Flora of North America species comparison

erect, not stiff, 15–90 cm.

30–100 cm.

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.

sheaths papillose, summits U-shaped;

distal ligules 3.5–5 mm;

blades 4–5 per fertile culm, green, without auricles, 17–37 cm × 2–5 mm, pliable.

2–15 cm × 5–10 mm;

proximal bracts shorter than to exceeding spikes;

distal bracts usually scalelike.

arching or nodding from proximal spike, open at least proximally, silvery greenish yellow, 2.5–6.5 cm × 7–17 mm;

proximal internode 7–18 mm; 2d internode 3–10 mm; often aristate or long-aristate;

proximal bracts scalelike.

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.

(3–)7–15, widely spaced except the distal densely aggregated, proximal 1 often stalked, nearly globose or ovoid, 6–17 × 4.5–7 mm, base clavate or attenuate, apex rounded.

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.

ascending to spreading, uniformly pale green to straw colored, conspicuously, evenly (4–)5–8(–10)-veined on each face, ovate to obovate, plano-convex, 3–4.5 × 1.9–2.3 mm, 0.6 mm thick, usually widest at 2/5–1/2 total length, margin flat, including wing 0.2–0.6 mm wide, finely granular-papillose;

beak whitish at tip, flat, ciliate-serrulate to within 0.3 mm of tip, abaxial suture inconspicuous, distance from beak tip to achene 1.2–2 mm.

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

oblong-ovate, 1.5–1.75 × 1–1.2 mm, 1.4–1.6 times as long as wide, 0.5 mm thick.

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.

scales silvery pale green with pale or green midstripe, lance-subulate, (3.2–)3.5–4.1(–4.6) mm, shorter and narrower than or equaling perigynia, margin white-hyaline, to 0.6 mm wide, apex acute.

= 56.

= 80.