Flora of North America species comparison

10–90(–135) cm.

dark maroon at base; flowering stems 20–100 cm, much longer than leaves at maturity, 0.6–1 mm thick, glabrous but scabrous within inflorescence.

3–6 per culm;

sheaths tight, inner band hyaline, 1.8–2.5 cm, apex concave, glabrous;

ligules 0.6–2.5(–4.5) mm, rounded to ± acute;

blades plicate, 5–40 cm × 0.7–3.3(–3.8) mm, widest leaf 1–3.3(–3.8) mm wide.

basal sheaths maroon, bladeless, rarely minutely scabrous, glabrous;

others grading from maroon to green on back, white to tan-hyaline on front, minutely red dotted;

blades flat, 3–10(–13) mm wide, glabrous with minutely scabrous margins.

0.7–7.8 cm;

spikes (2–)3–8;

lateral spikes pistillate often with few staminate flowers proximally, 3–15.5 mm, sessile, staminate portion 7-flowered, to 8.2 mm, pistillate portion 3–32-flowered, 2.5–11 mm;

basal 2 spikes 1.7–42 mm apart;

terminal spike gynecandrous, 5–24 mm, staminate portion 2–17-flowered, 2–16.5 × 0.9–2 mm, pistillate portion 4–26-flowered, 2.6–9 × 4.9–9.1 mm.

peduncles of lateral spikes slender, to 30 mm, shorter than spikes;

peduncle of terminal spike to 28 mm, usually shorter than adjacent pistillate spikes, minutely scabrous on angles;

proximal bracts shorter than inflorescences;

sheaths to 30 mm;

blades 2–3 mm wide.

spreading to reflexed, castaneous to dark brown, 2–14-veined abaxially, 0–12-veined adaxially over achene, lanceolate to ovate, (2.65–)2.9–4.75 × 0.8–2.1 mm, (1.7–)1.8–3.2(–3.6) times as long as wide;

beak (0.85–)0.95–2 mm, (0.4–)0.45–0.86 length of body, serrulate, teeth (0–)0.15–0.5 mm.

green, often red dotted, 2-ribbed and finely 10–15-veined, loosely enveloping achene, ellipsoid-ovoid, 3–5 × 1–2 mm, membranous, base with stipe 2–3 mm, apex tapering to minute beak, glabrous but sometimes ciliate between apical teeth;

beak bidentate, 0.7–1.5 mm.

ovate-lanceolate to rhombic-ovate, 1.3–2.1 × 0.8–1.55 mm.

sessile, 1.7–2.6 × 0.8–1.7 mm.

scales ovate, (1.4–)2.1–3.1 × 0.7–2.3 mm, apex acute to sometimes obtuse.

scales white-hyaline with green midrib, oblong-lanceolate, shorter than mature perigynia, apex acuminate to cuspidate or awned, awn to 1.5 mm, margins and awn scabrous or ciliate, otherwise glabrous.

scales ovate-lanceolate to ovate, 1.3–3.8 × 0.8–1.7 mm, base clavate, apex acute.

0.8–1.6(–2) mm.

spikes 2–5, 1 per node, well separated, erect at anthesis, but soon drooping, pistillate with 15–45 perigynia attached 1–2 mm apart, linear-elongate, 25–80 × 3–4 mm.

spike staminate, sessile or pedunculate, 6–40 × 0.8–2 mm.

= 58.

= 52, 54, 56.