Flora of North America species comparison

20–90 cm;

vegetative culms inconspicuous with few leaves clustered at apex.

obtusely trigonous in cross section, 45–100(–160) cm, smooth.

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.

ligules 3–12 mm, mostly longer than wide;

blades yellowish or light green, widest leaves 1.8–6 mm wide, smooth or sometimes papillose, especially distally.

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–)5–30(–45) cm;

proximal (1–)2–3 spikes pistillate, erect or the proximal spreading, aggregated or the proximal sometimes remote, ovoid to short-cylindric.

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.

spreading or the proximal somewhat reflexed, yellowish green, 22–34-veined, inflated, ovate to narrowly ovate, 6.4–10.7 × 2–3.5 mm, 2.6–3.9 times as long as wide, apex contracted;

beak 1.3–3 mm.

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

2.8–3.6 × 1.6–2.2 mm.

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 ovate, 1/3–2/3 as long as perigynia, apex acute to acuminate.

2.3–5.1 mm.

= 68, 70.