Dig deeper at SERNEC, a consortium of southeastern herbaria.
Check out EDDMapS.org to see where this has been reported.
Ryegrasses or Wild-ryes (genus Elymus) are noted by their evenly spaced leaves and elongate, terminal inflorescence that recall cultivated rye or wheat. Each floret produces several long, skinny awns per the Vascular Plants of North Carolina website.
Spermatophytes (seed plants): Angiosperms (flowering plants): Monocots: Commelinids: Poales
Manual of the Grasses of the US (Hitchcock & Chase, 1950)
Quackgrass, Dog-grass, Witchgrass
Click or hover over the thumbnails to see larger pictures.
Steve Dewey, Utah State University, Bugwood.org bug_1459493
With yellowish creeping rhizomes, per Manual of the Grasses of the United States.
Steve Dewey, Utah State University, Bugwood.org bug_1459494
Dense rhizomatous perennial. Blades to 3dm long, 3-16mm wide, per Vascular Flora of the Carolinas.
Ohio State Weed Lab Archive, The Ohio State University, Bugwood.org bug_1559008
Green or glaucous, per Manual of the Grasses of the United States.
Ohio State Weed Lab Archive, The Ohio State University, Bugwood.org bug_1559039
Spike 5-15cm long; spikelets mostly 4-6 flowered, 1-1.5cm long, per Manual of the Grasses of the United States.
Julia Scher, Federal Noxious Weeds Disseminules, USDA APHIS ITP, Bugwood.org bug_5376440
Bruce Ackley, The Ohio State University, Bugwood.org bug_5438236
Nodes and internodes glabrous, per Vascular Flora of the Carolinas.