Flora of North America species comparison

to 100 cm × 2 mm, scabrous.

21–67 cm × 0.7–1.4 mm, smooth or papillose.

sheath fronts spotted red-brown or pale brown, apex truncate or short-convex, membranous or hyaline, rugose;

ligule retuse or rounded, to 2 mm, free limb to 0.2 mm;

blades 120 cm × 5 mm, longer than flowering stem.

ligule of distal leaf (2.5–)3.4–6.8(–7.4) mm, 1.5–3 times as long as wide;

blades 2.4–5.9 mm wide, widest blade 2.8–5.9 mm wide.

spicate, (3–)7–10 cm × 15 mm, with 10–15 branches, the proximal branches distinctly separate; the proximal internode to 25 mm;

bracts setaceous, those subtending at least the proximal lateral branches conspicuous.

(17–)34–43(–68) mm;

proximal internode 4.1–16(–40) mm;

proximal bract (11–)16–26(–61) mm, awn (9–)13–23(–59) mm;

spikes 5–7, usually gynecandrous;

proximal spikes with 2 staminate and 11–23 pistillate flowers, 8–15 × 3.3–5.8 mm;

terminal spikes usually with 2–4 staminate and 16–20 pistillate flowers, 9–12.7 × 4.2–5.7 mm.

green to pale brown, veinless on both faces or 3-veined abaxially, body ovate or elliptic, 2–3.2 × 1.3–1.8 mm, base obtuse;

beak 0.8–1.2 mm, 1/3–1/2 length of perigynium.

ascending to erect, green to pale brown, 0–3-veined abaxially, prominently to weakly 0–2-veined adaxially, ovate to narrowly ovate, 3.3–3.9(–4.4) × 1.1–1.5 mm, 2.3–3 times as long as wide, apex abruptly contracted to gradually tapering;

beak 0.9–1.5(–1.7) mm, (0.28–)0.3–0.38 times as long as perigynia, margins serrulate, apex entire or bidentulate, teeth to 0.3 mm, 0–0.08 times as long as perigynia.

red-brown, ovate, 1.2–1.4 × 1 mm, glossy.

1.5–1.8(–1.9) × 0.9–1.4 mm, 1.2–1.5(–1.7) times as long as wide.

pale brown, hyaline, awn to 3 mm.

scales with whitish to stramineous margins, 2.6–3.3 × 1.2–1.8 mm, body (2.3–)2.7–3.8, apex acuminate to short-awned, awn to 0.7 mm.

scales with whitish to stramineous margins, 1.9–2.8 × 1–1.3 mm.

1.8–1.9 mm.

1.3–1.8 mm.

= 52.

= 54.