Flora of North America species comparison

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.

10–45 cm, smooth to scabrous distally;

bases (remnants of old leaves) slightly or not at all fibrous.

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.

blades pale to bright green, shorter to longer than culms, 0.8–2.5 mm wide, herbaceous, smooth to scabrous abaxially, papillose to scabrous adaxially.

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.

with both staminate and pistillate spikes;

peduncles of staminate spikes 0.4–9.9 mm;

proximal nonbasal bracts leaflike, shorter than inflorescences.

proximal pistillate spikes 1–4 (basal spikes 0);

cauline spikes overlapping, proximal 2 spikes usually separated by less than 7 mm, with 4–14 perigynia; staminate spikes 5–14 × 0.5–1.8 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.

pale green, veinless, ellipsoid, 2.3–3.3 × 0.8–1.2 mm, longer than wide;

beak straight, pale green, 0.6–1.1 mm, weakly ciliate-serrulate, apical teeth 0.1–0.4 mm.

substipitate, 1.3–2 × 1–1.2 mm.

brown, ellipsoid, acutely trigonous in cross section, 1.2–1.7 × 0.7–1.3 mm.

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.

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.

pistillate scales pale to dark reddish brown, with narrow white margins, lanceolate to ovate or obovate, 2.2–3.4 × 0.4–1.8 mm, equaling or exceeding perigynia, apex usually acuminate, sometimes acute or mucronate; staminate scales lanceolate to ovate, 2.8–6 × 0.6–1.9 mm, apex acute to acuminate.

1.5–2.7 mm.

3.

= 60.