Flora of North America species comparison

(35–)40–110 cm;

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

20–90 cm, (1.5–) 1.6–2.2 mm wide basally, 0.5–0.9 mm wide 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 tight, green, fronts hyaline;

ligules less than 2 mm, wider than long;

widest leaf blades 1.8–2.6 mm wide.

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.

2–7 cm × 5–8 mm;

proximal internodes more than 2 times as long as proximal spikes;

proximal bracts to 6(–10) cm;

spikes with 7–14 spreading perigynia;

spikes 4–8.

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

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.

green, faces not veined, 2.6–4(–4.2) × 1.1–1.8 mm, base of body spongy, thickened, longitudinally striate adaxially, spongy region 0.8–1.3 mm, margins serrulate distally;

beak 0.6–1.2 mm, apical teeth 0.1–0.5 mm.

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

ovate to obovate, 1.6–2.2 × 1.1–1.6 mm.

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 midvein, ovate to circular-ovate, 1.4–2.1 × 1–1.8 mm, body 1/2 length of perigynium, apex obtuse, acute, or awned.

(2.4–)2.8–4.2 mm.

0.8–1.3 mm.

scales obtuse.

coiled or twisted, 0.07–0.1 mm wide.

= 76, 78.

= 52.