Flora of North America species comparison

30–100 cm, 3–6 mm wide basally, 0.7–1.1 mm wide distally.

25–90 cm, 1.6–2 mm wide basally, 0.6–0.7 mm wide distally.

proximal sheaths loose, longitudinally green-and-white-striped, green-and-white-mottled, with prominent cross veins on backs, fronts hyaline and transversely rugose;

ligules 3–8 mm, as long as wide;

widest leaf blades 5–10 mm wide.

sheaths tight, green, fronts hyaline;

ligules less than 2 mm, as long as wide;

widest leaf blades 1.5–2.5(–3) mm wide.

with 6–15 spikes, 3–15 cm × 8–12 mm, occasionally compound and then somewhat larger;

proximal internodes usually 20+ mm, more than 2 times as long as proximal spikes;

proximal bracts to 2 cm;

spikes with up to 50 ascending to spreading perigynia.

with 4–10 spikes, 1.5–3.5 cm × 6–10 mm;

proximal internodes as long as to slightly longer than proximal spikes, rarely 2 times as long;

proximal bracts to 3 cm;

spikes with 3–10 ascending to spreading perigynia.

pale green, with wing 0.1–0.2 mm wide distally, veinless or weakly veined abaxially, 3.3–4.3 × 1.5–2.5 mm, margins serrulate distally;

beak 0.8–1.2 mm, apical teeth 0.2–0.4 mm.

brown, sometimes with green margins, faces obscurely veined, 2.5–4.5 × 1.5–1.9 mm, base of body somewhat spongy, margins serrulate distally;

beak 0.6–1.3 mm, apical teeth 0.2–0.3 mm.

suborbiculate, 1.7–2.2 × 1.5–1.8 mm.

elliptic-circular, 1.9–2 × 1.5–1.6 mm.

scales hyaline with green midvein, ovate to subcircular, 1.8–2.5 × 1.1–1.8 mm, body 1/2 length of perigynium, apex obtuse to acuminate or short-awned.

scales brown with green, 3-veined center, ovate, 3.4–4 × 1.6–2 mm, body wider than and as long as perigynium, apex acuminate to short-awned, awn less than 1 mm.

0.7–1.3 mm.

2.5 mm.

straight, 0.07 mm wide.

= 46, 48.