Flora of North America species comparison

20–90 cm;

vegetative culms inconspicuous with few leaves clustered at apex.

50–85 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 often green-veined, white-hyaline at least 10 mm below summit, ± firm, summits U-shaped or rounded, prolonged to 4 mm beyond collar;

distal ligules 1–4 mm;

blades 3–6 per fertile culm, flat or folded, 14–50 cm × (2.3–)3–5 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.

usually dense, greenish or gold, usually oblong, 1.9–5 cm × 12–19 mm;

proximal internode 2.5–5(–7) mm; 2d internode 2–5.5 mm;

proximal bracts scalelike or bristlelike, shorter than inflorescences.

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

5–14, aggregated or proximal 1 more distant, narrowly to broadly ovoid, 9–18 × 6–9(–11) mm, base rounded to attenuate, apex truncate to tapered.

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 to ascending, green to straw colored, conspicuously usually 10–18-veined abaxially, conspicuously 4–10-veined adaxially, at least 3 adaxial veins longer than achene, lanceolate to ovate, plano-convex, 4.9–6.3(–7) × 1.5–1.8(–2) mm, 0.5–0.7 mm thick, margin flat, including wing 0.25–0.4 mm wide, ciliate-serrulate at least on distal body;

beak gold to red-brown at tip, flat, ± ciliate-serrulate, abaxial suture inconspicuous, distance from beak tip to achene 2.7–4.2 mm.

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

elliptic to obovate, 1.6–2(–2.3) × 1–1.5 mm, 0.4–0.5(–0.6) 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 green to gold or red-brown, with pale midstripe, lanceolate to ovate, (3.9–)4.3–5.2 mm, shorter than or ± equaling and narrower than perigynia, margin white, 0–0.5 mm wide, apex acute to acuminate.

= 68, 70.