Flora of North America species comparison

erect, not stiff, 15–90 cm.

with angles smooth proximally, 17–70 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 adaxially white-hyaline, often tinged brown distally, summit usually U-shaped, sometimes prolonged to 1.5 mm beyond collar;

distal ligules 0.5–1.5(–3) mm;

blades (2–)3–4 per fertile culm, 8–20 cm × 2.2–3.8 mm.

2–15 cm × 5–10 mm;

proximal bracts shorter than to exceeding spikes;

distal bracts usually scalelike.

dense, dark or chestnut brown or brown and green (gold), 1.2–2(–2.5) cm × 8–15 mm;

proximal internode 1–3(–4) mm; 2d internode 0.5–3 mm;

proximal bracts usually 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.

5–9(–12), densely aggregated, individually indistinct, ovoid or broadly ovoid, 7.5–11 × 3.5–6.5 mm, base rounded to attenuate, apex truncate to tapered.

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.

appressed-ascending to ascending, green to straw colored, conspicuously 6–8-veined abaxially, conspicuously 3–4(–6)-veined adaxially, at least 3 veins longer than achene, narrowly lanceolate to lanceolate, biconvex, 4–5.1 × 1–1.3(–1.5) mm, (0.4–)0.5–0.55 mm thick, margin flat, including wing 0.1–0.25 mm wide, ciliate-serrulate at least on distal body, pithlike tissue usually present in proximal perigynium walls;

beak usually dark brown at tip, cylindric, unwinged, ± entire for 0.5–0.9 mm, abaxial suture inconspicuous or with white margin, distance from beak tip to achene 2.2–3.1 mm.

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

narrowly elliptic to oblong, (1.1–)1.4–1.8 × 0.6–0.9 mm, 0.3–0.5 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 gold to brown, with pale to gold midstripe, lanceolate to ovate, 3.1–3.8 mm, shorter than and narrower than or as wide as perigynia, margin usually not white, apex obtuse to long-acute.

= 56.