Lachnagrostis semibarbata

Tufted glabrous annual or short-lived perennial, culms ascending to erect, to c. 60 cm high. Leaf-blades folded, to 20 cm long and 1(–2) mm wide; ligules obtuse to acute, 1–8 mm long. Inflorescence a loose, open panicle, to 30 cm long, its base often enclosed by the upper leaf-sheath until maturity, then divaricately branched and breaking off below the lower branches. Spikelets 4–7.5 mm long (excluding awn), usually purplish (green when immature); glumes narrowly acuminate, the lower usually slightly longer, keeled toward the apex, smooth or scabrous along the keel which is sometimes drawn out into a seta to 0.4 mm long; lemma 3–5.5 mm long, 4-toothed at apex, at least 2 of the teeth developed into fine setae to 1.5 mm long, awned from near the middle; awn bent, exceeding spikelet by 2–7 mm; palea c. three-quarters as long as lemma; rachilla bristle plumose; anthers c. 1.5 mm long.