Flora of North America species comparison

20–90 cm;

vegetative culms inconspicuous with few leaves clustered at apex.

to 80 cm.

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.

blades 1.5–3(–4) mm wide.

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.

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.

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

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, 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.

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.

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

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 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.

= 68, 70.