Flora of North America species comparison

(35–)40–110 cm;

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

erect, slender, 15–80 cm, very rough distally.

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 pale to gray-brown abaxially, inner band thin, hyaline, conspicuously purplish dotted, concave at summit;

ligules acute, longer than wide;

blades pale to gray-green, flat, 15–50 cm × 2–4 mm, shorter than to exceeding culms.

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.

erect, ovoid-oblong, 1.5–4 cm × 7–12 mm;

proximal bracts (sometimes also 2d) bristlelike-prolonged, from short to clearly 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.

5–15, gynecandrous, proximal often slightly separate, distal closely approximate (sometimes hardly recognizable), containing 10–20 perigynia, sessile, oblong, 5–10 × 4–6 mm.

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.

spreading-ascending, greenish, often brown in age, several-veined, ovate, widest near base, 2–3(–3.5) × 1.25–1.5 mm, minutely papillose (membranous);

beak abaxial suture conspicuous, 0.75–1.25 mm, margin serrulate.

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

pale brown, ovate, 1.25–1.5 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 center, often brown tinged, ovate, shorter than perigynia, apex obtuse to short-cuspidate.

(2.4–)2.8–4.2 mm.

scales obtuse.

= 76, 78.

= 60.