Flora of North America species comparison

(24–)35–85 cm.

20–120 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 white-hyaline or green-and-white mottled, papillose, summits U-shaped, shortly prolonged beyond collar;

distal ligules 2–3 mm;

blades 3–6 per fertile culm, green, without auricles, 8–30 cm × 2–4 mm, pliable.

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.

open, usually with widely spaced spikes, flexible, brown or greenish brown, 1.5–8 cm × 7–15 mm;

proximal internode 5–25 mm; 2d internode 4–12 mm;

proximal bracts scalelike, sometimes bristlelike to 1 cm.

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

3–7(–11), usually distant, oblong to ellipsoid, 7–25 × 5–7 mm, base clavate to attenuate, apex usually rounded.

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.

erect-ascending, green or brown, conspicuously 4–9-veined abaxially, veinless or conspicuously unequally 4–8-veined adaxially, ovate, plano-convex or concavo-convex, 3.3–5 × (1.5–)1.7–2.5 mm, 0.6–0.8 mm thick, margin flat, including wing 0.2–0.4 mm wide, smooth or ciliate-serrulate at least on distal body;

beak white or brown, white margin at tip, flat, ± ciliate-serrulate, abaxial suture inconspicuous or with white margin, distance from beak tip to achene (1.4–)1.7–2.5 mm.

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

dark brown at maturity, ovoid-orbicular, 1.3–2.1 × 1.2–1.7 mm, 0.5–0.6 mm thick, 1–1.4(–1.5) times as long as wide.

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 usually reddish brown, or green or gold in shade forms, with 3-veined green or brown midstripe, ovate, 4–5 mm, equaling, ± covering perigynia, apex acute to acuminate.

= 62, 64, 66, 68.

= 82, 84.