Flora of North America species comparison

20–90 cm;

vegetative culms inconspicuous with few leaves clustered at apex.

with angles smooth proximally, 17–70 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, often tinged brown distally, summit usually U-shaped, sometimes prolonged to 1.5 mm beyond collar;

distal ligules 0.5–1.5(–3) mm;

blades (2–)3–4 per fertile culm, 8–20 cm × 2.2–3.8 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, dark or chestnut brown or brown and green (gold), 1.2–2(–2.5) cm × 8–15 mm;

proximal internode 1–3(–4) mm; 2d internode 0.5–3 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.

5–9(–12), densely aggregated, individually indistinct, ovoid or broadly ovoid, 7.5–11 × 3.5–6.5 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-ascending to ascending, green to straw colored, conspicuously 6–8-veined abaxially, conspicuously 3–4(–6)-veined adaxially, at least 3 veins longer than achene, narrowly lanceolate to lanceolate, biconvex, 4–5.1 × 1–1.3(–1.5) mm, (0.4–)0.5–0.55 mm thick, margin flat, including wing 0.1–0.25 mm wide, ciliate-serrulate at least on distal body, pithlike tissue usually present in proximal perigynium walls;

beak usually dark brown at tip, cylindric, unwinged, ± entire for 0.5–0.9 mm, abaxial suture inconspicuous or with white margin, distance from beak tip to achene 2.2–3.1 mm.

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

narrowly elliptic to oblong, (1.1–)1.4–1.8 × 0.6–0.9 mm, 0.3–0.5 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 brown, with pale to gold midstripe, lanceolate to ovate, 3.1–3.8 mm, shorter than and narrower than or as wide as perigynia, margin usually not white, apex obtuse to long-acute.

= 68, 70.