Flora of North America species comparison

(9–)16–60 cm.

erect, ascending, or spreading, 9–48 cm × 0.6–1 mm.

sheath adaxially white-hyaline, summits usually U-shaped, rarely prolonged to 3 mm beyond collar;

distal ligules 0.5–2.5(–3) mm;

blades 2–6 per fertile culm, (4–)8–18 cm × (1.7–)2–3.6(–4) mm.

basal sheaths white or very light brown;

nonbasal sheaths 7–32 mm, sheath blades 0.9–11.9 cm × 1–7 mm;

leaf blades erect, ascending, or spreading, green or glaucous, 8–36 cm × 3–12 mm;

blades of vegetative shoots 0–3.5 times wider than bract blades.

stiffly erect, dense, brown or dark brown, 0.9–2.1 cm × 10–15(–18.5) mm;

proximal internode 1.5–3.7(–4.8) mm; 2d internode 1–3 mm;

proximal bracts scalelike or bristlelike, shorter than inflorescences.

spikes (3–)4(–5) per culm, scattered;

peduncles of pistillate spikes exserted 0–9 cm; of staminate spikes exserted 0–9.5 cm;

bracts 2–11.8 cm × 1.3–4.8 mm.

(3–)5–9, densely aggregated, ± individually indistinct, ovoid to broadly ovoid, 5.5–10.5 × 4–7 mm, base rounded to acute or tapered, apex truncate to tapered.

appressed-ascending to ascending-spreading, straw colored, gold, red-brown, or coppery, conspicuously 0–7(–11)-veined abaxially, conspicuously 0–3-veined adaxially, narrowly to broadly ovate, plano-convex to biconvex, occasionally ± flat around achene, 3.5–4.5 × (1.1–)1.3–2 mm, 0.4–0.5 mm thick, margin flat, including wing 0.2–0.5 mm wide, darker than perigynium body, ciliate-serrulate at least on distal body, pithlike tissue usually present in proximal perigynium walls in U-shape around achene, glossy metallic sheen;

beak white, golden brown, red-brown, brown, or dark brown, usually white-hyaline at tip, cylindric, unwinged, ± entire for (0.4–)0.5–0.6(–0.9) mm, abaxial suture usually white, conspicuous, distance from beak tip to achene (1.2–)1.6–2.4 mm.

4–9 per spike, finely veined, elliptic-ovoid, 2.5–4 × 1.5–2 mm;

beak slightly bent, tapering.

slender ascending through entire orifice.

usually elliptic, (1.2–)1.4–1.9 × 0.85–1.1 mm, 0.35–0.5 mm thick.

obvoid to broadly ovoid, 2.2–3.2 × 1.2–1.8 mm, slightly concave at maturity, tightly fitting in perigynia.

scales gold to brown, often reddish, sometimes with whitish or gold midstripe, ovate to broadly ovate, 2.7–3.5(–4) mm, shorter or longer and usually narrower than perigynia, margin, white-hyaline usually conspicuous, 0.03–0.25 mm wide, apex usually obtuse.

spikes: the proximal basal, scattered, drooping.;

pistillate scales keeled, 2.5–3.2 × 1–1.5 mm, midribs green, margins hyaline or, occasionally, reddish brown outward, apex cuspidate to acute, awn to 1 mm, proximal scale of lateral spike sterile or subtending a staminate flower.

spike 1, linear, 8–22 × 1.2–3 mm.;

staminate scales obovate, 3.5–4.5 × 1–1.2 mm, midribs green, margins hyaline or reddish brown outward, apex acute.

2–3 mm.

= 86.

= 44, 46.