Flora of North America species comparison

in medium- to large-sized clumps, 30–90 cm.

(20–)30–100 cm, 1.5–3.5 mm wide basally, 0.7–1.2 mm wide distally.

cauline, usually overtopping culms;

blades 10–40(–50) cm × 4–9 mm.

sheaths usually loose, proximal green-and-white-striped and green-and-white-mottled, with conspicous transverse veins on back, fronts white to hyaline, sometimes red dotted and transversely rugose, yellow or brown and thickened at mouth;

ligules 1–4.5 mm, shorter than to as long as wide;

widest leaf blades 3.5–5 mm wide.

with proximal spikes ± strongly separate on slender peduncles, others approximate and short-pedunculate or subsessile, narrowly oblong to cylindric, 1–4 cm × 3.5–5.6 mm;

lateral spikes, if gynecandrous, with ca. 30–140 pistillate flowers distally and (0–)1–10 staminate flowers proximally;

terminal spikes staminate proximally, 1/2–3/4 pistillate distally.

with 5–10 spikes, (1.5–)2–5 cm × 8–13 mm;

proximal internodes shorter than to as long as proximal spikes;

proximal bracts to 3 cm;

spikes with 5–15 ascending to spreading perigynia.

olive green to brown, very broadly compressed-obovoid, sharply edged, 2–2.6 × 1.8–2.4 mm;

beak often projecting out at 90° angle.

pale green to pale brown, veinless or weakly 2–5-veined abaxially, 3.4–4.6 × 1.9–2.8 mm, body somewhat spongy, thickened at base, margins serrulate distally;

beak 0.7–1.4 mm, apical teeth 0.3–1 mm.

widely oblong-obovoid, 1.5–1.8 × 1–1.3 mm, apex short-apiculate.

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

scales ovate, 1.5–3.2 mm, mostly not quite as long as perigynia.

scales hyaline or pale brown with green, 1–3-veined center, ovate, 2.2–3.5 × 1.2–1.8 mm, body 2/3 as long to almost length of perigynia, apex acuminate to short-awned.

1.5–2.5 mm.