Flora of North America species comparison

(24–)35–85 cm.

sometimes lax, (29–)50–135 cm.

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.

sheaths adaxially usually brown or gold tinged near summits, summits U-shaped, prolonged to 4 mm beyond collar;

distal ligules 2–7.5 mm;

blades 2–4 per fertile culm, 15–35 cm × (1.8–)2–5(–9.9) mm.

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.

dense, headlike, brown to gold, 1.1–4 cm × 7–20 mm;

proximal internode 1.5–2.5 mm; 2d internode 1–2.5 mm, these 2 internodes collectively less than 1/3 as long as inflorescences;

proximal bracts usually bristlelike, occasionally leaflike, much longer than inflorescences.

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

(4–)6–17, densely aggregated, usually individually indistinct, broadly ovoid to ovoid, 4.7–9(–12) × 3.7–7.6 mm, appearing coarse-textured, base rounded to acute, apex truncate to acute.

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.

ascending, green or straw colored to light or coppery brown, conspicuously 4–9-veined abaxially, conspicuous 0–4(–9)-veined adaxially, veins thin, reaching top of achene, ovate to broadly ovate, plano-convex or biconvex, (2.6–)3.3–4(–4.6) × (1.2–)1.4–1.6(–2) mm, 0.6–0.7 mm thick, 2.1–2.7 times as long as wide, margin flat, including wing 0.1–0.3(–0.4) mm wide, ciliate-serrulate on distal body, often with metallic sheen;

beak brown or gold at tip, cylindric, unwinged, abaxial suture inconspicuous, distance from beak tip to achene 1.2–1.8 mm, ± entire for (0–)0.3–0.7 mm.

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

usually ovate to broadly ovate, (1.3–)1.5–1.9 × (0.9–)1–1.2(–1.4) mm, 0.5–0.7 mm thick.

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.

scales pale green or straw colored to brown or reddish, often with green to straw colored midstripe, ovate to broadly ovate, 2.2–4.7 mm, shorter to slightly longer than perigynia, less than or equal in width, margin white, 0–0.2 mm wide, apex obtuse to awned.

= 62, 64, 66, 68.