Flora of North America species comparison

(24–)35–85 cm.

yellow-brown to red-brown at base, 25–60 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 scabrous;

blades, especially of overwintered leaves, glaucescent, widest blades (3.4–)3.7–5.8(–6.1) mm wide, smooth or papillose abaxially, papillae especially on overwintered leaves.

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.

0.22–0.86 of culm height;

peduncles of lateral spikes smooth or barely scaberulous;

peduncles of terminal spikes 6.6–42(–58) mm, barely to much exceeding lateral spikes;

proximal bract with sheath tight, abaxially scabrous, sheath front apex slightly convex, elongated 0.3–3.7(–4.4) mm;

ligules 0.7–3.4 mm;

distal bract overlapping but not exceeding terminal spike.

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

(3–)4–5(–6), separate or distal 2–4 overlapping;

lateral spikes pistillate or rarely androgynous, with (2–)3–11 perigynia, 6–39 × 3.8–6.8 mm, ratio of spike length (in mm) to flower number = 2.3–4.9;

terminal spikes (12–)18–46 × 1.4–3 mm, longest ones (25–)30–45 mm.

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.

spirally imbricate, 49–58-veined, unwrinkled, narrowly ellipsoid to obovoid, obtusely triangular in cross section, (3.7–)4–4.7(–5.1) × 1.5–1.7(–1.8) mm, (2.2–)2.5–3.1 times as long as wide, dull, base gradually tapered, apex abruptly contracted;

beak slightly excurved, (0.5–)0.6–1 mm.

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

broadly obovoid-ellipsoid to obovoid-ellipsoid, (2.5–)2.7–3.5 × 1.4–1.6(–1.7) mm, tightly enveloped by perigynia;

stipe 0.3–0.5(–0.6) mm, bent 5–45°;

beak 0.2 mm, bent 30–70°.

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 (3.5–)4.1–7 × 1.3–2.5 mm, margins whitish, entire, apex with awn (0.1–)1.2–4.1 mm.

scales 3.8–4.3 × 1.3–1.6 mm.

2.9–3.4 mm.

= 62, 64, 66, 68.