Flora of North America species comparison

to 100 cm × 2 mm, scabrous.

30–100 cm.

sheath fronts spotted red-brown or pale brown, apex truncate or short-convex, membranous or hyaline, rugose;

ligule retuse or rounded, to 2 mm, free limb to 0.2 mm;

blades 120 cm × 5 mm, longer than flowering stem.

sheaths papillose, summits U-shaped;

distal ligules 2.1–4.6 mm;

blades 3–4 per fertile culm, 18–23 cm × 2–4 mm.

spicate, (3–)7–10 cm × 15 mm, with 10–15 branches, the proximal branches distinctly separate; the proximal internode to 25 mm;

bracts setaceous, those subtending at least the proximal lateral branches conspicuous.

stiffly erect, open, coppery brown, 1.5–3.4 cm × 6–15 mm;

proximal internode (1–)3–6(–9) mm; 2d internode 1–4 mm;

proximal bracts usually scalelike, occasionally bristlelike.

(3–)5–6(–10), distant, individually distinct, rhomboid-ovoid, 5–10 × 3–7 mm, base and apex tapered.

green to pale brown, veinless on both faces or 3-veined abaxially, body ovate or elliptic, 2–3.2 × 1.3–1.8 mm, base obtuse;

beak 0.8–1.2 mm, 1/3–1/2 length of perigynium.

ascending, light green to straw colored, pearlescent, often with adaxial reddish brown blotch, conspicuously 7–15-veined abaxially, usually inconspicuously or conspicuously (6–) 9–12-veined adaxially, lanceolate, plano-convex, 2.9–4.3 × 0.9–1.4 mm, 0.6 mm thick, margin flat, including wing 0.07–0.4 mm wide, unwinged below median;

beak brown, white-hyaline at tip, flat, ciliate-serrulate, abaxial suture conspicuous, often with narrow white-hyaline margin, distance from beak tip to achene 1.5–2.4 mm.

red-brown, ovate, 1.2–1.4 × 1 mm, glossy.

ovate, 1.3–1.6 × 0.7-1.4 mm, 0.3–0.5 mm thick.

pale brown, hyaline, awn to 3 mm.

scales mid to dark brown, usually with pale midstripe, glossy, lanceolate, (3–)3.5–3.7(–4) mm, subequal to perigynia in length and width, margin white-hyaline, to 0.15 mm wide, apex acute.

= 52.

= 74.