Flora of North America species comparison

(20–)30–100 cm, 2.5–8 mm wide basally, 0.7–1.6 mm wide distally.

to 80 cm × 2 mm, scabrous throughout.

sheaths usually loose, proximally green-and-white-striped, not white spotted, with conspicuous transverse veins on back, fronts hyaline, sometimes transversely rugose and red dotted, thin, white or hyaline and fragile at mouth;

ligules 2–7 mm, shorter to longer than wide;

widest leaf blades (3–)4–8 mm wide.

sheaths all with blades, fronts smooth, lacking spots, veinless, apex yellow, thickened, truncate, cartilaginous, entire;

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

blades yellow-green, epistomic, to 60 cm × 6 mm, papillose adaxially (25X).

with 5–15 spikes, 1–5 cm × 8–15 mm, occasionally compound, then somewhat larger;

proximal bracts to 3 cm;

spikes with 5–15 ascending to spreading perigynia;

proximal internodes shorter than to 1.5 times as long as proximal spikes.

densely spicate, cylindric, elongate, with 6–15 distinguishable branches, 3–6 × 1.5 cm;

proximal internode to 10 mm;

proximal bracts setaceous, apparent.

pale green to pale brown, veinless or 3–7(–12)-veined abaxially, rarely veined adaxially, 3.5–5.5 × 2–3 mm, body somewhat spongy, base thickened, margins serrulate distally;

beak 0.6–1.6 mm, apical teeth 0.3–1 mm.

pale brown, red-brown distally, with red-brown veins, 10–12-veined abaxially, 7-veined adaxially, to 6 × 2.6 mm, base slightly distended proximally, cordate;

stipe to 0.2 mm;

beak to 2.5 mm, margins serrulate.

circular to elliptic- circular, 1.8–2.1 × 1.6–2 mm.

ovate, 2 × 1.3 mm;

stalk to 0.3 mm;

persistent style base cylindric, 0.3 mm.

scales hyaline or brown with green, 1–3-veined center, ovate, 2.6–4.4 × 1.3–2.4 mm, body shorter to slightly longer than perigynium, apex acuminate to short-awned.

1.5–3 mm.

hyaline.

= 46.