Flora of North America species comparison

densely tufted, lateral, ascending or lax to decumbent, distinctly winged, 10–62 cm × 2–2.4 mm;

basal sheath light brown to brown, the proximal frequently wine-red or purple, small, triangular.

31–115 cm × 0.9–2 mm, smooth, serrulate, or scabriduous at mid height.

sheaths 2–15 mm;

blades ascending, midrib well developed, 2 lateral veins conspicuous, slightly more so than other veins, flat, thin, 10–35 cm × 10–38 mm, widest leaf 13–38(–62) mm wide, blades of overwintering leaves smooth.

ligule of distal leaf (2–)3.5–7.1 mm, 2–3.9 times as long as wide;

blades 1.8–5.9 mm wide, widest blade 2.3–5.9 mm wide.

1.4–2.6 cm × 3.9–2.2(–3.2) mm;

bract blades of distal lateral spikes lanceolate or narrowly lanceolate, wider than spikes, concealing them, widest bract blade of distalmost lateral spike (2.9–)3.2–8.3 mm wide.

peduncles of proximal spikes to 5.8 cm; of terminal spike absent.

(33–)40–89(–103) mm;

proximal internode 6–32 mm;

proximal bracts 14–43 mm, awn 10–39 mm;

spikes 5–9, usually gynecandrous;

proximal spikes usually with 1–4 staminate and (14–)18–31(–40) pistillate flowers, 12–22(–25) × 3.9–6.5 mm;

terminal spikes usually with 1–5 staminate and 14–28 pistillate flowers, 9.6–16 × 3.4–6.2 mm.

4(–5) per culm;

lateral spikes 6–36 × 3–4.2 mm;

terminal spike erect, linear, 4–18 × 1.2–1.6 mm, often hidden by distal 2 pistillate spikes and distal bract blade, frequently exceeded by distal 2 pistillate bracts.

3–20 per spike, strongly to loosely overlapping, erect or ascending, obovate, 3–4.2 × 1.8–2.1 mm;

beak abruptly bent, 0.3–0.6 mm.

erect to appressed-erect, green to brown, prominently to weakly 3–7-veined abaxially, prominently to weakly 0–3(–6)-veined adaxially, narrowly lanceolate, 3.4–5.2 × 1.1–1.4 mm, 2.9–4 times as long as wide, apex abruptly contracted to gradually tapering;

beak 1.5–2.5 mm, 0.4–0.53 times as long as perigynia, margins serrulate, apex bidentulate, teeth (0.2–)0.3–1 mm, (0.06–)0.09–0.2 times as long as perigynia.

ovoid, 2.5–3.8 × 1.6–1.8 mm.

1.5–2.1 × 0.9–1.3 mm, 1.3–1.8 times as long as wide.

scales oblong, 2.8–3.2 × 1.4–2 mm, apex obtuse or truncate, awnless (sometimes mucronate).

scales with whitish to castaneous margins, (2.2–)2.5–4.1 × 1.4–2 mm, body 2.2–2.9(–3.1) mm, apex acuminate to short-awned to 1.5 mm.

scales oblong ovate, 2.8–3.2 × 1.4–2 mm, margins hyaline, apex obtuse.

scales with whitish to castaneous margins, 3.1–4.3 × 1–1.5 mm, apex acute to short-awned.

2–2.2 mm.

1.3–1.8 mm.

1.8–2.5 mm.

= 44.