Flora of North America species comparison

25–60(–85) cm;

vegetative culms with few leaves clustered at apex.

purple-red to 4.8–8.1 cm at base, 24–53 cm;

vegetative shoots 28–49 cm, 0.5–1.3 times as tall as culms.

sheaths adaxially white-hyaline, summits U-shaped;

distal ligules 1.5–6 mm;

blades (2–)3–4(–5) per fertile culm, 7–22 cm × 2–4 mm.

green, widest blades 2.1–4 mm wide.

erect, usually dense, green, gold, or dark brown, 1.8–3 cm8–14 mm;

proximal internode 2–3(–5) mm; 2d internode 1–3 mm;

proximal bracts bristlelike, shorter than or equaling inflorescences.

13–38 cm, 0.77–0.96 of culm height;

internode between proximalmost scales in proximalmost spike 1.7–2.9 mm;

internode between distal lateral spikes (1.6–)3.4–15.2 cm, longest internode between distal lateral spikes (5.3–)8.8–15.2 cm;

longest peduncle per plant of terminal lateral spikes (2.2–)5.1–10.4 cm;

proximal bract sheaths tight, hyaline band of sheath front with apex usually truncate or concave, occasionally convex, elongated to 2.2(–5) mm beyond apex;

ligules 4–4.9(–9.6) mm;

blades uniformly green, bract blade of distalmost lateral spike slightly exceeding or exceeded by terminal spike, longest bract blade of distalmost lateral spike 3.9–11 cm.

6–14, distant, distinct, ovoid to broadly ovoid, 8–10 × 4.5–6.5 mm, base and apex acute to truncate.

4–5, usually separate or the distal 2(–3) overlapping;

lateral spikes pistillate, with 3–12 perigynia, longest per plant with 6–12, 5–21 × 3.2–4.1 mm, ratio of longest lateral spike (in mm) to flower number = 1.8–2.1;

terminal spike 16–32 × 1.9–2.5 mm, longest per plant 17–36 mm, exceeding distalmost lateral spike.

ascending, white to gold or light brown, 0–5-veined abaxially, 0–4-veined adaxially, narrowly lanceolate to narrowly ovate, flat except over achene or, occasionally, plano-convex, 3.4–4.1(–4.7) × 0.9–1.3 mm, 0.15–0.35 mm thick, margin flat, including wing 0.1–0.2 mm wide, usually crinkled distally;

beak brown or red-brown at tip, flat, ± ciliate-serrulate, abaxial suture inconspicuous, distance from beak tip to achene (1.8–)2.1–3 mm.

distichously imbricate, prominently 53–64-veined, narrowly obovate or narrowly oblong in outline, 3.8–4.9 × 1.4–1.7 mm, (2.4–) 2.5–3.1 times as long as wide, 1.7–2 times as long as achene bodies, base gradually tapered, apex gradually tapered;

beak absent or straight, 0–0.4 mm, 0–11% of perigynium length.

± elliptic, 1.1–1.5 × 0.6–0.8 mm, 0.15–0.35 mm thick;

style usually persistent, sinuate.

2.6–3.5 × 1.3–1.6 mm, tightly enveloped by perigynia, base abruptly contracted, apex abruptly contracted;

stipe 0.2–0.6 mm;

body 2.1–2.7 mm;

beak straight, 0.1–0.4(–1.5) mm.

scales gold to dark brown, with whitish, green, or brown midstripe, lanceolate, 3–3.8 mm, shorter and narrower than perigynia, apex acuminate to short-awned.

scales 3–4.6 × 1.6–2 mm, body 1.6–2.6 mm, midrib prolonged as awn 1.1–2.5 mm.

scales 4.3–5 × 1.4–1.8 mm, apex usually acute, occasionally obtuse, awnless.

= 52, ca. 66, 70.