Flora of North America species comparison

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

30–75 cm.

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.

sheaths adaxially often tinged brown, summits U-shaped;

distal ligules 0.5–2(–3) mm;

blades 4–6 per fertile culm, 17–45 cm × 2.5–4.5 mm.

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.

open or dense, greenish brown to gold, 2.5–4 cm × 9–20 mm;

proximal internode 4–16 mm; 2d internode 2–7.5 mm;

proximal bracts leaflike, longer than inflorescences.

3–8, distant, distinct, fusiform to broadly ovoid or obovoid, 11–21 × 6–9 mm, base acute to attenuate, apex truncate to tapered.

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.

appressed to ascending, green or gold, usually inconspicuously veined on each face, narrowly ovate to ovate, flat except over achene or ± plano-convex, 5.4–7.2(–7.5) × 2–2.8(–3) mm, 0.5–0.6(–0.7) mm thick, 2.4–2.7 times as long as wide, margin flat, including wing 0.45–0.8 mm wide, ciliate-serrulate at least distally;

beak red-gold to red-brown, sometimes white-hyaline at tip, flat, ± ciliate-serrulate, abaxial suture usually inconspicuous, distance from beak tip to achene 2.2–3.6 mm.

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

oblong to broadly ovate, 1.9–2.7 × 1.4–2 mm, 0.4–0.5 mm thick.

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 red-brown, red-gold, or gold, with pale brown or whitish midstripe, lanceolate to broadly ovate, 4.3–6.2 mm, shorter and narrower than perigynia, margin white, (0.1–)0.2–0.3(–0.5) mm wide, apex acute to acuminate.

1.5–2.5 mm.