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 100 cm × 2 mm, scabrous.

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.

sheath fronts spotted red-brown or pale brown, apex short-convex, membranous or slightly thickened, rugose;

ligule retuse, to 0.5 mm, free limb to 0.1 mm;

blades 70 cm × 5 mm, tip not reaching inflorescence.

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.

spicate, 2.5–6 × 1.5 cm, with 10–15 branches, proximal scarcely separate; the proximal internode to 10 mm;

proximal bracts setaceous, not conspicuous, distal bracts scalelike.

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.

yellow-brown, red dotted, 3–5-veined abaxially, body broadly ovate, 2.5–5 × 2.5–3 mm, base rounded;

beak 0.8–1.2 mm.

substipitate, 2–2.5 × 1.7–1.8 mm.

red-brown, elliptic, 1.4–1.6 × 1.2 mm, dull.

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.

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

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

hyaline, brown, awn to 2 mm, usually shorter than scale body.

= 42.