n = 21

Lax, bluish-green tufts to 140 cm, or solitary culms, from a slender creeping rhizome. Leaf-sheath closely appressed to culms, firmly membranous, striate, retrorsely scabrid or smooth, sometimes purplish. Ligule 0.5-2.7 mm, finely denticulate, abaxially glabrous. Leaf-blade (2.5)-5-12-(25) cm × (1.5)-2-7-(8.5) mm, slightly constricted at base and tapering gradually to acute tip, abaxially minutely retrorsely scabrid on ribs, adaxially scabrid or smooth, sometimes with scattered hairs; margins rather closely and finely scabrid. Culm decumbent and sometimes geniculate at base, erect above, upper internodes with scattered minute prickle-teeth and retrorsely scabrid below panicle, or all internodes smooth. Panicle 0.7-5.5 × 0.4-4.0 cm, ovate-globose to narrow-oblong with conspicuous bristling awns; rachis smooth, branches almost smooth, bearing a few scattered prickle-teeth. Spikelets 4-12-(20) mm, green or occasionally purplish. Glumes ≤ spikelet, lanceolate, acute, ± membranous, keel conspicuous, thickened, green-margined, ciliate. Lemma 3-4-(4.5) mm, 5-nerved, linear-lanceolate, finely scabrid above, apex minutely bilobed; awn (2.5)-3.5-9-(14) mm, stout, straight, finely scabrid. Palea ≤ lemma, keels and apex ciliate. Callus hairs 0.8-1.4 mm. Rachilla prolongation ⅓-½ length of palea, usually > 1 mm and hairy, or < 1 mm and glabrous. Lodicules minutely ciliate or glabrous. Anthers 0.9-1.5 mm. Ovary apex hairy. Caryopsis 1.5-2 × 0.6-0.8 mm. n = 21.