Flora of North America species comparison

20–75 cm, glabrescent.

25–95 cm;

vegetative culms numerous, conspicuous, with 15–35 leaves, 3-ranked.

sheaths sparsely pilose, but usually densely pilose at mouth;

ligules shorter than wide;

blades 1.5–4 mm wide, glabrescent, or often persistently pilose proximally.

sheaths with adaxial hyaline band, summits U-shaped, prolonged 0.4–1.6 mm beyond collar;

distal ligules 2–3.5 mm;

blades 4–7 per fertile culm, pleated, ± auriculate at collar, 9–20 cm × 1–2.7 mm.

lateral spikes approximate or proximal distant, 6–15 × 4–5 mm;

terminal spike gynecandrous, at least 1/2 of flowers pistillate, 14–25 mm.

open or dense, light green to light brown, 1.3–4 cm × 8–12 mm;

proximal internode 2–9 mm; 2d internode 2–5 mm;

proximal bracts scalelike or with bristle tips to 3.7 cm.

2–4(–6), distant, distinct, clavate-ovoid, 6–18 × 6–12 mm, base attenuate on terminal spike, truncate on lateral spikes, apex rounded.

ascending, 5–18-veined, obovate-circular, ± trigonous in cross section, 2–3.5 × 1.1–2.1 mm, not papillose, glabrous or sparsely pilose;

beak absent.

widely spreading, green to pale brown, conspicuously 5–10-veined abaxially, conspicuously 3–7-veined adaxially, elliptic to nearly orbiculate, plano-convex to biconvex, (4–)4.5–6.6 × 2.2–3.5 mm, 0.6 mm thick, sometimes finely papillose, margin flat, including wing 0.8–1.3 mm wide;

beak white or pale brown at tip, flat, ciliate-serrulate, abaxial suture usually inconspicuous, distance from beak tip to achene 2–3 mm.

1.6–2.3 × 0.9–1.5 mm.

narrowly oblong-lanceolate, 1.8–2.6 × 0.9–1.2 mm, 0.6 mm thick.

scales ovate, 1.9–3(–3.5) × (0.8–)0.9–1.5(–1.7) mm, shorter than to equaling perigynia, apex acute to acuminate, sometimes with awn to 0.5 mm.

scales silvery white to pale brown, narrow green to brown midstripe, narrowly ovate, 2.3–3.8 mm, as long as and narrower than perigynia, apex obtuse to acute.

scales oblong-obovate, 2.7–5.3 mm, apex acuminate or short-awned.

1.5–2.2 mm.

= 74.