Flora of North America species comparison

erect, not stiff, 15–90 cm.

often lax, supported by other vegetation, 27–105 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 white-hyaline or green-veined with central white-hyaline strip, summits U-shaped to rounded, sometimes prolonged beyond collar;

distal ligules 1.5–5.5 mm;

blades 3–6 per fertile culm, 12–65 cm × 1.3–3.7(–4.6) mm.

2–15 cm × 5–10 mm;

proximal bracts shorter than to exceeding spikes;

distal bracts usually scalelike.

dense to open, green and brown, gold and brown, or brown, 1.3–3.5 cm × 7–23 mm;

proximal internode 2–3(–4.5) mm; 2d internode 1–3 mm;

proximal bracts bristlelike or rarely leaflike, longer than inflorescences.

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.

4–11, densely aggregated, at least proximal 1–3 distinct, ovoid to broadly ovoid, 6–12.3 × 3.8–9.1 mm;

base rounded;

apex acute to 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, straw colored or gold to coppery, conspicuously (0–)5–9-veined abaxially, conspicuously 0–6-veined adaxially, veins not reaching top of achene, ovate to broadly ovate, plano-convex to biconvex, (2.9–)3.5–4.7(–5.7) × 1.2–1.7(–2.2) mm, 0.5–0.75 mm thick, ± leathery, margin flat, including wing 0.2–0.4 mm wide, ciliate-serrulate at least on distal body, with metallic sheen;

beak often brown to dark brown at tip or white-hyaline, cylindric, unwinged, abaxial suture inconspicuous, distance from beak tip to achene 1.5–2.2(–2.6) mm, ± entire for (0.3–) 0.4–0.8 mm.

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

broadly ovate to quadrate, 1.3–2.1 × 1–1.5(–1.7) mm, 0.5–0.6 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 brown, red-brown, or coppery, with whitish, green, or pale brown midstripe, ovate, (3.2–)3.5–4.5 mm, shorter, narrower than, or covering perigynia, margin often indistinct, white, 0–0.4 mm wide, apex ± obtuse or rarely short-awned.

= 56.