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Coarse tussocky perennial; culms 20–90 cm. high, erect.. Leaf-blades flat, 10–30 cm. long, 3–6 mm. wide.. Panicle elliptic, 15–30 cm. long, diffuse, with slender often flexuous branches and pedicels.. Spikelets 4–8-fiowered, narrowly oblong, 3–7 mm. long, 1–2 mm. wide, dark purplish green, the florets untidily spreading, breaking up from the apex with the rhachilla fragile, or from the base with the rhachilla persistent; glumes narrowly ovate, subequal, 1.5–2.7 mm. long; lemmas ovate-elliptic, 2–3 mm. long, firmly membranous, the lateral nerves indistinct, acute to sharply acute; palea smooth or scaberulous on the keels, persistent; anthers 3, 1–1.2 mm. long.. Caryopsis oblong, 1.2 mm. long.. Fig. 60/7, p. 190.
Coarsely caespitose perennial without rhizomes or stolons; culms up to 90 cm tall, erect, branched or unbranched, glabrous at the nodes, eglandular; basal leaf sheaths glabrous, chartaceous, compressed and keeled, eglandular, persistent; ligule a line of hairs; leaf laminas 10–35 cm × 3–10 mm, linear, flat (involute when dry), glabrous to pilose with tubercle-based hairs, eglandular.
Panicle 15–33 cm long, elliptic, diffuse with slender, sometimes flexuous, branches and pedicels, the spikelets evenly distributed on pedicels (5)10–25 mm long, the primary branches not in whorls, terminating in a fertile spikelet, glabrous in the axils, eglandular.
Caryopsis 0.8–1.2 mm long, oblong to elliptic.
