Flora of North America species comparison

(20–)30–100 cm, 2.5–8 mm wide basally, 0.7–1.6 mm wide distally.

straight, 10–75 cm.

sheaths usually loose, proximally green-and-white-striped, not white spotted, with conspicuous transverse veins on back, fronts hyaline, sometimes transversely rugose and red dotted, thin, white or hyaline and fragile at mouth;

ligules 2–7 mm, shorter to longer than wide;

widest leaf blades (3–)4–8 mm wide.

of flowering stems shorter than to slightly exceeding culms, 5–30 cm × 1.6–4.7(–5.8) mm;

ligules on distal cauline leaves truncate or rounded.

with 5–15 spikes, 1–5 cm × 8–15 mm, occasionally compound, then somewhat larger;

proximal bracts to 3 cm;

spikes with 5–15 ascending to spreading perigynia;

proximal internodes shorter than to 1.5 times as long as proximal spikes.

peduncles of terminal spikes 0.4–5(–9) mm;

bracts to 18.5 cm × (0.7–)2–4.5 mm;

inner band of sheaths truncate or concave.

proximal pistillate spikes (1–)2–5, contiguous or approximate, globose to elliptic, 8–22 × 7.5–12.7 mm;

terminal staminate spikes sessile or pedunculate, 9–22 × 1.1–3 mm.

pale green to pale brown, veinless or 3–7(–12)-veined abaxially, rarely veined adaxially, 3.5–5.5 × 2–3 mm, body somewhat spongy, base thickened, margins serrulate distally;

beak 0.6–1.6 mm, apical teeth 0.3–1 mm.

reflexed, bright yellow at maturity, 4–6.3 × 1–1.9 mm, apex gradually narrowed;

beak 1.3–2.7 mm, forming angle of (15–)26–72° with body, scabrous.

circular to elliptic- circular, 1.8–2.1 × 1.6–2 mm.

1.3–1.7 × 0.9–1.2 mm.

scales hyaline or brown with green, 1–3-veined center, ovate, 2.6–4.4 × 1.3–2.4 mm, body shorter to slightly longer than perigynium, apex acuminate to short-awned.

1.5–3 mm.

1–2.1 mm.

pistillate scales reddish brown, 2.3–3.9 × 0.9–1.4 mm; staminate scales reddish brown, ovate, margins narrowly whitish hyaline, apex obtuse.

= 60.