Agrostis capillaris

Rhizomatous perennial (occasionally also producing stolons), culms erect, to 70 cm high. Leaves glabrous; blade flat or inrolled, smooth or slightly scabrous, to 20 cm long and 4 mm wide; ligule obtuse, to 2 mm long, mostly shorter than broad. Inflorescence an open (rarely strongly contracted) panicle, 2–20 cm long, the branches inclined to the rachis. Clavate apex of pedicel smooth. Spikelets 2–3.5 mm long, usually purplish-brown but occasionally wholly greenish; glumes subequal, firmly membranous, narrowly acute, the lower weakly scabrous along the keel above midway, the upper usually smooth along the keel; lemma membranous, truncate or the nerves exserted as short points, two-thirds to three-quarters as long as glumes; palea about half as long as lemma; anthers 1–1.5 mm long.