Flora of North America species comparison

20–90 cm;

vegetative culms inconspicuous with few leaves clustered at apex.

18–80 cm.

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.

2.5–11.5 mm wide, sparingly scabrous.

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.

3–7(–9), erect;

lateral spikes pistillate with few staminate flowers at base and rarely also at apex, narrowly elliptic, 12–50 × 7–13 mm;

terminal spike usually staminate, sometimes gynecandrous, pistillate, or abortive, 6–45 × 2–6 mm.

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.

horizontal, 3.5–6 × 1.4–2.6 mm, minutely pustulate;

beak 1.3–2.2 mm, smooth.

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

obovoid, sides strongly concave, 1.4–2.1 × 1–1.4 mm, less than 2 times as long as wide;

style deciduous, straight or sinuous.

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 narrow, with indistinct body, 3.6–9(–11) × 0.1–0.4 mm, apex with long, scabrous awn exceeding perigynium.

scales loosely to irregularly imbricate with tips spreading, linear, 4.3–15 × 0.3–0.8 mm, apex with long, scabrous awn.

= 68, 70.