Flora of North America species comparison

(35–)40–110 cm;

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

densely tufted, slightly winged, 9.2–56 cm × 0.8–1.1 mm.

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.

basal sheaths brown or light brown;

sheaths 1–40 mm;

blades erect, ascending, or lax, dark green, midrib well developed abaxially, margins serrulate distally, 6.2–17 × 2.8–32 cm, blades of overwintering leaves smooth Inflorescences: peduncles of lateral spikes absent; of terminal spike 1.3–7.3(–15) mm.

2–4, blade 1.2–21 cm × 2.6–11 mm, widest bract blade per plant 5.3–11 mm wide;

bract blade of distal lateral spikes lanceolate or narrowly lanceolate, wider than spikes, wides bract blade of distalmost lateral spike (2.9–)3.2–8.3 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.

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

4–5 per culm, lateral spikes 5.3–18(–23) × 3.7–4.6 mm, distal 2–3 spikes overlapping and concealed by bracts;

terminal spike linear, 5.8–13(–18) × 0.9–2.1 mm wide, proximal to or overtoppped by distal 2 bracts, usually exceeded by or, sometimes, subequal to distalmost lateral spike.

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.

3–8(–14) per spike, spirally overlapping, aggregated, 29–34-veined, ovate or oblong, faces flat or slightly convex, 2.7–4.2(–5) × 1.3–1.7(–1.8) mm, base abruptly contracted to 0.1–0.2 mm stipe;

beak excurved 30–45° from long axis of perigynium, 0.2–0.6(–1) mm wide.

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

1.9–2.5(–2.9) × 1.2–1.6(–1.7).

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 1.1–4.2 × 1.4–1.8 mm;

body ovate, 1.1–2.2, margins usually whitish, apex acute and awnless or awned, awn 0–2.2 mm.

(2.4–)2.8–4.2 mm.

1.8–2.3 mm.

scales obtuse.

scales 1.9–3.8 × 0.8–1.5 mm, apex obtuse or acute, awnless.

= 76, 78.