Deyeuxia carinata

Tufted or rhizomatous, glabrous perennial, culms erect, to 40(–90) cm high. Leaf-blades slightly scabrous, flat or folded, to 10 cm long and c. 5 mm wide, rather stiff, keeled at the apex with a thickened, incurved point, green; ligules obtuse, 2–6 mm long. Inflorescence a dense, cylindric panicle, 4–10(–15) cm long. Spikelets 4–6 mm long, usually purplish; glumes equal and acute, or the upper slightly longer and acuminate, keeled, scabrous along the keel; lemma slightly shorter than spikelet, acute to obtuse, sometimes bifid at apex, scabrous in the upper part, usually smooth and shining near base, awned from a little above midway; awn about as long as lemma, twisted near base; callus hairs c. 1 mm long; rachilla bristle glabrous to sparsely hairy, c. 0.5–1 mm long. Flowers Dec.–Mar.