Flora of North America species comparison

35–100 cm.

to 80 cm × 4 mm, scabrous.

sheaths adaxially green-veined nearly to collar, narrow hyaline band or sharp Y-shaped region at collar, adaxially firm, summits U-shaped;

distal ligules 1.5–4.5 mm;

blades 3–4 per fertile culm, 15–30 cm × 1.5–3 mm.

sheaths all with blades, fronts smooth, red spotted, indistinctly linearly veined, apex hyaline, colorless, fragile, convex, entire;

ligules rounded, 5 mm, free limb to 0.5 mm;

blades dark green, not epistomic, to 60 cm × 7 mm.

nodding, open, yellow-brown to reddish brown, 3.5–8 cm × 5–14 mm;

proximal internode 5–18 mm; 2d internode 5–17 mm;

proximal bracts scalelike with bristle tips shorter than inflorescences.

densely spicate, elongated, cylindric, with 8–12 branches, 2–4 × 1.5 cm;

proximal internode to 0.5 mm;

proximal bracts setaceous, apparent.

3–7, distant, distinct, globose, (6–)9–14 × 6–9 mm, base usually attenuate, apex rounded;

lateral spikes with staminate portion 2–6 mm at base.

widely spreading, reddish brown, conspicuously 5-veined or more on each face, ± orbiculate, flat except over achene, 4–5.6 × 1.8–2.8 mm, 0.4–0.5 mm thick, base rounded, margin flat, including wing 0.6–0.9 mm wide;

beak widely spreading, pale to reddish brown at tip, flat, ciliate-serrulate, abaxial suture with golden brown margin, distance from beak tip to achene 2–3 mm.

pale brown, coppery distally, faintly 3–5-veined or veinless abaxially, veinless adaxially, to 4 × 1.7 mm, base not distended proximally, rounded;

stipe to 0.2 mm;

beak to 2 mm, serrulate.

elliptic, 1.5–1.8 × 0.8–1 mm, 0.3–0.4 mm thick.

circular, 1.5 × 1.3 mm;

stalk to 0.15 mm;

persistent style base cylindric.

scales reddish brown, with green or pale midstripe, lanceolate, 2.5–3 mm, shorter or longer and narrower than perigynia, margin reddish brown, apex firm, acuminate or awned to 0.8 mm.

scales with reddish brown margins.

coppery with hyaline margins.

= 74.

= 68.