Flora of North America species comparison

20–90 cm, 1.7–2.2 mm wide basally, 0.7–1.1 mm wide distally.

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

sheaths tight, green, sometimes white spotted, fronts hyaline, sometimes transversely rugose, mouth yellowish and thickened;

ligules to 3 mm, usually wider than long;

widest leaf blades 2–4 mm wide, papillose adaxially.

basal sheaths pale brown;

ligules usually much longer than wide;

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

with 3–10 spikes, 1.5–4 cm × 8–12 mm;

proximal internodes equaling or shorter than proximal spikes;

proximal bracts less than 2 cm;

spikes with 8–20 ascending or spreading perigynia.

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.

pale green to yellow-brown, 9–15-veined abaxially, margins serrulate distally;

beak 0.2–1.2mm, apical teeth 0.2–0.5 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.

suborbiculate, 1.9–2.2 × 1.9–2.1 mm.

pale brown, trigonous, smooth.

scales hyaline with green, 3-veined center, ovate to ovate-circular, body narrower than and 2/3 to length of perigynium, apex acute or with awn 0.5–1.5(–2) 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.

1.5–2.3 mm.

scales scabrous-awned, sometimes ciliate-margined.

3.