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Compactly caespitose perennial; culms 30–90 cm. high, erect.. Leaf-blades involute or sometimes flat, 8–20 cm. long, 1–3 mm. wide.. Panicle narrowly ovate, 7–25 cm. long, open.. Spikelets 5–10-flowered, slenderly linear, 5–11 mm. long, 1 mm. wide, the lemmas purple with yellowish tips, breaking up from the base, the rhachilla persistent; glumes lanceolate, unequal, the lower very small, 0.3–0.8 mm. long, the upper 1–1.7 mm. long; lemmas ovate-elliptic, 2–2.6 mm. long; palea smooth on the keels, persistent; anthers 3, 1–1.8 mm. long.. Caryopsis oblong, laterally compressed, 1 mm. long.. Fig. 62/10, p. 196.
Densely caespitose perennial without rhizomes or stolons; culms up to 90 cm tall, erect, terete and somewhat wiry, unbranched, glabrous at the nodes, eglandular; basal leaf sheaths glabrous, chartaceous, terete, eglandular, long-persistent; ligule a line of hairs; leaf laminas 8–20 cm × 1–3 mm, linear, usually involute, sometimes flat, glabrous or thinly pilose, eglandular.
Panicle 7–25 cm long, narrowly ovate, loose and open, the spikelets evenly distributed on pedicels 1–5 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, laterally compressed.
