Flora of North America species comparison

solitary or not, erect, 50–130 cm.

to 90 cm.

4–7;

basal sheaths brownish;

sheath of distal leaf 3–21 cm;

ligules rounded to triangular, 6–28 mm;

blades 30–80 cm × 6–13 mm.

6–40 cm;

peduncles of proximal spikes 1–13 cm, basal 2 peduncles 2–17 cm apart; of terminal spikes 1–12 cm, shorter than to somewhat exceeding the distal pistillate spike;

bracts leafy, sheath 1–9 cm;

blades 20–70 cm × 4–11 mm.

with 3–7 spikes;

peduncles of proximal spikes exserted (0.5–)1 cm;

proximal bracts with blades 12–80 mm, sheaths cylindric, 12–58 mm, mouth not purple-banded, 0.6–2 mm wide.

proximal pistillate spikes 2–6, the distal usually ± crowded, ascending, densely 8–90-flowered, usually cylindric, 2–8 × 1.5–3 cm;

terminal staminate spikes 1–2, 2–10 cm × 2–5 mm.

ascending to spreading, strongly 17–25-veined, sessile, lance-ovoid, 12–18.5 × 3.8–6 mm, shiny, glabrous;

beak conic, 6–9 mm.

ascending to spreading, green to purple, indistinctly or distinctly 9-20-veined, (3–)3.5–5.5 × 0.9–1.6(–1.8) mm, usually without flat margins around achene, usually glabrous, margins often ciliate-setose distally;

beak 0.5–1.5 mm, tip dark purple, often ciliate-setose, distance from perigynium beak tip to achene apex less than 2.5 mm.

stipitate, rhombic, concave faces, angles thickened, prominently knobbed with hard, nipplelike points, 3–4.5 × (2.2–)2.4–3.4 mm;

style same texture as achene.

± obovoid, 1.3–2 × 0.7–1.1 mm.

scales 3–9 veined, lanceolate, 6–13 × 1.8–3.2 mm, apex acute to awned, awn rough, to 5.5 mm.

scales red-brown to dark purple with paler midvein, ovate to obovate, 1.9–3.5 × 1–1.7 mm, apex acute or obtuse.

3, 3.5–7 mm.

(1.9–)2–3 mm.

spikes pistillate or androgynous, erect to pendent, purple or purple and brown, 12–32 × 5–10 mm;.

spike staminate, ± erect, 11–66 × 3–8 mm.

scales gold to purple brown with pale, 2.9–4.5 × 0.7–1.6 mm, midvein ciliate, margins scarious, apex obtuse.