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Tufted perennial; culms 30–70 cm. high, erect or ascending.. Leaf-blades flat, 8–25 cm. long and 2–3 mm. wide, glabrous.. Panicle contracted, subspiciform, 5–20 cm. long, the branches fascicled and densely spiculate.. Spikelets oblong, 3–5 mm. long, green or purple; glumes persistent, lanceolate, 1-nerved, finely scaberulous, the upper a little shorter; lemma oblong-ovate, 2–2.5 mm. long, up to 2/3 as long as the spikelet, glabrous or sparsely pilose, 5-nerved, the outermost nerves excurrent into mucros, awned from one-quarter the way up the back or less; awn geniculate, 2–4 mm. long; palea one-quarter to one-third as long as the lemma; rhachilla usually not prolonged.
Coarse, tufted perennial 600-900 mm high. Leaf blade to 250 x 6(-8) mm. Inflorescence dense, narrow, spike-like; spikelets overlapping, closely imbricate on adpressed branches. Spikelet ± 5 mm long; rachilla not produced; glumes 5 mm long, lanceolate, mucronate, keel scabrid; lemma glabrous or sparsely hairy, 5-nerved, awned from 1/4 the way up back or less; awn geniculate; palea 1/4-1/3 as long as lemma; callus glabrous to tufted hairy, up to 1/3 the lemma length; anther 0.7-1.5 mm long.
Lemma 2-2.5 mm. long, 5-nerved, ovate-oblong, thinly membranous, apex with the lateral nerves excurrent into short mucros, glabrous or somewhat pilose, dorsally awned from the lower 1/2; awn 2-4.5 mm. long, geniculate.
Coarse perennial, tufted, up to 0.9 m high. Leaf blades up to 250 mm long, up to 6(-8) mm wide. Spikelets ± 5 mm long, overlapping. Inflorescence dense, narrow and spikelike.
Glumes 1-nerved, slightly unequal in size (the inferior slightly longer), lanceolate, apex acute, flanks scaberulous, scabrous along the keel.
Culms 25-60(80) cm. tall, erect or ascending from a slightly geniculate base, rather slender, simple or rarely branched, 2-4-noded.
Panicle 5-22 cm. long, erect, straight, contracted, spike-like, with the branches densely fascicled and densely spiculate.
Leaf-laminae 7-25 x 0.2-0.3 cm., usually expanded, tapering to a somewhat pungent point, firm.
Palea 1/4-1/2 (rarely 4/5) the length of the lemma, faintly 2-nerved, with the apex 2-dentate.
Leaf-sheaths fairly tight, smooth or scaberulous especially towards the mouth.
Spikelets 3-5 mm. long, green, often tinged with purple, gaping.
Anthers 1-1.5 mm. long.
A caespitose perennial.
