Flora of North America species comparison

20–90 cm;

vegetative culms inconspicuous with few leaves clustered at apex.

acutely angled, 10–50 cm, scabrous.

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.

sheaths of proximal leaves glabrous, fronts lacking spots and veins, apex concave;

blades 1.5–4 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.

proximal bract setaceous or foliaceous, shorter than inflorescence, 0.5–3 mm wide.

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

erect;

proximal (1–)2–3 spikes pistillate, 0.7–3 cm × 3–4 mm, base cuneate or attenuate;

terminal 1(–2) spikes staminate.

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, green, spotted purple-black or mottled on apical 1/2, veinless, somewhat flattened, tightly enclosing the achenes, ellipsoid, 1.5–3.5 × 0.9–2 mm, dull, apex rounded or acute, papillose;

stipe to 0.45 mm;

beak 0–0.2(–1) mm.

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

not constricted, dull.

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 black, equaling or shorter than perigynia, apex obtuse or acute, awnless.

= 68, 70.