Flora of North America species comparison

(24–)35–85 cm.

3–7.5(–18) cm, scabrous distally;

bases (remnants of old leaves) weakly to strongly fibrous.

sheath adaxially white-hyaline, summits U-shaped to rounded;

distal ligules 2–3 mm;

blades (1–)2–4(–5) per fertile culm, flat ± to tip, 7–22 cm × (1.5–)2–3.5(–4) mm.

blades pale green, greatly exceeding culms, 1–2.3(–3.8) mm wide, herbaceous, glabrous abaxially, strongly scabrous to papillose adaxially.

stiffly erect, usually open, brown, 1.5–4 cm × 10–15 mm;

proximal internode (2.5–)4–10 mm; 2d internode (2.5–)3–6 mm;

proximal bracts scalelike or bristlelike, shorter than inflorescences.

with both staminate and proximal spikes;

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

peduncle of staminate spikes 0.7–5.2(–12.3) mm;

proximal nonbasal bracts scalelike, usually shorter than (occasionally equaling) inflorescences.

5–9, usually loosely aggregated, ovoid to broadly ovoid, 9–14 × 6–8 mm, base attenuate, apex rounded to tapered.

proximal pistillate spikes 2–5 (basal spikes 1–3);

cauline spikes overlapping with staminate spikes, with (1–)4–12 perigynia; staminate spikes 4.6–13 × 0.7–2.2 mm.

ascending to ascending-spreading, gold to light brown, conspicuously 3–9-veined abaxially, conspicuously 2–5-veined adaxially, lanceolate to ovate, usually flat except over achene, 3.4–4.7(–5.2) × 1.3–2.1 mm, 0.4–0.5 mm thick, margin flat, including wing 0.2–0.6 mm wide;

beak red-brown or gold at tip, usually cylindric, unwinged, ± entire for 0.3–0.5 mm, sometimes flat, ciliate-serrulate to tip, abaxial suture often with conspicuous white margin, distance from beak tip to achene (1.2–)1.5–2 mm.

pale green to pale brown, veinless, obovoid to globose, rarely ellipsoid, obtusely trigonous in cross section, 2.2–3.2 × 1–1.4 mm;

beak straight, pale green to pale brown, strongly 2-edged, 0.4–1 mm, weakly ciliate-serrulate, apical teeth 0.1–0.2 mm.

elliptic to broadly ovate, 1.1–1.8 × 0.9–1.2 mm, 0.4–0.5 mm thick.

brown, ellipsoid, obtusely trigonous in cross section, 1.4–1.7 × 1–1.3 mm.

scales reddish gold to brown or greenish, often white-hyaline at tip or base, with pale or green midstripe, narrowly to broadly ovate, 3.4–5 mm, length and width less or greater than perigynia, margin not white-hyaline, apex acute to acuminate.

pistillate scales reddish brown with narrow white margins, ovate, 2.8–3.9 × 1.5–1.9 mm, equaling or exceeding perigynia, apex acute to acuminate; staminate scales ovate to lanceolate, 3.5–5.1 × 1.1–2.2 mm, apex obtuse to acute.

1.7–2.2 mm.

3.

= 62, 64, 66, 68.

= 30, 32.