Flora of North America species comparison

erect, not stiff, 15–90 cm.

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

sheaths pale brown abaxially, inner band thin, hyaline, sometimes slightly red tinged, concave at summit;

ligules slightly longer than wide;

blades pale green to gray-green flat, 10–20(–30) cm × (1.5–)2–4 mm, subequal to shorter than culms, not stiff.

basal;

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

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

2–15 cm × 5–10 mm;

proximal bracts shorter than to exceeding spikes;

distal bracts usually scalelike.

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.

4–8, gynecandrous, proximal ± remote, distal spikes approximate, sometimes flexuous, containing (5–)10–20(–30) perigynia suborbicular to oblong, 3–12 × 3–5 mm;

terminal spike staminate for less than 1/2 of length, often clavate due to more conspicuous staminate part.

appressed-ascending, gray-green, becoming yellowish brown, obscurely many-veined, elliptic-ovate, 1.8–3 × 1.2–1.7 mm, widest near middle, membranous;

beak abaxial suture inconspicuous, small marginal teeth.

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.

pale brown, oblong-obovate, 1.25–1.5 × 1–1.25 mm, dull to slightly glossy.

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

scales hyaline with green, 3-veined center when young, usually brownish tinged in age, broadly ovate, subequal to, not concealing perigynia, apex obtuse to acutish.

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

2–3 mm.

= 56.

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