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.

21–47 cm, scabrous distally;

bases (remnants of old leaves) fibrous.

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.

blades green, shorter than culms, 2–3.5 mm wide, herbaceous to coriaceous, papillose to scabrous abaxially, papillose to slightly scabrous adaxially.

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.

with both staminate and pistillate spikes;

peduncles of staminate spikes 1.1–10 mm;

proximal nonbasal bracts leaflike, equaling or exceeding inflorescences.

proximal pistillate spikes 2–5 (basal spikes 0);

cauline spikes with the proximal separated, with 4–10 perigynia;

staminate spikes (5.3–) 9.6–26.2 × (1–)1.4–3.4 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.

pale green to yellow or pale brown, 10–25-veined to at least mid body, obovoid to globose, 3.1–4.2 × 1.5–2.4 mm, as long as wide;

beak straight, pale green to pale brown, 0.4–1.1 mm, smooth, apical teeth 0.1–0.4 mm.

substipitate, 1.2–2.6 × 1–1.2 mm.

brown, globose, round in cross section, 1.6–2.6 × 1.5–2.4 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.

pistillate scales whitish or pale brown to dark reddish brown, with narrow to broad white margins, ovate to lanceolate, 4.2–4.5 × 1.7–2.5 mm, equaling perigynia, apex acuminate or short-awned;

staminate scales ovate to obovate, 6–6.2 × 1.6–2 mm, apex obtuse or acute to acuminate or short-awned.

2.2–3.3 mm.

3.

= 50, 52, 54.