Flora of North America species comparison

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

acutely angled, 20–90 cm, scabrous.

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, 3–12 mm wide, glabrous.

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.

proximal bract subequal to inflorescence, 3–7.5 mm wide.

erect; staminate 1–3; pistillate 2–4;

proximal pistillate spike 3–5.5 cm × 5–8 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.

divergent, brown with red-brown spots on apical 1/2, 5–9-veined on each face, somewhat inflated, loosely enclosing achenes, ellipsoid or obovoid, 2.6–4 × 1.6–2.5 mm, leathery, dull, apex rounded or obtuse, glabrous;

beak brown, 0.3–0.6 mm, leathery, bidentate, teeth to 0.5 mm.

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

not constricted, dull.

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 red-brown, longer than perigynia, apex acute, awned, awn to 0.5 mm.

1.5–2.5 mm.

= 66, 68.