Flora of North America species comparison

20–90 cm;

vegetative culms inconspicuous with few leaves clustered at apex.

solitary or not, erect, (15–)30–80(–140) 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.

6–12;

basal sheaths purplish red;

sheath of distal leaf 0–1(–2.5) cm;

ligules rounded, 1–8 mm;

blades 8–27 cm × 3.5–8 mm.

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.

2–15 cm;

peduncles of proximal pistillate spikes 0.3–1.5 cm, basal 2 peduncles 0.2–2.1 cm apart; of terminal spike 0.5–4 cm;

bracts leafy, sheathless, blades 6–21 × 2–6 mm.

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

proximal pistillate spikes 1–4, often closely aggregated and difficult to distinguish, 1–12-flowered, ovoid to obovoid, 1–2.7 × 1–2.8 cm;

terminal staminate spike 1, 1–5 cm × 1–3 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.

ascending to spreading or the basalmost reflexed, strongly 13–23-veined, lanceoloid to ovoid, 10–16.5 × 2.5–6.5 mm, with satiny luster, glabrous;

beak poorly defined, 2–4.2 mm.

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

sessile, ellipsoid to obovoid, flat to convex faces, angles not thickened, 3.5–5.7 × (2.2–)2.5–3.9 mm;

style same texture as achene.

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 1–3-veined, lanceolate-ovate to ovate, 4–9.5 × 2–3.8 mm, apex acute to awned, awns rough, to 6.5 mm.

3, 2–4 mm.

= 68, 70.