Flora of North America species comparison

to 80 cm × 3–8 mm, scabrous.

straight, (40–)65–110(–125) cm, tallest culms 65–125 cm.

sheath fronts not spotted, slightly thickened near hyaline margins, apex convex, membranous, rugose;

ligule retuse or rounded, to 3 mm, free limb to 0.2 mm;

blades 60 cm × 5 mm, shorter than flowering stem.

of flowering stems shorter than culms, to 28 cm × 1.8–3.8 mm;

ligules on distal cauline leaves truncate or rounded.

spicate, 3–7 cm × 15–25 mm, with 10–15 branches, proximal branches not distinctly separate; the proximal internode to 10 mm;

bracts setaceous, usually only the proximal conspicuous.

peduncles of terminal staminate spikes (3–)10–60(–102) mm, 0.7–2.5 length of staminate spikes;

bracts 5–25 cm × 1.2–2.5 mm, 0.5–1.3(–1.9) times as long as inflorescences;

inner band of sheaths usually concave or truncate (occasionally convex).

proximal pistillate spikes 1–2(–3), distant, sessile or short-pedunculate, globose to ellipsoid or short-cylindric, 7–27 × 8–11 mm;

terminal staminate spikes pedunculate, (9–)17–39 × 1.4–2.5 mm.

pale brown, body broadly ovate, 3.2–4 × 2–2.6 mm, base rounded or cordate, apex abruptly contracted to beak;

beak 1.3–1.5 mm, 1/3 length of perigynium.

reflexed, yellow to yellowish green, (3.5–)3.9–5.2(–5.8) × 1.4–2.2 mm, apex abruptly narrowed;

beak forming angle greater than 20° with body, 1.4–2.2 mm, sparsely scabrous or, occasionally, smooth.

brown, ovate, 1.5–1.9 × 1.2–1.6 mm, dull.

1.4–1.9 × 1.2–1.5 mm.

hyaline, pale brown, becoming colorless with green midrib, awn usually not longer than the body.

pistillate scales pale yellowish green, inconspicuous among perigynia, 2.1–3.3 × 0.9–1.3 mm; staminate scales reddish brown to pale brown, narrowly obovate to narrowly oblong, 2.9–5.6 × 1.2–1.9 mm, margins wide, pale hyaline, apex obtuse to acute.

2.1–3.6 mm.