Flora of North America species comparison

20–90 cm;

vegetative culms inconspicuous with few leaves clustered at apex.

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

sheaths white-hyaline or green-veined, sometimes papillose, summits U-shaped, not distally expanded;

distal ligules 2.2–6 mm;

blades 3–4 per fertile culm, 11–25 cm × 1.7–4.2 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.

mostly dense, brown, 1.1–3 cm × 5–14 mm;

proximal internode 1–4 mm; 2d internode 1.4–3.4 mm;

proximal bracts scalelike, with bristle tips shorter than inflorescences.

3–10, usually overlapping, ovoid to globose, 4–10 × 3–7 mm, base rounded or truncate, apex rounded.

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 to ascending-spreading, light to dark reddish brown, conspicuously 3+-veined abaxially, faintly or basally 1–3-veined adaxially, winged to base, ovate or elliptic, plano-convex, 2.5–3.8 × (1–)1.2–2 mm, 0.35–0.45 mm thick, 1.9–2.5 times as long as wide, margin flat, including wing 0.2–0.5 mm wide, 1b ciliate-serrulate at least distally;

beak reddish brown at tip, flat, ± ciliate-serrulate, abaxial suture with reddish brown-hyaline margin, distance from beak tip to achene 1.2–2.2 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.

ovate or elliptic, 1–1.3 × 0.6–0.9 mm, 0.3–0.4 mm thick.

1.9–2.5(–2.9) × 1.2–1.6(–1.7).

scales reddish brown, usually with green or whitish to brown midstripe, lanceolate, 2.5–3.5 mm, shorter and narrower than perigynia, apex acuminate or acute.

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.

= 68, 70.