Flora of North America species comparison

20–90 cm;

vegetative culms inconspicuous with few leaves clustered at apex.

to 80 cm × 3.5 mm, scabrous abaxially.

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 all with blades, fronts rugose, red-brown spotted, veinless, apex hyaline, colorless, fragile, convex, entire;

ligules rounded, 7 mm, free limb to 0.5 mm;

blades not epistomic, to 75 cm × 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.

densely spicate, cylindric, elongate, with 8–12 branches, 3–7 × 2 cm;

proximal internode to 15 mm.

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

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.

green with green veins, 3–5-veined abaxially, veinless adaxially, to 4.5 × 2 mm, base spongy on both sides, not distended proximally, rounded;

stipe to 0.3 mm;

beak to 1.8 mm, serrulate.

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

ovate, 2.2 × 1.4 mm;

stalk to 0.2 mm;

persistent style base cylindric.

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.

hyaline.

= 68, 70.