Flora of North America species comparison

20–90 cm;

vegetative culms inconspicuous with few leaves clustered at apex.

14–30 cm.

sheaths white-hyaline or green-veined, sometimes papillose, summits U-shaped, not distally expanded;

distal ligules 2.2–6 mm;

blades 3–4 per fertile culm, 11–25 cm × 1.7–4.2 mm.

sheaths adaxially white-hyaline, summits U-shaped;

distal ligules (1–)2–2.5 mm;

blades 2–5(–8) per fertile culm, usually folded, 10.5–15 × 1–2.5 mm.

mostly dense, brown, 1.1–3 cm × 5–14 mm;

proximal internode 1–4 mm; 2d internode 1.4–3.4 mm;

proximal bracts scalelike, with bristle tips shorter than inflorescences.

dense or ± open, gold to brown, 1.4–3 cm × 5–11 mm;

proximal internode (2.5–)3.5–6 mm; 2d internode 0.8–3.5 mm;

proximal bracts usually bristlelike, shorter than inflorescences.

3–10, usually overlapping, ovoid to globose, 4–10 × 3–7 mm, base rounded or truncate, apex rounded.

4–9, aggregated or distant, individually indistinct or distinct, lanceloid to ovoid, 5–11 × 2.5–6 mm, base and apex acute to attenuate.

ascending to ascending-spreading, light to dark reddish brown, conspicuously 3+-veined abaxially, faintly or basally 1–3-veined adaxially, winged to base, ovate or elliptic, plano-convex, 2.5–3.8 × (1–)1.2–2 mm, 0.35–0.45 mm thick, 1.9–2.5 times as long as wide, margin flat, including wing 0.2–0.5 mm wide, 1b ciliate-serrulate at least distally;

beak reddish brown at tip, flat, ± ciliate-serrulate, abaxial suture with reddish brown-hyaline margin, distance from beak tip to achene 1.2–2.2 mm.

appressed-ascending to ascending, gold or whitish, boat-shaped with wings adaxially incurved, conspicuously (0–)5–10-veined abaxially, conspicuously 0–6-veined adaxially, lanceolate or occasionally ovate, plano-convex, 3.5–4.2 × 1–1.2 mm, 0.4–0.5(–0.6) mm thick, margin flat, including wing 0.05–0.2 mm wide, ciliate-serrulate at least on distal body;

beak gold to reddish or brown, white-hyaline at tip, cylindric, unwinged, entire for 0.3–0.6 mm, abaxial suture with conspicuous white margin, distance from beak tip to achene 1.5–2.2 mm, beak tip conspicuous in inflorescences.

ovate or elliptic, 1–1.3 × 0.6–0.9 mm, 0.3–0.4 mm thick.

ovate to obovate, 1.4–1.8 × 0.7–0.95 mm, 0.35–0.4 mm thick.

scales reddish brown, usually with green or whitish to brown midstripe, lanceolate, 2.5–3.5 mm, shorter and narrower than perigynia, apex acuminate or acute.

scales gold to red-brown, often with whitish or green to gold midstripe or white tip, ovate to broadly ovate, (3–)3.5–5 mm, usually longer and wider than perignyium bodies, margin white, 0.1–0.3 mm wide, apex obtuse to acuminate.

= 68, 70.