Flora of North America species comparison

erect, not stiff, 15–90 cm.

20–104 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.

sheath white-hyaline, summits usually U-shaped, sometimes rounded and prolonged to 3 mm beyond collar;

distal ligules 1–3(–6) mm;

blades 3–5(–8) per fertile culm, 6–45 cm × 1.2–3(–3.7) mm.

2–15 cm × 5–10 mm;

proximal bracts shorter than to exceeding spikes;

distal bracts usually scalelike.

open or dense, green to brown, 1.1–3 cm × 5.4–16.3 mm, appearing fine-textured;

proximal internode (1.5–)2.5–9.5 mm; 2d internode 1–3(–6) mm;

proximal bracts scalelike or bristlelike shorter 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(–14), densely or loosely aggregated, broadly ovoid to ovoid, 5–11 × 2.7–7.1 mm, base rounded or acute, apex usually 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, green, straw colored to light brown, or whitish, conspicuously (0–)2–8(–11)-veined abaxially, conspicuously 0–6-veined adaxially, veins thick, reaching, not extending beyong top of achene, lance-ovate to ovate, plano-convex, 2.4–4(–4.3) × 0.9–1.9 mm, 0.4–0.5(–0.6) mm thick, 2.1–2.7 times as long as wide, margin flat, including wing 0.15–0.3(–0.45) mm wide, ciliate-serrulate at least on distal body;

beak green, gold, brown or white-hyaline at tip, flat, ± ciliate-serrulate or cylindric, unwinged, ± entire for 0.4–0.7 mm, abaxial suture usually 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.

elliptic to quadrate, 1–1.6 × 0.7–1.25 mm, (0.3–)0.4–0.5(–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 usually white-hyaline or hyaline gold, occasionally chestnut to dark brown, with pale to green midstripe, ovate to broad-ovate, 2.1–3.5(–3.9) mm, shorter than or ± covering perigynia, margin white, 0–0.2 mm wide, apex obtuse to acuminate.

= 56.

= 84.