Flora of North America species comparison

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.

20–90 cm;

vegetative culms inconspicuous with few leaves clustered at apex.

green, widest blades 2.1–4 mm wide.

sheaths white-hyaline or green-veined, sometimes papillose, summits U-shaped, not distally expanded;

distal ligules 2.2–6 mm;

blades 3–4 per fertile culm, 11–25 cm × 1.7–4.2 mm.

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.

mostly dense, brown, 1.1–3 cm × 5–14 mm;

proximal internode 1–4 mm; 2d internode 1.4–3.4 mm;

proximal bracts scalelike, with bristle tips shorter than inflorescences.

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.

3–10, usually overlapping, ovoid to globose, 4–10 × 3–7 mm, base rounded or truncate, apex rounded.

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.

ascending to ascending-spreading, light to dark reddish brown, conspicuously 3+-veined abaxially, faintly or basally 1–3-veined adaxially, winged to base, ovate or elliptic, plano-convex, 2.5–3.8 × (1–)1.2–2 mm, 0.35–0.45 mm thick, 1.9–2.5 times as long as wide, margin flat, including wing 0.2–0.5 mm wide, 1b ciliate-serrulate at least distally;

beak reddish brown at tip, flat, ± ciliate-serrulate, abaxial suture with reddish brown-hyaline margin, distance from beak tip to achene 1.2–2.2 mm.

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.

ovate or elliptic, 1–1.3 × 0.6–0.9 mm, 0.3–0.4 mm thick.

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

scales reddish brown, usually with green or whitish to brown midstripe, lanceolate, 2.5–3.5 mm, shorter and narrower than perigynia, apex acuminate or acute.

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

= 68, 70.