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.

10–110 cm.

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.

3–5 per culm;

sheaths tight, inner band hyaline, 3.5–24 cm, apex concave, glabrous;

ligules rounded to obtuse, 0.5–3.7 mm;

blades plicate, 8–60 cm × 0.4–4(–4.5) mm, widest leaf 0.8–4(–4.5) mm wide.

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.

0.8–5.5 cm;

spikes 2–8;

lateral spikes pistillate often with a few staminate flowers proximally, 3.1–13.1 mm, sessile, staminate portion 10-flowered, to 6.5 mm, pistillate portion 3–40-flowered, 2.5–12 mm;

basal 2 spikes 1.5–18 mm apart;

terminal spike gynecandrous, 4.8–23.7 mm, staminate portion 2–21-flowered, 1.8–13.5 × 0.8–1.3 mm, pistillate portion 4–38-flowered, 3–11 × 4.4–7.5 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.

spreading to reflexed, green, 6–13-veined abaxially, (0–)1–12-veined adaxially over achene, broadly ovate to suborbicular, cuneate or concavely tapered from widest point to beak, 1.9–3.8 × (1.3–)2.1–3 mm, 1.1–1.7(–1.9) times as long as wide;

beak 0.45–1.25 mm, 0.23–0.5(–0.63) length of body, serrulate, teeth 0.15–0.45 mm.

substipitate, 1.3–2 × 1–1.2 mm.

deltate to rhombic-orbiculate, 1–1.9 × 1–1.7 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.

scales ovate to ± suborbicular, 1.2–2.4 × 1.2–2 mm, apex obtuse to acute.

scales ovate-lanceolate to ovate, 1.3–3.5 × 0.8–1.4 mm, base clavate, apex acute to obtuse.

0.6–1.5(–1.8) mm.

= 60.