Flora of North America species comparison

(20–)30–100 cm, 1.5–3.5 mm wide basally, 0.7–1.2 mm wide distally.

densely tufted, central, ascending or lax, 24–82 cm × 0.8–1.6 mm.

sheaths usually loose, proximal green-and-white-striped and green-and-white-mottled, with conspicous transverse veins on back, fronts white to hyaline, sometimes red dotted and transversely rugose, yellow or brown and thickened at mouth;

ligules 1–4.5 mm, shorter than to as long as wide;

widest leaf blades 3.5–5 mm wide.

basal sheaths light brown to brown;

sheaths green or yellow-green, 2–26 mm;

blades ascending, green or yellow-green, midrib well developed abaxially, 2 lateral veins well developed adaxially, flat, 18–44 cm × 12–14 mm, blade of overwintering leaves smooth abaxially.

with 5–10 spikes, (1.5–)2–5 cm × 8–13 mm;

proximal internodes shorter than to as long as proximal spikes;

proximal bracts to 3 cm;

spikes with 5–15 ascending to spreading perigynia.

peduncles of proximal spikes 0–12 cm, arising in proximal 1/3 of culm, distal lateral spikes not exerted;

peduncles of terminal spike 0–2.8 cm;

bracts 8–21 × 0.5–4 mm, blade of distal lateral spike linear, narrower than spikes;

widest bract blade of distalmost lateral spike 0.5–3.4 mm wide.

3(–4) per culm;

lateral spikes 6–9(–15) × 4–6 mm, distal ones separate;

terminal spike 11–35 × 1.8–3 mm, exceeding distal lateral spike.

pale green to pale brown, veinless or weakly 2–5-veined abaxially, 3.4–4.6 × 1.9–2.8 mm, body somewhat spongy, thickened at base, margins serrulate distally;

beak 0.7–1.4 mm, apical teeth 0.3–1 mm.

4–20 per spike, closely to loosely overlapping, ratio of longer lateral spike length to perigynia number 0.8–3.4, aggregated, spreading, finely, conspicuously (22–)25–32-veined, narrowly elongate ovate, 3.5–5.5 × 1.2–1.6 mm, 1.9–2.3 times as long as achene bodies;

beak excurved, 0.5–1.7 mm.

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

elongate-obovoid, 2.2–3.2 × 1–1.4 mm.

scales hyaline or pale brown with green, 1–3-veined center, ovate, 2.2–3.5 × 1.2–1.8 mm, body 2/3 as long to almost length of perigynia, apex acuminate to short-awned.

scales 2–2.5 × 0.8–1.2 mm, apex acute.

1.5–2.5 mm.

3.8–4 mm.

scales 3.2–4.2 × 1–1.2 mm, margins hyaline or brown tinged, apex acute.

= 48.