Flora of North America species comparison

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

dark maroon at base; flowering stems 25–80 cm, much longer than leaves at maturity, 1–1.8 mm thick, glabrous but scabrous on angles, especially within inflorescence.

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.

basal sheaths maroon, bladeless, glabrous on back;

others grading from maroon to green on back, brown-hyaline and usually red dotted on front, glabrous or often pubescent near apex;

blades flat, 2.5–5.5 mm wide, usually less than 4 mm wide, glabrous or sparingly rough-hispidulous on 1 or both surfaces, margins scabrous, especially distally.

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.

peduncles of proximal spikes 0–65 mm and finely scabrous;

peduncle of terminal spike 0–12 mm, scabrous;

proximal bracts equaling or exceeding inflorescences;

sheaths 8–40 mm;

blades 1–4 mm wide.

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.

green to golden green, usually blotched or dotted with dark red, 2-ribbed and finely 12–15-veined, veins more obvious on abaxial side, loosely enveloping achene, oblong-lanceolate, 2.7–5 × 0.8–1.8 mm, membranous, base acute, apex tapering to beak, sparsely pubescent toward apex;

beak minutely bidentate, 0.3–1 mm, ciliate between apical teeth.

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

sessile, 1.6–2.5 × 0.9–1.5 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.

scales with green midrib and broad pale hyaline margins suffused with reddish or golden brown, broadly ovate, shorter than mature perigynia, apex acute to rounded, sometimes cuspidate, margins ciliate distally, otherwise glabrous.

1.5–3 mm.

spikes 3–5, 1 per node, well separated, erect or arching at maturity, pistillate with 20–45 perigynia attached 0.5–2 mm apart, rarely the distal staminate, linear to narrowly cylindric, 10–60 × 2.5–6 mm.

spike staminate, rarely with a few perigynia, sessile or pedunculate, 18–38 × 1.2–4 mm.

= 56, 58, 60.