Flora of North America species comparison

20–50 cm.

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

sheaths adaxially white-hyaline, often cross-corrugated, summits U-shaped or rounded, sometimes prolonged to 2.5 mm beyond collar;

distal ligules 1–2.5(–3.5) mm;

blades 2–4(–7) per fertile culm, 8–25 cm × (2.5–)3–4 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.

dense, gold or brown, 1.3–3 cm × 12–20 mm;

proximal internode 0.5–3.9(–5) mm; 2d internode 1–3(–4) mm;

proximal bracts scalelike or bristlelike, shorter than inflorescences.

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.

3–8, usually distinct, broadly ovoid, 9–12 × 6–9 mm, base rounded to attenuate, apex rounded.

ascending to spreading, green, straw colored, or occasionally white, 10–20-veined abaxially, conspicuously 0–12-veined adaxially, thin, broadly ovate, flat except over achene, 4–5.8 × 1.8–3.4 mm, 0.3–0.5(–0.6) mm thick, 1.7–2.3 times as long as wide, margin flat, including wing 0.4–1 mm wide, edge minutely crinkled and ciliate-serrulate at least distally;

beak spreading, gold, red-brown to dark brown, sometimes white-hyaline at tip, flat, ± ciliate-serrulate, sometimes cylindric, unwinged, ± entire for 0.5–0.7 mm, abaxial suture usually inconspicuous, distance from beak tip to achene 2.2–3 mm.

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.

elliptic to broadly obovate, (1.4–)1.7–2.4 × 1–1.6 mm, 0.3–0.5 mm thick.

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

scales white, gold, red-brown, or coppery, with pale to green midstripe, lanceolate to ovate, 3.2–4.8 mm, shorter and narrower than perigynia, margin white, 0–0.15(–0.3) mm wide, apex acute to acuminate.

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.

1.5–2.5 mm.