Flora of North America species comparison

to 90 cm × 2 mm, scabrous.

trigonous in cross section, 25–100 cm, smooth or somewhat scabrous-angled distally.

sheath fronts spotted red-brown, veinless, plane, apex truncate to convex, membranous;

ligule rounded, to 1 mm, free limb to 0.2 mm;

blades to 75 cm × 6 mm, shorter than flowering stem.

basal sheaths brown or lightly tinged with pinkish red, spongy-thickened;

ligules as long as wide;

blades pale to mid green, flat to broadly V-shaped, widest leaves 4.5–12(–15) mm wide, glabrous.

loosely paniculate, 4–12 cm × 15–20 mm, with 10–20 branches proximal branches distinct; the proximal internode to 25 mm;

bracts scalelike, not conspicuous, the awn, when present, 15–50 mm.

10–40(–50) cm;

proximal bract 12–55(–75) cm, exceeding but not more than 2.5 times longer than inflorescence;

proximal 2–5 spikes pistillate, erect or the proximal ascending, ca. 20–150-flowered, cylindric;

terminal 2–5 spikes staminate, well elevated beyond summit of separate pistillate spikes.

dark brown-black, 3–5-veined abaxially, 0–3-veined adaxially, body ovate to lanceolate, 3–4.5 × 1.5–2 mm, base rounded to cordate, conspicuous basal spongy tissue somewhat distending perigynium;

beak 1–1.5 mm.

spreading, often green or straw colored, 9–15-veined, veins running into beak, ovate, (3.2–)4–8.6 × 1.7–3 mm, apex contracted;

beak (1–)1.2–2.7 mm, bidentulate, smooth, teeth straight, 0.2–1.3 mm.

red-brown, ovate, 1.2–1.5 × 1–1.2 mm, glossy;

style base cylindric.

brown, symmetric, not indented, trigonous, smooth.

hyaline, red-brown or pale brown, margins colorless, broad, shining, apex acute or mucronate.

with prominent apiculus to 0.5 mm.

scales lanceolate ovate, 2.6–5.5(–7.6) × 0.8–1.7(–2.1) mm, mostly shorter than perigynia, margins entire, apex acute to acuminate, awnless (rarely acuminate-awned).

3.