Flora of North America species comparison

(35–)40–110 cm;

vegetative culms few, inconspicuous, with 6–8 leaves, not strikingly 3-ranked.

erect, relatively strict, 15–40 cm.

sheaths adaxially white-hyaline, summits concave or truncate, prolonged beyond collar to 2.5 mm, papillose at least near apex;

distal ligules 1–5 mm;

blades 3–4 per fertile culm, 2.5–25 cm × 2–5 mm, usually adaxially papillose.

sheaths relatively tight, pale brown abaxially, inner band thin, hyaline, concave at summit;

ligules as wide as long;

blades pale green to gray-green, flat, 10–20 cm × 1–2 mm, subequal to or shorter than culms, papillose, densely so abaxially.

open, pale brown, 0.24–0.62 cm × 8–15 mm;

proximal internode 5–17 mm; 2d internode 3–10 mm;

proximal bracts scalelike, with bristle tips shorter than inflorescences.

1.5–4 cm × 4–5 mm;

proximal bracts shorter than to exceeding spikes, distal bracts usually scalelike.

3–6(–8), distant, distinct, ovoid to clavate, 7–21 × 5.5–12 mm, base rounded to long tapered, apex rounded.

3–6(–7), gynecandrous, proximal sometimes remote, distal approximate, containing 10–20 perigynia, suborbicular to ovoid, 3–7 × 3–5 mm;

terminal spike staminate for 1/2 length, not or scarely clavate.

15–80 in larger spikes, ascending or ascending-spreading, green to pale whitish green with reddish brown margin, conspicuously 8–12-veined abaxially, 4–8-veined adaxially, broadly elliptic to nearly orbiculate, (4.5–)5.1–6.7(–7.1) × (2.4–)2.8–4.2 mm, 0.5–0.7 mm thick, membranaceous with brown achene visible through hyaline adaxial face, margin flat, including wing 0.8–1.2 mm wide, often erose, scalloped, or with an irregular tooth, smooth;

beak pale brown at tip, flat, ciliate-serrulate, abaxial suture inconspicuous, distance from beak tip to achene 2.4–3.7 mm.

appressed-ascending, gray-green, becoming pale brown in age, obscurely many-veined on both faces, elliptic-ovate, 1.8–2.1 × 1–1.3 mm, widest near middle, membranous;

beak short, entire.

elliptic to oblong, 1.6–2.2 × 1.1–1.6 mm, 0.5 mm thick.

yellowish brown, oblong-obovate, 1.25 × 1 mm, dull to slightly glossy.

scales reddish brown with green midstripe, lance-ovate to ovate, 3.1–5.4 mm, 1.9–3.2 times as long as wide, (1–)1.4–2.3 mm shorter than perigynia, narrower than perignyia, apex obtuse to acute.

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.

(2.4–)2.8–4.2 mm.

scales obtuse.

= 76, 78.

= 56.