Flora of North America species comparison

erect, not stiff, 15–90 cm.

sharply trigonous in cross section, (15–)25–95(–110) cm, scabrous-angled distally.

sheaths pale brown abaxially, inner band thin, hyaline, sometimes slightly red tinged, concave at summit;

ligules slightly longer than wide;

blades pale green to gray-green flat, 10–20(–30) cm × (1.5–)2–4 mm, subequal to shorter than culms, not stiff.

basal sheaths reddish purple;

ligules as wide to slightly longer than wide;

blades dark green, flat to W-shaped, widest leaves (4–)4.5–11.5(–13) mm wide, glabrous.

2–15 cm × 5–10 mm;

proximal bracts shorter than to exceeding spikes;

distal bracts usually scalelike.

2.7–18 cm;

proximal bract 9–45 cm, exceeding inflorescence;

proximal 1–3(–4) spikes pistillate, erect or the proximal often spreading, (12–)15–22 mm thick, if spikes less than 15 mm thick, then usually less than 2.5 times as long as wide;

terminal 1 spike staminate.

4–8, gynecandrous, proximal ± remote, distal spikes approximate, sometimes flexuous, containing (5–)10–20(–30) perigynia suborbicular to oblong, 3–12 × 3–5 mm;

terminal spike staminate for less than 1/2 of length, often clavate due to more conspicuous staminate part.

appressed-ascending, gray-green, becoming yellowish brown, obscurely many-veined, elliptic-ovate, 1.8–3 × 1.2–1.7 mm, widest near middle, membranous;

beak abaxial suture inconspicuous, small marginal teeth.

spreading, strongly 7–12-veined, veins separate nearly to beak apex, broadly ovate, (6–)6.5–10.8 × (1.8–)2–3.5(–4.2), apex contracted;

beak 2.5–5.9 mm, 0.7–0.9 length of body, bidentate, smooth, teeth straight, to 0.2–0.8 mm.

pale brown, oblong-obovate, 1.25–1.5 × 1–1.25 mm, dull to slightly glossy.

yellow to brown, trigonous, papillose.

scales hyaline with green, 3-veined center when young, usually brownish tinged in age, broadly ovate, subequal to, not concealing perigynia, apex obtuse to acutish.

scales narrowly oblong, 3.4–11.2 × 0.5–1.1 mm, as long as or shorter than perigynia, margins often ciliate, apex truncate to retuse, erose, prolonged to scabrous awn.

scales with distinct, scabrous awn, sometimes ciliate-margined.

3.

= 56.