Flora of North America species comparison

25–60(–85) cm;

vegetative culms with few leaves clustered at apex.

30–100 cm;

vegetative culms with numerous leaves spaced evenly along distal 1/2.

sheaths adaxially white-hyaline, summits U-shaped;

distal ligules 1.5–6 mm;

blades (2–)3–4(–5) per fertile culm, 7–22 cm × 2–4 mm.

sheaths adaxially green-veined nearly to collar, with V-shaped hyaline band extending 4–20 mm proximal to collar;

somewhat loose, expanded near summit, ± wing-angled, adaxially firm, summits truncate to U-shaped, prolonged beyond collar;

distal ligules 4–10 mm;

blades 4–6 per fertile culm, 13–40 cm × 3–7.5 mm.

erect, usually dense, green, gold, or dark brown, 1.8–3 cm8–14 mm;

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

proximal bracts bristlelike, shorter than or equaling inflorescences.

dense or proximally open, brown, 2–4(–4.5) cm × 8–15 mm;

proximal internode 2–6 mm; 2d internode 2–4 mm;

proximal bracts scalelike with bristle tip to 1(–8) cm.

6–14, distant, distinct, ovoid to broadly ovoid, 8–10 × 4.5–6.5 mm, base and apex acute to truncate.

6–15, usually widely spaced, globose, 4–8 × 4–8 mm, base rounded to tapered, apex rounded.

ascending, white to gold or light brown, 0–5-veined abaxially, 0–4-veined adaxially, narrowly lanceolate to narrowly ovate, flat except over achene or, occasionally, plano-convex, 3.4–4.1(–4.7) × 0.9–1.3 mm, 0.15–0.35 mm thick, margin flat, including wing 0.1–0.2 mm wide, usually crinkled distally;

beak brown or red-brown at tip, flat, ± ciliate-serrulate, abaxial suture inconspicuous, distance from beak tip to achene (1.8–)2.1–3 mm.

spreading to ascending, with beak and distal body of perigynium spreading or recurrent at 80º angle or greater, pale green to pale brown, conspicuously 3–6-veined abaxially, conspicuously 2–6-veined adaxially, ovate to elliptic, plano-convex, 2–3.5 times as long as wide, 2.7–4 × 1–1.7 mm, 0.3–0.4 mm thick, margin flat, including wing 0.1–0.2 mm wide, abruptly narrowed proximally, not extending to base;

beak tip usually not colored, flat, ciliate-serrulate, distance from beak tip to achene 1.5–1.8 mm.

± elliptic, 1.1–1.5 × 0.6–0.8 mm, 0.15–0.35 mm thick;

style usually persistent, sinuate.

oblong-ovate, 1.2–1.5 × 0.6–0.8 mm, 0.3–0.4 mm thick.

scales gold to dark brown, with whitish, green, or brown midstripe, lanceolate, 3–3.8 mm, shorter and narrower than perigynia, apex acuminate to short-awned.

scales white-hyaline or pale brown with green to brown midstripe not reaching tip, lanceolate, 1.6–2.3 mm, 1/2 length of and narrower than perigynia, hidden by perignyium beaks, apex acute or ultimate apex often rounded to retuse.

= 52, ca. 66, 70.

= 70.