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.

8.8–28 cm.

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.

basal sheaths dark reddish to purplish brown;

blades mostly basal, dark green, equaling or mostly exceeding culms, 1.4–4 mm wide, thick, margins smooth or scabrous.

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.

peduncles of basal pistillate spikes filiform, arching, to 13 cm;

peduncles of terminal staminate spikes 2–6 cm;

proximal bracts short-sheathing;

pistillate spikes 2–5, mostly emerging from basal nodes, proximal spikes arching, distal ones ascending, short-pedunclulate, widely separated, often with 1–2 staminate flowers at apex, obovoid to ellipsoid;

terminal staminate spikes usually with 2–5 pistillate flowers at base, 7.5–9.8 × 1.8–2.3 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.

obovoid to oblanceoloid, 3.7–6 × 1.4–1.7 mm, base tapering, pubescent with short straight hairs;

beak bent, 0.2–0.4 mm.

substipitate, 1.2–2.6 × 1–1.2 mm.

ellipsoid, 2.5 × 1.5–1.6 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 pale brown to reddish brown, ovate to obovate, apex retuse or truncate to obtuse, cuspidate;

staminate scales dark reddish brown, ovate, apex cuspidate.

2–3.6 mm.

3, thin, flexuous, strongly papillose.

= 50, 52, 54.

= 26.