Flora of North America species comparison

coarse, 1.8–3 mm thick, typically with long, unbranched segments from which shoots arise singly every few nodes.

sharply trigonous, (10–)25–80(–100) cm, scabrous-angled distally.

4–16 cm, scabrous distally;

bases (remnants of old leaves) fibrous.

basal sheaths dark brown to nearly black;

sheaths with hyaline inner band, apex not prolonged, glabrous;

ligules 0.6–2.6 mm;

blades 1–3(–3.5) mm wide.

blades pale to bright green, equaling or exceeding stems, 0.5–4.3 mm wide, herbaceous or coriaceous, glabrous abaxially, strongly scabrous to papillose adaxially.

elongate, 0.9–4 cm;

spikes 5–18(–25), usually unisexual; staminate spikes lanceoloid; pistillate spikes ovoid.

with both staminate and pistillate scales;

peduncles of basal pistillate spikes erect, short to elongate, stout to slender;

peduncles of staminate spikes 0.8–15 mm;

proximal nonbasal bracts scalelike, shorter than inflorescences.

proximal pistillate spikes 2–3 (basal spikes 1–2);

cauline spikes usually overlapping with staminate spikes, with 3–10(–15) perigynia; staminate spikes 4.5–11.3 × 1.1–3 mm.

brown to nearly black at maturity, essentially veinless, usually stipitate, ovate, plano-convex, (2.2–)2.6–3.7 × 1.2–1.9 mm, dull;

beak 0.7–1.2 mm, 1/4–1/2 length of body, apex ± hyaline, obscurely bidentate.

green to pale brown, veinless, ellipsoid, obtusely trigonous in cross section, 3.1–4.7 × 1.1–1.6 mm;

beak straight, pale green, occasionally with reddish brown tinge near apex, strongly 2-edged, 0.9–2 mm, smooth or ciliate-serrulate, apical teeth 0.2–0.5 mm.

brown, ellipsoid to obovoid, obtusely trigonous in cross section, 1.6–2 × 1.2–1.6 mm.

scales straw colored to pale reddish brown, with hyaline margins, ovate, apex acute to acuminate-awned, dull to ± satiny.

(1.8–)2.2–3.9 mm, apiculus bristly hairy (30X).

1.6–2.9 mm.

pistillate scales pale brown to reddish brown, with narrow white margins, ovate, 2.9–4.1 × 1.5–1.9 mm, equaling or exceeding perigynia, apex acute to long-acuminate; staminate scales ovate, 4.2–5.4 × 1.2–2.1 mm, apex obtuse or acute to acuminate.

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