Beaked Panic Grass, Coleataenia anceps, is a native warm season grass. It is mostly found in southern Illinois in disturbed, moist habitats. It grows between two and four feet tall and its leaves are keeled, which means it looks like the leaf blade and the sheath were folded in half and retain that crease. You can also see hairs along the edges of the leaf sheaths, although the density of these hairs can vary.
The ligule is short and membranous, looking like a brown line in this example. This grass produces a panicle inflorescence with oval-shaped spikelets with pointed tips, and they're arranged along sparse branches. If you catch it in bloom you can see purple anthers pushed out of the spikelets.
This video is part of the Grasses at a Glance series by Natural Resources, Environment, and Energy Educator Erin Garrett, University of Illinois Extension. Explore the playlist. Read our blog Grasses at a Glance.