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.

5–17 cm, scabrous distally;

bases (remnants of old leaves) weakly 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, occasionally glaucous, exceeding culms, 1.7–3 mm wide, herbaceous, papillose to scabrous abaxially, papillose to 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 0.3–1.2 mm;

proximal cauline bracts leakflike, shorter than inflorescences.

proximal pistillate spikes 2–3 (basal spikes 0);

cauline spikes overlapping, proximal 2 separated by less than 7 mm, with 4–8 perigynia;

staminate spikes (3–)6.1–9.3 × 1.1–1.7 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, veinless, ellipsoid, 3–4.1 × 0.9–1.4 mm;

beak straight, pale green, 0.6–0.9 mm, weakly ciliate-serrulate, apical teeth 0.1–0.3 mm.

substipitate, 1.2–2.6 × 1–1.2 mm.

brown, ellipsoid, biconvex, flattened-trigonous, or evenly trigonous with convex sides (all three types may occur on the same plant), 1.5–2 × 0.9–1.3 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 to dark reddish brown, with narrow white margins, ovate to lanceolate, 2.7–4.2 × 1.2–2 mm, shorter than to equaling perigynia, apex acute to acuminate or short-aristate;

staminate scales lanceolate, 2.8–4 × 1.2–1.8 mm, apex obtuse or acute to acuminate.

1.8–2 mm.

2(–3).

= 50, 52, 54.