Flora of North America species comparison

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.

25–80 cm.

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.

sheaths adaxially hyaline, often green-veined nearly to collar, summits U- or V-shaped or rounded, sometimes prolonged to 1.5 mm beyond collar;

distal ligules 1–4 mm;

blades 2–5 per fertile culm, 7–25 cm × 2–3.5 mm.

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.

stiffly erect, dense or open, greenish brown to gold, 2–4.5 cm × 12–20 mm;

proximal internode 2–15 mm; 2d internode 2.5–5 mm;

proximal bracts leaflike, much longer than inflorescence, or bristlelike.

5–8(–11), usually distinct, broadly ovoid, 8–11 × 5–8 mm, base and apex acute to rounded.

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.

ascending to spreading, green, gold, or cream colored, conspicuously 7–11-veined abaxially, conspicuously 0(–2)-veined adaxially, ovate to broadly ovate, plano-convex to biconvex, 4–5 × 1.9–2.5 mm, 0.7–1.1 mm thick, margin flat, including wing 0.2–0.6 mm wide, often thickened;

beak gold at tip, flat, ciliate-serrulate, abaxial suture usually inconspicuous, distance from beak tip to achene 1.7–2 mm.

substipitate, 1.2–2.6 × 1–1.2 mm.

obovate to elliptic, 2.1–2.5 × 1.6–2 mm, 0.7–1 mm thick.

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.

scales reddish brown, with paler center, ovate to broadly ovate, 4–5.5 mm, equaling, ± covering perigynia, hyaline margin absent or to 0.2 mm, apex acute to mucronate.

= 50, 52, 54.

= 78.