Flora of North America species comparison

(24–)35–85 cm.

with angles smooth proximally, 17–70 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, 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.

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.

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.

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

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, 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.

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.

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

= 62, 64, 66, 68.