Flora of North America species comparison

to 80 cm × 3–8 mm, scabrous.

dark maroon at base; flowering stems 0.5–1.1 mm thick, 20–90 cm, much longer than leaves at maturity, glabrous, but often scabrous within inflorescence.

sheath fronts not spotted, slightly thickened near hyaline margins, apex convex, membranous, rugose;

ligule retuse or rounded, to 3 mm, free limb to 0.2 mm;

blades 60 cm × 5 mm, shorter than flowering stem.

sheaths glabrous or short-pubescent, basal few bladeless and maroon, others grading from maroon to green on back, pale brown-hyaline, red dotted and sometimes pubescent near apex;

blades flat, 3–9 mm wide, glabrous, minutely scabrous on margins distally.

spicate, 3–7 cm × 15–25 mm, with 10–15 branches, proximal branches not distinctly separate; the proximal internode to 10 mm;

bracts setaceous, usually only the proximal conspicuous.

peduncles of lateral spikes slender, to 40 mm, equaling spikes or usually somewhat shorter, scabrous;

peduncle of terminal spike to 13 mm, glabrous or scabrous;

proximal bracts shorter than inflorescences;

sheaths 20–25 mm;

blades 3–4 mm wide.

pale brown, body broadly ovate, 3.2–4 × 2–2.6 mm, base rounded or cordate, apex abruptly contracted to beak;

beak 1.3–1.5 mm, 1/3 length of perigynium.

green, usually red dotted, 2-ribbed and finely 8–12-veined, veins more obvious near base, ellipsoid to oblong-ovoid, loosely enveloping achenes, 2–3.7 × 1.3–1.6 mm, membranous, acute at base, tapering gradually to acute beakless apex, glabrous.

brown, ovate, 1.5–1.9 × 1.2–1.6 mm, dull.

substipitate, 1.2–2.6 × 1–1.2 mm.

hyaline, pale brown, becoming colorless with green midrib, awn usually not longer than the body.

spikes 2–5, 1 per node, well separated, drooping at maturity, pistillate with 10–45 perigynia attached 2 mm apart, linear, 10–70 × 2–3.5 mm.

spike gynecandrous, 10–60 × 1–3 mm.

scales white-hyaline tinged with chestnut, broad green midrib often red dotted, sometimes scabrous, ovate to oblong, shorter than mature perigynia, apex rounded or cuspidate with ciliate awn less than 1 mm, otherwise glabrous.

= 50, 52, 54.