the leaf length ranges from 2.5-10 cm, the longest leaves with long-acuminate tip ……undulatifolius
Leaf sheaths and culm axis glabrate to pilose (usually sparsely, but dense at sheath summit) with hairs less than 1.5 mm long; hairs on the leaf surfaces similarly long; the leaf length ranges from 1.5-6 cm, the longest leaves with acute to acuminate tip (but not long-acuminate) ………………setarius
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| Other Common Name(s) | | |
| State Rank | SE | |
| Global Rank | GNR | |
| State Status | | |
| US Status | | |
| USACE-agcp | | |
| USACE-emp | | |
