Flora of North America species comparison

(24–)35–85 cm.

to 90 cm.

sheath adaxially white-hyaline, summits U-shaped to rounded;

distal ligules 2–3 mm;

blades (1–)2–4(–5) per fertile culm, flat ± to tip, 7–22 cm × (1.5–)2–3.5(–4) mm.

stiffly erect, usually open, brown, 1.5–4 cm × 10–15 mm;

proximal internode (2.5–)4–10 mm; 2d internode (2.5–)3–6 mm;

proximal bracts scalelike or bristlelike, shorter 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.

5–9, usually loosely aggregated, ovoid to broadly ovoid, 9–14 × 6–8 mm, base attenuate, apex rounded to tapered.

ascending to ascending-spreading, gold to light brown, conspicuously 3–9-veined abaxially, conspicuously 2–5-veined adaxially, lanceolate to ovate, usually flat except over achene, 3.4–4.7(–5.2) × 1.3–2.1 mm, 0.4–0.5 mm thick, margin flat, including wing 0.2–0.6 mm wide;

beak red-brown or gold at tip, usually cylindric, unwinged, ± entire for 0.3–0.5 mm, sometimes flat, ciliate-serrulate to tip, abaxial suture often with conspicuous white margin, distance from beak tip to achene (1.2–)1.5–2 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.

elliptic to broadly ovate, 1.1–1.8 × 0.9–1.2 mm, 0.4–0.5 mm thick.

± obovoid, 1.3–2 × 0.7–1.1 mm.

scales reddish gold to brown or greenish, often white-hyaline at tip or base, with pale or green midstripe, narrowly to broadly ovate, 3.4–5 mm, length and width less or greater than perigynia, margin not white-hyaline, apex acute to acuminate.

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.

= 62, 64, 66, 68.