Flora of North America species comparison

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

obtusely angled, 6–35 cm, glabrous.

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.

basal sheaths brown;

sheaths of proximal leaves glabrous, fronts lacking spots and veins, apex U-shaped;

blades amphistomic, 2–3 mm wide, papillose on both surfaces.

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.

erect; staminate 1–2; pistillate 2–4;

proximal pistillate spike 1–3.1 cm × 2–5 mm, base cuneate.

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.

ascending, pale brown, incompletely 0–3-veined on each face, somewhat inflated, loosely enclosing achenes, ellipsoid, (2–)2.5–3.3 × 1.2–1.9 mm, dull, base with stipe to 0.2 mm, apex acute, short-papillose;

beak cylindric to conic, 0.2–0.4 × 0.3–0.4 mm.

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

deeply constricted on 1 face, apex truncate to retuse, glossy;

style base bent, rarely straight.

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.

scales brown, 2.5–8 × 1–1.7 mm (including awn), wider than perigynia, midvein reaching apex, 1/3–1/2 the width of scale, apex acute or acuminate, often aristate, awn glabrous or scabrous.

1.5–2.5 mm.

bract longer than inflorescence, 1.5–4 mm wide.

= 77, 78, 79.