Flora of North America species comparison

(24–)35–85 cm.

20–150 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.

basal sheaths red-brown or brown;

sheaths of proximal leaves glabrous, fronts with indistinct spots, veinless, apex U-shaped;

blades usually amphi-stomic, papillose on both surfaces.

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.

proximal bract longer than inflorescence.

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

erect;

proximal 2–6 spikes pistillate;

terminal (1–)2–4 spikes staminate.

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.

ascending, veinless, somewhat flattened, loosely enclosing achenes, ellipsoid or obovoid, dull, apex obtuse or acute, papillose.

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

not constricted, glossy.

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 red-brown to purple-brown, apex obtuse or acute, awnless.

= 62, 64, 66, 68.

= 72–80.