Flora of North America species comparison

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

trigonous, angles obtuse, 4–35 cm, scabrous distally.

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;

sheath fronts with apex concave to V-shaped, glabrous;

blades 7–25 cm × 1.5–3 mm, shorter than culm.

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.

2–4 cm;

proximal bracts to 5 × 1 mm;

spikes crowded;

lateral spikes 0.5–1.5 cm × 4–5 mm;

terminal spikes 1–2 cm × 4 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.

yellow-brown, often red-brown at apex, sides convex, 2.5–2.8 × 1.5 mm, hairs purple-brown (hair-base bulbous);

beak red-brown, conic, thickened.

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

brown, sessile, mitrate, obovoid, 2–2.2 mm.

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.

2–3 mm.

brown with yellow-brown midrib, 3-veined, equaling perigynia, apex acuminate to retuse, with scabrous awn to 2 mm.

= 58, 62, 64, 66, 68 (Europe, Japan).