Deyeuxia boormanii

Weakly tufted perennial, culms decumbent to erect, to 130 cm high. Leaves slightly scabrous, strongly ribbed; blade flat, to 30 cm long and 6 mm wide; ligule obtuse, 1–5 mm long. Inflorescence a very loose panicle 20–35 cm long, with fine, spreading or deflexed branches. Spikelets 2.5–3 mm long, plump, green or slightly purplish; glumes acute, sub-equal, scabrous along the keel, bulging about the lemma; lemma subequal to glumes, ovoid, smooth, hardly thickened, but the 5 nerves prominently raised, awned from just below the apex, or occasionally unawned; awn when present to 0.3 mm long, not or barely exceeding lemma; callus hairs very dense, about half as long as lemma or slightly more; rachilla bristle c. 1 mm long, plumose with stiff hairs to c. 1.2 mm long. Flowers Jan.–Feb.