Flora of North America species comparison

3–7.5(–18) cm, scabrous distally;

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

20–90 cm;

vegetative culms inconspicuous with few leaves clustered at apex.

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

sheaths white-hyaline or green-veined, sometimes papillose, summits U-shaped, not distally expanded;

distal ligules 2.2–6 mm;

blades 3–4 per fertile culm, 11–25 cm × 1.7–4.2 mm.

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.

mostly dense, brown, 1.1–3 cm × 5–14 mm;

proximal internode 1–4 mm; 2d internode 1.4–3.4 mm;

proximal bracts scalelike, with bristle tips shorter than inflorescences.

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.

3–10, usually overlapping, ovoid to globose, 4–10 × 3–7 mm, base rounded or truncate, apex rounded.

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.

ascending to ascending-spreading, light to dark reddish brown, conspicuously 3+-veined abaxially, faintly or basally 1–3-veined adaxially, winged to base, ovate or elliptic, plano-convex, 2.5–3.8 × (1–)1.2–2 mm, 0.35–0.45 mm thick, 1.9–2.5 times as long as wide, margin flat, including wing 0.2–0.5 mm wide, 1b ciliate-serrulate at least distally;

beak reddish brown at tip, flat, ± ciliate-serrulate, abaxial suture with reddish brown-hyaline margin, distance from beak tip to achene 1.2–2.2 mm.

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

ovate or elliptic, 1–1.3 × 0.6–0.9 mm, 0.3–0.4 mm thick.

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.

scales reddish brown, usually with green or whitish to brown midstripe, lanceolate, 2.5–3.5 mm, shorter and narrower than perigynia, apex acuminate or acute.

= 30, 32.

= 68, 70.