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.

to 70 cm × 1.5 mm, scabrous.

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 usually all with blades, proximal 2–3 to 10 cm with reduced blades, green, fronts of proximal sheaths herbaceous, prominently veined, not splitting, apex truncate, fronts of distal sheaths hyaline, indistinctly veined with linear veins, smooth, apex colorless, thickened concave, entire;

ligules obtuse, 1.5 mm, free limb to 0.5 mm;

blades not clustered at base, not epistomic, to 60 cm × 5 mm.

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.

very condensed, ovoid, with 5–10 individually indistinguishable branches, 2.5 × 1.5 cm;

proximal internode not visible, not more than 3 mm;

proximal bracts scalelike, inconspicuous.

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.

pale brown, 15-veined abaxially, 7–12-veined adaxially, to 4.5 × 2 mm, base distended only slightly proximally, cordate;

stipe to 0.2 mm;

beak to 2 mm, smooth or subserrulate, apical teeth to 0.3 mm.

substipitate, 1.2–2.6 × 1–1.2 mm.

ovate, to 2 × 1.5 mm;

stalk to 0.2 mm;

persistent style base cylindric.

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.

hyaline, brown, subequal to perigynia, acute.

= 50, 52, 54.