Flora of North America species comparison

20–90 cm, 1.5–3 mm wide basally, 0.9–1.1 mm wide distally.

straight, 10–50 cm, tallest ones 25–50 cm.

sheaths tight, green, fronts hyaline, yellowish and thickened at mouth;

ligules to 3 mm, as long as wide;

widest leaf blades 2.5–4.5 mm wide, sometimes papillose adaxially.

of flowering stems usually shorter than culms, 5–20 cm × 1.5–2.9 mm;

ligules on distal cauline leaves truncate or rounded.

with (3–)5–10 spikes, 1.5–3.5 cm × 8–15 mm;

proximal internodes equaling or shorter than proximal spikes;

proximal bracts 1–5 cm;

spikes with 8–20 ascending or spreading perigynia.

peduncles of terminal staminate spikes 0.5–8 mm, 0.2–0.5 length of staminate spikes;

bracts to 20 cm × 1.1–2.9 mm, 1.5–4 times as long as inflorescences;

inner band of sheaths concave or truncate.

proximal pistillate spikes (1–)2–5, approximate, subsessile or short-pedunculate, globose to elliptic, 8.5–19.9 × 4.1–9.8 mm;

terminal staminate spikes pedunculate, 12–21 × 1.3–2.7 mm.

pale green, pale yellow, or pale brown, 9–15-veined abaxially, 3.5–5 × 2.2–3 mm, margins serrulate distally;

beak 0.8–1.2 mm, apical teeth 0.4–0.6 mm.

reflexed, yellowish green, 3.5–4.8 × 1.1–1.7 mm, apex gradually narrowed;

beak 1.4–2.5 mm, forming an angle of 13–48° with body, smooth.

suborbiculate, 1.9–2.5 × 1.5–2 mm.

1.2–1.5 × 1–1.2 mm.

scales hyaline or brown with green, 3-veined center, ovate, (2.4–)3–4.3 × (1–)1.6–3 mm, body slightly shorter to longer than perigynium and as wide, apex awned to 1.5–3.5(–4) mm.

2.2–2.5 mm.

1.1–2.9 mm.

pistillate scales yellowish green, inconspicuous among perigynia, 1.7–2.6 × 0.8–1.2 mm; staminate scales yellowish green, ovate, 2.9–4.4 × 0.8–1.6 mm, apex obtuse or acute to acuminate.

= 64.