Flora of North America species comparison

(24–)35–85 cm.

to 80 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.

blades 1.5–3(–4) mm wide.

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.

usually less than 15 cm, proximal internodes usually less than 100 mm;

peduncles of lateral spikes usually included or exserted less than 1 cm;

proximal bracts with blade 8–75 mm, sheath cylindric, 6–25 mm, mouth not purple-banded, U-shaped, 0.7–1.3(–1.5) mm wide.

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

4–6;

lateral spikes pistillate androgynous, erect or, sometimes, proximal spikes pendent on long-exserted peduncles, 10–15(–20) × (3–)4.5–7(–8) mm;

terminal spike usually staminate, ± erect, 10–16 × (2.5–)3–5 mm.

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.

spreading, usually green or with a few purple blotches, occasionally all purple, 10–16-veined, obovate to ovate, 2.7–3.5(–4) × 1–1.7 mm, margins usually ciliate distally, glabrous;

beak distinct, 0.7–1.2 mm, tip usually brown or purple, usually ciliate, distance from beak tip to achene apex less than 1.4 mm.

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

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 usually at least partly gold or red-brown with broad scarious margins and tip, sometimes all white, obovate to ovate, 1.8–3 × 1.1–1.8 mm, apex usually obtuse, sometimes short-awned.

scales gold or reddish brown with pale midvein and scarious margins, sometimes all white, obovate to elliptic, rarely ovate, (2.6–)3–3.7(–4.0) × 0.9–2 mm, apex obtuse.

1.4–2.5(–2.7) mm.

= 62, 64, 66, 68.