Flora of North America species comparison

brown at base, densely covered with brown fibrillose remains of previous year’s leaves; flowering stems 30–90 cm, longer than leaves at maturity, 0.5–0.7 mm thick, glabrous but finely scabrous within inflorescence.

to 80 cm.

sheaths glabrous, basal ones tinged with brown and all bearing blades, green to hyaline on back, white-hyaline on front;

blades flat, 2.5–4 mm wide, finely scabrous on adaxial surface and margins, glabrous on abaxial surface.

blades 3–8 mm wide.

peduncles of lateral spikes slender, 20–60 mm, equaling or somewhat longer than spikes, finely scabrous;

peduncle of terminal spike 5–15 mm, scabrous;

proximal bracts equaling inflorescences or more often shorter;

sheaths 3–5 mm or rarely longer;

blades 1–1.5 mm wide.

with 3–5 spikes;

peduncles of proximal spikes exserted more than 1 cm;

proximal bracts with blade (10–) 15–50 mm, sheaths cylindric to ± expanded to mouth, 20–37 mm, mouth with narrow, ± purple band at top, usually Y- or V-shaped, mouth 0.7–1.8 mm wide.

shiny tan to golden green, 2-ribbed, but otherwise veinless, closely enveloping achene at maturity, ovoid-ellipsoid, 4.5–6.5 × 1.5–2 mm, membranous, base acute, apex abruptly contracted to beak, glabrous;

beak bidentate, narrowly tubular, nearly as long as body, finely scabrous on edge, teeth hyaline, 1 mm.

ascending, usually purple or red-brown, veins usually indistinct, ovate to elliptic, 3.2–5.5 × 0.9–1.7(–2) mm, margins flat, less than 1/2 mature achene width, margins setose-ciliate distally, usually at least sparsely hispidulous to shortly setose;

beak ± distinct, apex brown to purple, setose-ciliate, distance from beak tip to achene apex usually more than 2 mm.

substipitate, 2–2.5 × 1.7–1.8 mm.

obovoid, body 1.5–2 × 0.8–1 mm.

spikes 4–5, 1 per node;

proximal spikes well separated, nodding or drooping at maturity, pistillate with 10–40 perigynia about 1 mm apart, cylindric, 10–35 × 8–10 mm;

distal spikes crowded near apex, sessile or nearly so, staminate or androgynous, linear, less than 20 mm.

spikes pistillate or often androgynous, purple to brown, proximal spikes pendent to erect, 14–25 × 4–7 mm.

spike staminate or rarely with a few perigynia at base, 10–20 × 1.5–2 mm.

spike staminate or androgynous, ± erect, 10–21 × 4.5–6 mm.

scales pale hyaline tinged with chestnut, narrow midrib green, sometimes finely scabrous, ovate-oblong, shorter than mature perigynia, apex long-acuminate, glabrous.

scales purple or brown with pale, usually indistinctly veined, ovate to elliptic, 2.3–3.8 × 0.8–1.7 mm, midvein and margins ciliate, apex obtuse to short-awned.

scales purple or reddish brown with pale midvein, ovate to obovate, 3–4.4 × 1–1.4 mm, margins slightly ciliate, apex obtuse.

1.5–3 mm.

= 42.