Flora of North America species comparison

20–91 cm.

often arching, weak, 10–40(–60) cm.

sheaths adaxially white-hyaline, sometimes gold tinged near summit, summit U-shaped or zigzag to rounded, prolonged to 3 mm beyond collar;

distal ligules 1.5–4 mm;

blades 3–4 per fertile culm, to 7–30 cm × 1.6–3.9 mm.

sheaths pale to mid brown abaxially, inner band thin and hyaline, concave at summit;

ligules as wide as long, 2–8 mm;

blades usually gray-green, flat to channeled, 5–15 cm × 1–2 mm, usually shorter than culms.

dense or open, gold to brown, occasionally beaded, 1.7–4.8 cm × 6–16(–23) mm;

proximal internode 3.5–7.5 mm; 2d internode 2–5.5 mm, these 2 internodes collectively more than 1/3 as long as inflorescences;

proximal bracts usually bristlelike, shorter than inflorescences.

erect, 1–2 cm × 5–12 mm;

proximal bracts usually scalelike, shorter than spikes.

(3–)5–12, distant, loosely aggregated, ovoid to broadly ovoid, 6–14.5 × 2.5–9.2 mm, base rounded to attenuate, apex truncate, rounded, or sometimes tapered.

2–4, closely approximate, individually distinct, proximal lateral spikes pistillate, containing 5–10(–15) perigynia, oblong-linear;

terminal spike gynecandrous, containing 10(–20) perigynia, clavate.

ascending, green or straw colored to coppery, conspicuously 6–11-veined abaxially, (0–)4–5(–8)-veined adaxially, veins reaching top of achene, lance-ovate to ovate, plano-convex or biconvex, 3.4–4.8(–5.3) × 1.1–1.6(–2.2) mm, 0.4–0.65 mm thick, margin flat, including wing 0.15–0.4 mm wide, ciliate-serrulate at least on distal body;

beak gold to brown, usually reddish, at tip, cylindric, unwinged, ± entire for 0.5–0.6 mm, abaxial suture inconspicuous or with conspicuous white margin, distance from beak tip to achene 1.5–2.5 mm.

ascending, light to pale brown, often gray-brown at maturity, lightly or obscurely several-veined, from broadly elliptic-obovate to lanceolate, 1.5–3.5 × 1.–1.5 mm, widest near middle, subcoriaceous;

beak short, entire.

elliptic to ovate or, rarely, broadly ovate, 1.5–2 × 0.9–1.3 mm, 0.4–0.6 mm thick.

mid brown to red-brown, elliptic, 1.5 × 1–1.25 mm, dull to slightly glossy.

scales gold to brown and often reddish, with whitish or green midstripe, ovate to broadly ovate, (2.5–)3.5–4.7 mm, usually shorter than and narrower or as wide as perigynia, margin white, 0–0.2 mm wide, apex obtuse to acuminate.

scales pale to red-brown with yellow-brown center and white-hyaline margins, oblong-ovate, subequal to perigynia, apex obtuse.

= 66.