Flora of North America species comparison

trigonous in cross section, 50–120 cm, scabrous distally.

to 30 cm.

basal sheaths pale brown;

ligules usually much longer than wide;

blades mid to dark green, flat to W-shaped, 5–16 mm wide, glabrous.

blades 1.5–3.5 mm wide.

4–35 cm;

proximal bract 15–85 cm, much longer than inflorescence;

proximal (2–)3–6 spikes pistillate, erect or the proximal pendent, cylindric, 12–18 mm thick;

terminal staminate or, sometimes, gynaecandrous, androgynous, or mixed.

1–12 cm, proximal internodes 5–50 mm;

peduncles of proximal spikes to 5 cm;

proximal bracts with blade 0–15(–40) mm, sheath cylindric, (3–)4–22 mm, mouth 0.5–1.2 mm wide.

(2–)3–4(–5);

lateral spikes pistillate, the proximal inclined or pendent, 6–21 × 3–6 mm;

terminal spike gynecandrous, rarely staminate, pendent, 8–10 × 3.5–5 mm.

spreading to reflexed when mature, strongly 14–22-veined, most veins separated by less than 2 times their width, confluent at or proximal to mid beak, tightly investing achene, narrowly elliptic to lanceolate, (4.8–)6.2–8.7 × 1.1–1.8 mm, leathery, apex gradually tapered;

beak poorly defined, 2–3.8 mm, bidentate, teeth outcurved, 1.3–2.1(–2.8) mm.

ascending, pale brown proximally, black or dark brown distally, veins indistinct, lanceolate, 3.3–5.5 × 0.9–1.3(–1.4) mm, margins ciliate, glabrous;

beak indistinct.

pale brown, trigonous, smooth.

obovoid, 1.5–2 × 0.9–1 mm.

scales lanceolate-acuminate, 2.8–12 × 0.4–1 mm, all but the proximal shorter than perigynia, margins ciliate, apex tapering to long scabrous awn.

scales black or brown with pale, weak midvein and very narrowly scarious margins, ovate, 2.8–4.2 × 1.4–2.4 mm, apex obtuse to acuminate.

scales scabrous-awned, sometimes ciliate-margined.

scales brown to black with pale midvein and scarious margins, oblong-obovate to obovate, 3–5 × 1.4–1.8 mm.

3.

1.2–2.7 mm.