Flora of North America species comparison

dark maroon at base; flowering stems 30–90 cm, longer than leaves at maturity, 0.8–1 mm thick, glabrous but scabrous within inflorescence.

31–115 cm × 0.9–2 mm, smooth, serrulate, or scabriduous at mid height.

basal sheaths maroon, bladeless, glabrous on back;

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

blades flat, 2.8–7.2 mm wide, glabrous on both surfaces, margins smooth or finely scabrous.

ligule of distal leaf (2–)3.5–7.1 mm, 2–3.9 times as long as wide;

blades 1.8–5.9 mm wide, widest blade 2.3–5.9 mm wide.

peduncles of lateral spikes slender, 5–100 mm, finely scabrous;

peduncle of terminal spike less than 15 mm, finely scabrous;

proximal bracts equaling inflorescences or shorter;

sheaths 10–70 mm;

blades 1.5–3.5 mm wide.

(33–)40–89(–103) mm;

proximal internode 6–32 mm;

proximal bracts 14–43 mm, awn 10–39 mm;

spikes 5–9, usually gynecandrous;

proximal spikes usually with 1–4 staminate and (14–)18–31(–40) pistillate flowers, 12–22(–25) × 3.9–6.5 mm;

terminal spikes usually with 1–5 staminate and 14–28 pistillate flowers, 9.6–16 × 3.4–6.2 mm.

olive-green, copiously red dotted, conspicuously 10–12-veined, veins about equal in size, loosely enveloping achene, ovoid-ellipsoid to lance-ovoid, 4.6–9 × 1.2–2.2 mm, membranous to coriaceous, base with short stipe, apex tapering to very short beak, glabrous or short-pubescent;

beak minutely bidentate, 0.3–0.8 mm, ciliate between apical teeth.

erect to appressed-erect, green to brown, prominently to weakly 3–7-veined abaxially, prominently to weakly 0–3(–6)-veined adaxially, narrowly lanceolate, 3.4–5.2 × 1.1–1.4 mm, 2.9–4 times as long as wide, apex abruptly contracted to gradually tapering;

beak 1.5–2.5 mm, 0.4–0.53 times as long as perigynia, margins serrulate, apex bidentulate, teeth (0.2–)0.3–1 mm, (0.06–)0.09–0.2 times as long as perigynia.

distinctly stipitate, 2–2.5 × 1–1.5 mm, stipe 1–1.5 mm.

1.5–2.1 × 0.9–1.3 mm, 1.3–1.8 times as long as wide.

spikes 3–5, 1 per node, well separated, erect to nodding or drooping at maturity, pistillate with 10–40 perigynia attached 1–3 mm apart, narrowly oblong-cylindric, 10–50 × 4–5 mm.

spike staminate or sometimes gynecandrous with a few pistillate flowers distally, 12–55 × 1–2 mm.

scales suffused with reddish brown to chestnut with hyaline margins and broad green midrib, ovate-oblong, shorter than mature perigynia, apex obtuse, acute, or sometimes mucronate, glabrous except scabrous midrib.

scales with whitish to castaneous margins, (2.2–)2.5–4.1 × 1.4–2 mm, body 2.2–2.9(–3.1) mm, apex acuminate to short-awned to 1.5 mm.

scales with whitish to castaneous margins, 3.1–4.3 × 1–1.5 mm, apex acute to short-awned.

1.3–1.8 mm.

1.8–2.5 mm.

= 42, 44, 46, 48, 50.