Flora of North America species comparison

(24–)35–85 cm.

33–72 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.

sheath adaxially white-hyaline or brownish tinged, occasionally only in very narrow band extending 2.5 cm proximal to collar;

summit usually U-shaped;

distal ligules 1–2.5(–3.5) mm;

blades 3–4(–5) per fertile culm, 15–30 cm × (2.8–)3–4.5 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, green and brown, gold and brown, or light brown, (1.7–)2–3 cm × 15–21(–27) mm;

proximal internode (2–)3.5–7(–11) mm; 2d internode 2–5 mm;

proximal bracts bristlelike, shorter than inflorescences or occasionally leaflike.

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

4–5, distant, distinct, broadly ovoid, 11–16 × 6–12 mm, base rounded to attenuate, apex acute to truncate.

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 or appressed-ascending, green to gold, veinless on each face or, occasionally, 6-veined abaxially, broadly ovate, usually flat except over achene, (5.5–)6–7.2 × 2.7–3.8 mm, 0.5–0.7 mm thick, 1.8–2.3 times as long as wide, margin flat, including wing 0.5–1.1 mm wide, ciliate-serrulate at least distally;

beak red-gold to red-brown, sometimes white-hyaline at tip, flat, ± ciliate-serrulate, abaxial suture with conspicuous white margin, distance from beak tip to achene 3–4.3 mm.

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

broadly ovate to broadly elliptic, (1.8–)2–2.3 × (1.1–)1.3–1.6 mm, (0.4–)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 gold, red-brown, or chestnut-brown, sometimes with green to gold midstripe, lanceolate to broadly ovate, 4.7–6.7 mm, shorter and narrower than perigynia, margin white 0.1–0.2(–0.4) mm wide, apex acute to acuminate.

= 62, 64, 66, 68.