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Caespitose perennial; culms 60–120 cm. high, erect.. Leaf-blades usually flat, 10–45 cm. long, 2–10 mm. wide; sheaths densely pilose.. Panicle broadly linear to narrowly oblong, 8–50 cm. long, copiously branched, the spikelets evenly distributed, mostly on short slender pedicels from the secondary branches; branches and pedicels scaberulous.. Spikelets 4–9-flowered, broadly ovate, 2–3 mm. long, purplish, breaking up from the apex, the rhachilla fragile; glumes narrowly ovate, subequal, 1.2–1.5 mm. long, minutely scaberulous, acute to acuminate; lemmas oblong, 1.3 mm. long, minutely scaberulous all over, broadly obtuse, rarely mucronate; palea-keels ciliate with hairs 0.5–0.7 mm. long; anthers 3, 0.7–1 mm. long.. Caryopsis narrowly ellipsoid, 0.5 mm. long.. Fig. 60/1, p. 190.
Robust caespitose perennial without rhizomes or stolons; culms up to 150 cm tall, erect, unbranched, glabrous at the nodes (but the internodes densely pilose to glabrous), eglandular; basal leaf sheaths glabrous to shortly pilose below (elsewhere the sheaths glabrous to pilose), chartaceous to firmly chartaceous, terete, eglandular, persistent; ligule a line of hairs; leaf laminas 7.5–20(25) cm × 2.5–6(8) mm, linear, flat or with involute margins, glabrous to pilose, scaberulous, eglandular.
Panicle 8–50 cm long, broadly linear to narrowly oblong, loose or rather dense, the spikelets evenly distributed on short slender pedicels up to 0.8 mm long, the primary branches not in whorls, terminating in a fertile spikelet, loosely pilose in the axils, eglandular.
Caryopsis 0.5–0.6 mm long, narrowly elliptic.
