Flora of North America species comparison

often lax, supported by other vegetation, 27–105 cm.

to 90 cm.

sheaths white-hyaline or green-veined with central white-hyaline strip, summits U-shaped to rounded, sometimes prolonged beyond collar;

distal ligules 1.5–5.5 mm;

blades 3–6 per fertile culm, 12–65 cm × 1.3–3.7(–4.6) mm.

dense to open, green and brown, gold and brown, or brown, 1.3–3.5 cm × 7–23 mm;

proximal internode 2–3(–4.5) mm; 2d internode 1–3 mm;

proximal bracts bristlelike or rarely leaflike, longer than inflorescences.

with 3–7 spikes;

peduncles of proximal spikes exserted (0.5–)1 cm;

proximal bracts with blades 12–80 mm, sheaths cylindric, 12–58 mm, mouth not purple-banded, 0.6–2 mm wide.

4–11, densely aggregated, at least proximal 1–3 distinct, ovoid to broadly ovoid, 6–12.3 × 3.8–9.1 mm;

base rounded;

apex acute to rounded.

ascending to spreading, straw colored or gold to coppery, conspicuously (0–)5–9-veined abaxially, conspicuously 0–6-veined adaxially, veins not reaching top of achene, ovate to broadly ovate, plano-convex to biconvex, (2.9–)3.5–4.7(–5.7) × 1.2–1.7(–2.2) mm, 0.5–0.75 mm thick, ± leathery, margin flat, including wing 0.2–0.4 mm wide, ciliate-serrulate at least on distal body, with metallic sheen;

beak often brown to dark brown at tip or white-hyaline, cylindric, unwinged, abaxial suture inconspicuous, distance from beak tip to achene 1.5–2.2(–2.6) mm, ± entire for (0.3–) 0.4–0.8 mm.

ascending to spreading, green to purple, indistinctly or distinctly 9-20-veined, (3–)3.5–5.5 × 0.9–1.6(–1.8) mm, usually without flat margins around achene, usually glabrous, margins often ciliate-setose distally;

beak 0.5–1.5 mm, tip dark purple, often ciliate-setose, distance from perigynium beak tip to achene apex less than 2.5 mm.

broadly ovate to quadrate, 1.3–2.1 × 1–1.5(–1.7) mm, 0.5–0.6 mm thick.

± obovoid, 1.3–2 × 0.7–1.1 mm.

scales brown, red-brown, or coppery, with whitish, green, or pale brown midstripe, ovate, (3.2–)3.5–4.5 mm, shorter, narrower than, or covering perigynia, margin often indistinct, white, 0–0.4 mm wide, apex ± obtuse or rarely short-awned.

scales red-brown to dark purple with paler midvein, ovate to obovate, 1.9–3.5 × 1–1.7 mm, apex acute or obtuse.

spikes pistillate or androgynous, erect to pendent, purple or purple and brown, 12–32 × 5–10 mm;.

spike staminate, ± erect, 11–66 × 3–8 mm.

scales gold to purple brown with pale, 2.9–4.5 × 0.7–1.6 mm, midvein ciliate, margins scarious, apex obtuse.

(1.9–)2–3 mm.