Flora of North America species comparison

20–90 cm;

vegetative culms inconspicuous with few leaves clustered at apex.

often arching, weak, 10–40(–60) 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.

sheaths pale to mid brown abaxially, inner band thin and hyaline, concave at summit;

ligules as wide as long, 2–8 mm;

blades usually gray-green, flat to channeled, 5–15 cm × 1–2 mm, usually shorter than culms.

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.

erect, 1–2 cm × 5–12 mm;

proximal bracts usually scalelike, shorter than spikes.

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

2–4, closely approximate, individually distinct, proximal lateral spikes pistillate, containing 5–10(–15) perigynia, oblong-linear;

terminal spike gynecandrous, containing 10(–20) perigynia, clavate.

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, light to pale brown, often gray-brown at maturity, lightly or obscurely several-veined, from broadly elliptic-obovate to lanceolate, 1.5–3.5 × 1.–1.5 mm, widest near middle, subcoriaceous;

beak short, entire.

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

mid brown to red-brown, elliptic, 1.5 × 1–1.25 mm, dull to slightly glossy.

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 pale to red-brown with yellow-brown center and white-hyaline margins, oblong-ovate, subequal to perigynia, apex obtuse.

= 68, 70.

= 66.