Flora of North America species comparison

15–38 cm.

dark maroon at base; flowering stems 25–80 cm, much longer than leaves at maturity, 1–1.8 mm thick, glabrous but scabrous on angles, especially within inflorescence.

sheath summits white-hyaline, green ribbed, U-shaped, occasionally prolonged to 4 mm distal to collar;

distal ligules 1–3(–3.5) mm;

blades 2–4 per fertile culm, 4.5–18 cm × 1.5–2.5 mm.

basal sheaths maroon, bladeless, glabrous on back;

others grading from maroon to green on back, brown-hyaline and usually red dotted on front, glabrous or often pubescent near apex;

blades flat, 2.5–5.5 mm wide, usually less than 4 mm wide, glabrous or sparingly rough-hispidulous on 1 or both surfaces, margins scabrous, especially distally.

nodding, dense, dark or medium brown, 1–1.2 cm × 5.5–10 mm;

proximal internode 1.3–3 mm; 2d internode 0.6–1.5 mm;

proximal bracts scalelike to bristlelike.

peduncles of proximal spikes 0–65 mm and finely scabrous;

peduncle of terminal spike 0–12 mm, scabrous;

proximal bracts equaling or exceeding inflorescences;

sheaths 8–40 mm;

blades 1–4 mm wide.

3–6, usually individually indistinct, ovoid to broadly ovoid, 4.5–6.5 × 2.5–5.5 mm, base and apex acute to rounded;

terminal spike without conspicuous staminate base.

ascending-spreading to spreading, gold to dark brown, conspicuously 0–7-veined abaxially, conspicuously 0–4-veined adaxially, ovate, plano-convex, 2.6–3.2 × 0.9–1.3 mm, 0.5–0.65 mm thick, margin unwinged, pithlike tissue usually present in proximal perigynia walls;

beak medium or dark brown at tip, often with white-hyaline, cylindric to somewhat flat, abaxial suture with conspicuous white margin, distance from beak tip to achene 1.2–1.6 mm, entire.

green to golden green, usually blotched or dotted with dark red, 2-ribbed and finely 12–15-veined, veins more obvious on abaxial side, loosely enveloping achene, oblong-lanceolate, 2.7–5 × 0.8–1.8 mm, membranous, base acute, apex tapering to beak, sparsely pubescent toward apex;

beak minutely bidentate, 0.3–1 mm, ciliate between apical teeth.

ovate to obovate, 1.2–1.5 × 0.8–1 mm, 0.4–0.5 mm thick.

sessile, 1.6–2.5 × 0.9–1.5 mm.

scales dark brown, usually with pale or green midstripe, ovate, 1.5–2.5(–3.5) mm, usually shorter, narrower than perigynia, margin occasionally hyaline gold, to 0.4 mm wide, apex obtuse or acute.

scales with green midrib and broad pale hyaline margins suffused with reddish or golden brown, broadly ovate, shorter than mature perigynia, apex acute to rounded, sometimes cuspidate, margins ciliate distally, otherwise glabrous.

spikes 3–5, 1 per node, well separated, erect or arching at maturity, pistillate with 20–45 perigynia attached 0.5–2 mm apart, rarely the distal staminate, linear to narrowly cylindric, 10–60 × 2.5–6 mm.

spike staminate, rarely with a few perigynia, sessile or pedunculate, 18–38 × 1.2–4 mm.

= 64

= 56, 58, 60.