Flora of North America species comparison

25–60(–85) cm;

vegetative culms with few leaves clustered at apex.

densely tufted, slightly winged, 9.2–56 cm × 0.8–1.1 mm.

sheaths adaxially white-hyaline, summits U-shaped;

distal ligules 1.5–6 mm;

blades (2–)3–4(–5) per fertile culm, 7–22 cm × 2–4 mm.

basal sheaths brown or light brown;

sheaths 1–40 mm;

blades erect, ascending, or lax, dark green, midrib well developed abaxially, margins serrulate distally, 6.2–17 × 2.8–32 cm, blades of overwintering leaves smooth Inflorescences: peduncles of lateral spikes absent; of terminal spike 1.3–7.3(–15) mm.

2–4, blade 1.2–21 cm × 2.6–11 mm, widest bract blade per plant 5.3–11 mm wide;

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

erect, usually dense, green, gold, or dark brown, 1.8–3 cm8–14 mm;

proximal internode 2–3(–5) mm; 2d internode 1–3 mm;

proximal bracts bristlelike, shorter than or equaling inflorescences.

6–14, distant, distinct, ovoid to broadly ovoid, 8–10 × 4.5–6.5 mm, base and apex acute to truncate.

4–5 per culm, lateral spikes 5.3–18(–23) × 3.7–4.6 mm, distal 2–3 spikes overlapping and concealed by bracts;

terminal spike linear, 5.8–13(–18) × 0.9–2.1 mm wide, proximal to or overtoppped by distal 2 bracts, usually exceeded by or, sometimes, subequal to distalmost lateral spike.

ascending, white to gold or light brown, 0–5-veined abaxially, 0–4-veined adaxially, narrowly lanceolate to narrowly ovate, flat except over achene or, occasionally, plano-convex, 3.4–4.1(–4.7) × 0.9–1.3 mm, 0.15–0.35 mm thick, margin flat, including wing 0.1–0.2 mm wide, usually crinkled distally;

beak brown or red-brown at tip, flat, ± ciliate-serrulate, abaxial suture inconspicuous, distance from beak tip to achene (1.8–)2.1–3 mm.

3–8(–14) per spike, spirally overlapping, aggregated, 29–34-veined, ovate or oblong, faces flat or slightly convex, 2.7–4.2(–5) × 1.3–1.7(–1.8) mm, base abruptly contracted to 0.1–0.2 mm stipe;

beak excurved 30–45° from long axis of perigynium, 0.2–0.6(–1) mm wide.

± elliptic, 1.1–1.5 × 0.6–0.8 mm, 0.15–0.35 mm thick;

style usually persistent, sinuate.

1.9–2.5(–2.9) × 1.2–1.6(–1.7).

scales gold to dark brown, with whitish, green, or brown midstripe, lanceolate, 3–3.8 mm, shorter and narrower than perigynia, apex acuminate to short-awned.

scales 1.1–4.2 × 1.4–1.8 mm;

body ovate, 1.1–2.2, margins usually whitish, apex acute and awnless or awned, awn 0–2.2 mm.

scales 1.9–3.8 × 0.8–1.5 mm, apex obtuse or acute, awnless.

1.8–2.3 mm.

= 52, ca. 66, 70.