Flora of North America species comparison

dark maroon at base; flowering stems 0.5–1.1 mm thick, 20–90 cm, much longer than leaves at maturity, glabrous, but often scabrous within inflorescence.

30–90 cm, sparsely pilose.

sheaths glabrous or short-pubescent, basal few bladeless and maroon, others grading from maroon to green on back, pale brown-hyaline, red dotted and sometimes pubescent near apex;

blades flat, 3–9 mm wide, glabrous, minutely scabrous on margins distally.

sheaths pilose;

ligules as long as or slightly longer than wide;

blades 1.5–4 mm wide, pilose.

peduncles of lateral spikes slender, to 40 mm, equaling spikes or usually somewhat shorter, scabrous;

peduncle of terminal spike to 13 mm, glabrous or scabrous;

proximal bracts shorter than inflorescences;

sheaths 20–25 mm;

blades 3–4 mm wide.

terminal spike gynecandrous, at least 1/2 of flowers pistillate, 12–22 mm;

lateral spikes usually crowded, 6–16 × 4.5–11 mm.

green, usually red dotted, 2-ribbed and finely 8–12-veined, veins more obvious near base, ellipsoid to oblong-ovoid, loosely enveloping achenes, 2–3.7 × 1.3–1.6 mm, membranous, acute at base, tapering gradually to acute beakless apex, glabrous.

spreading, 9–13-veined, obovate-circular, circular in cross section, 2.5–4 × 1.4–2.1 mm, papillose, pubescent;

beak absent.

substipitate, 1.2–2.6 × 1–1.2 mm.

2–2.6 × (1.1–)1.4–1.7 mm.

spikes 2–5, 1 per node, well separated, drooping at maturity, pistillate with 10–45 perigynia attached 2 mm apart, linear, 10–70 × 2–3.5 mm.

spike gynecandrous, 10–60 × 1–3 mm.

scales white-hyaline tinged with chestnut, broad green midrib often red dotted, sometimes scabrous, ovate to oblong, shorter than mature perigynia, apex rounded or cuspidate with ciliate awn less than 1 mm, otherwise glabrous.

scales lanceolate, 2.5–3.5(–5) × 1.1–1.5(–1.7) mm, exceeding perigynia, apex acuminate, at least proximal scale with awn 0.5–2 mm.

scales lanceolate, 3.2–5.2 mm, apex acuminate, often awned.

2–3 mm.

= 50, 52, 54.

= 64.