Flora of North America species comparison

15–60 cm, proximally scabrous.

to 400 cm × 4 mm, scabrous.

2.5–4 mm wide.

sheath fronts spotted red-brown, plane, apex truncate or concave;

ligule rounded, to 1 mm, free limb to 0.2 mm;

blades 15 cm × 5 mm, shorter than flowering stem.

proximal bracts usually shorter than, sometimes equaling, occasionally exceeding, inflorescences;

spikes spreading or erect, overlapping, contiguous, forming dense terminal cluster or, sometimes, proximal spikes separate, sessile, short-oblong, 7–12 × 6–10 mm;

lateral 2–3 spikes pistillate;

terminal spike gynecandrous.

loosely paniculate, 4–10 cm × 7–15 mm, the proximal branches distinctly separate;

bracts scalelike, dilated with wide hyaline edges and prominent midvein; the proximal bracts setaceous, prolonged to 10–15 mm.

ascending or spreading, pale yellow, dark brown or blackish with green or yellow-brown margins, veinless, ovate or, rarely, circular, 3–4 × 2–3 mm, apex abruptly beaked, papillose on distal margins and serrulate;

beak 0.4–0.5 mm, shallowly or deeply bidentate, often serrulate.

yellow-brown to dark brown, 5–11-veined abaxially, occasionally 3–5-veined adaxially, body ovate, 3–3.6 × 1.2–1.6 mm, base rounded or cordate, conspicuous corky tissue distending the perigynium;

beak chestnut brown, 0.6–1.5 mm, apex white-hyaline, deeply bidentate.

filling proximal 1/2 or less of perigynia.

brown, ovate, 1.5 × 1 mm.

scales dark brown or black, distal margins often hyaline, ovate or lanceolate, shorter than or as long and broad as pergynia, midvein same color as body, inconspicuous, apex acute.

hyaline, pale brown with prominent white-hyaline margins, apex acute or obtuse.