Flora of North America species comparison

(24–)35–85 cm.

green or slightly suffused with maroon at base; flowering stems 30–80 cm, usually longer than leaves at maturity, 0.8–1.1 mm thick, glabrous but finely scabrous on angles within inflorescence.

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 2–3, green or tinged with maroon, bladeless, very short or absent, glabrous;

others green on back, white-hyaline on front;

blades flat, 2–5 mm wide, glabrous.

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.

peduncles of lateral spikes slender, to 4 cm, mostly shorter and usually shorter than spikes, glabrous;

peduncle of terminal spike less than 10 mm, minutely scabrous;

proximal bracts equaling or exceeding inflorescences;

sheaths less than 3 mm;

blades 2–3 mm wide.

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.

green to golden green at maturity, strongly 2-ribbed but otherwise veinless or nearly so, loosely enveloping achene, lance-ovoid, 2.5–4 × 1–1.5 mm, membranous, base with short stipe, apex tapering to flattened, often bent beak, glabrous;

beak 1–1.5 mm, with minute hyaline teeth.

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

substipitate, 1.3–2 × 1–1.2 mm.

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 white-hyaline with broad green midrib, ovate-oblong, shorter than mature perigynia, apex cuspidate or with green awn about as long as body of scales, scabrous at tip, otherwise glabrous.

spikes 2–4, 1 per node, each overlapping 1 above, uncrowded, nodding or drooping at maturity, pistillate with 25–50 perigynia, narrowly cylindric but broader and more densely flowered at distal end (flowers 1 mm apart) than proximal end (flowers 3.5 mm apart), 15–60 × 3.5–5.5 mm.

spike staminate or gynecandrous with a few pistillate flowers distally, 25–40 × 2.5–4 mm.

= 62, 64, 66, 68.

= 60.