Flora of North America species comparison

20–90 cm;

vegetative culms inconspicuous with few leaves clustered at apex.

trigonous, scabrous-angled distally, (30–)40–120 cm;

vegetative culms somewhat taller.

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;

sheaths glabrous, inner band green, veined, apex hyaline, prolonged 1–4.5 mm;

ligules 2.2–8 mm;

blades 2.5–4.6 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.

nearly cylindric, except near apex, 2.5–7(–9) cm;

spikes ascending, ovate, 3.2–11 × 1.1–7 mm, basal spikes slightly more prominent than middle spikes.

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

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.

(2.5–)2.8–4.1(–4.6) × 1.3–2 mm;

beak 0.4–1(–1.2) mm.

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

brown.

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 pale brown to straw colored at maturity, hyaline margins, ovate, apex acute to acuminate, glabrous.

scales pale brown to straw colored, narrowly ovate, apex acute, glabrous.

= 68, 70.