Flora of North America species comparison

acutely angled, 50–150 cm, scabrous.

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

basal sheaths red-brown;

sheaths of proximal leaves bladeless, scabrous, fronts with red-brown spots, prominently ladder-fibrillose, apex red-brown, U-shaped, occasionally thickened;

blades 4–6 mm wide.

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.

proximal bract shorter than or subequal to inflorescence, 3–4.5 mm wide.

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 2(–3); pistillate 3–4;

proximal pistillate spike 1.6–10.8 cm × 3–5 mm, base cuneate or attenuate.

ascending, pale brown, occasionally with red-brown spots on apical 1/2, 0–5-veined on each face, somewhat flattened, loosely enclosing achenes, ovoid, 1.7–3.4 × 0.8–1.8 mm, dull, apex acute or obtuse, papillose;

beak thickened, 0.1–0.2 mm.

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.

not constricted, dull.

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

scales red-brown, shorter than perigynia, apex acute, awnless.

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.

= 66, 68.