Flora of North America species comparison

(24–)35–85 cm.

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

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.

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, 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.

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.

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

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

beak slightly bent, tapering.

slender ascending through entire orifice.

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

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

scales 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.

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.

= 62, 64, 66, 68.

= 44, 46.