Flora of North America species comparison

20–90 cm;

vegetative culms inconspicuous with few leaves clustered at apex.

30–80 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.

3.9–8.7 mm wide, glabrous.

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.

(1–)2–4(–6), erect;

lateral spikes usually pistillate;

terminal spike gynecandrous; staminate portion 4–11 × 1–3.5 mm; pistillate portion oblong to elliptic, 10–43 × 10–16 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.

appressed-ascending, the proximal not reflexed, 5.5–7.8 × 2–3 mm, smooth;

beak 2.3–2.9 mm, often sparingly scabrous.

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

sides often concave, 2–2.6 × 1.4–1.7 mm, 1.2–1.9 times as long as wide;

style deciduous, straight.

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 2.3–5.5 × 1.2–1.7 mm, apex acute, sharp or blunt, hidden by perigynia.

scales 4.2–5.8 × 1.4–2 mm, apex acute, sharp or blunt.

= 68, 70.