Rough Bluegrass - Poa trivialis
Other Names:
Rough-stalked Bluegrass, Rough Meadow-grass, Scribner's Bluegrass
Perennial rhizomatous. Stems loosely bunched, 40–100 cm tall, often decumbent and rooting at nodes. Leaves: blades 2–5 mm wide, lax, somewhat scabrous, ligules 3–10 mm long. Inflorescence an oblong open panicle 8–25 cm long. Spikelets 3–5 mm long. Lemmas 2.5–3.5 mm long, with a cobwebby base, keeled (Lavin in
Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).