Flora of North America species comparison

to 100 cm × 2 mm, scabrous.

dark maroon at base; flowering stems 0.5–1 mm thick, 30–80 cm, longer than leaves at maturity, glabrous but scabrous on angles within inflorescence.

sheath fronts spotted red-brown or pale brown, apex truncate or short-convex, membranous or hyaline, rugose;

ligule retuse or rounded, to 2 mm, free limb to 0.2 mm;

blades 120 cm × 5 mm, longer than flowering stem.

basal sheaths maroon, bladeless, pubescent, sometimes glabrous, others grading from marooon to green on back, white-hyaline, red dotted, and pilose on front;

blades flat, 3–7 mm wide, glabrous on adaxial surface, pilose on abaxial surface and margins.

spicate, (3–)7–10 cm × 15 mm, with 10–15 branches, the proximal branches distinctly separate; the proximal internode to 25 mm;

bracts setaceous, those subtending at least the proximal lateral branches conspicuous.

;

peduncles of lateral spikes slender, to 10 cm, usually much longer than spikes, pubescent; of terminal spikes 25–50 mm, pubescent;

proximal bracts nearly equaling but usually not exceeding inflorescences;

sheaths 35–85 mm;

blades 2.5–4.5 mm wide.

green to pale brown, veinless on both faces or 3-veined abaxially, body ovate or elliptic, 2–3.2 × 1.3–1.8 mm, base obtuse;

beak 0.8–1.2 mm, 1/3–1/2 length of perigynium.

green, copiously red dotted, 2-ribbed with 7–12 fine veins on each face, loosely enveloping achene, ovoid-ellipsoid, 3.5–5 × 1.7–2 mm, membranous, base with short stipe, apex narrowing to abrupt beak, glabrous;

beak minutely bidentate, less than 0.5 mm.

red-brown, ovate, 1.2–1.4 × 1 mm, glossy.

substipitate, 2–2.5 × 1.4–1.5 mm.

pale brown, hyaline, awn to 3 mm.

spikes 2–4, 1 per node, well separated, drooping at maturity, pistillate except for 1 or 2 basal staminate flowers in each, with 8–25 perigynia per spike attached 1 mm apart, cylindric, 15–25 × 4–6 mm.

spike gynecandrous, 15–30 × 5–6 mm in distal pistillate portion, 1.5–2 mm wide in proximal staminate portion.

scales pale hyaline tinged with chestnut brown, broad green midrib red dotted, ovate, shorter than mature perigynia, apex acute to cuspidate, awn less than 1 mm, glabrous.

= 52.