Flora of North America species comparison

20–90 cm;

vegetative culms inconspicuous with few leaves clustered at apex.

usually aphyllopodic, without dead leaf remains at base, 20–60 cm.

sheaths white-hyaline or green-veined, sometimes papillose, summits U-shaped, not distally expanded;

distal ligules 2.2–6 mm;

blades 3–4 per fertile culm, 11–25 cm × 1.7–4.2 mm.

blades 1–2.5 mm wide, margins involute, scabrid.

mostly dense, brown, 1.1–3 cm × 5–14 mm;

proximal internode 1–4 mm; 2d internode 1.4–3.4 mm;

proximal bracts scalelike, with bristle tips shorter than inflorescences.

proximal bracts 2–6 cm, shorter than inflorescences;

lateral spikes sometimes androgynous, 6–20 × 4–8 mm, with 8–30 perigynia;

terminal spikes 7–35 × 1.5–2.5(–3) mm.

3–10, usually overlapping, ovoid to globose, 4–10 × 3–7 mm, base rounded or truncate, apex rounded.

ascending to ascending-spreading, light to dark reddish brown, conspicuously 3+-veined abaxially, faintly or basally 1–3-veined adaxially, winged to base, ovate or elliptic, plano-convex, 2.5–3.8 × (1–)1.2–2 mm, 0.35–0.45 mm thick, 1.9–2.5 times as long as wide, margin flat, including wing 0.2–0.5 mm wide, 1b ciliate-serrulate at least distally;

beak reddish brown at tip, flat, ± ciliate-serrulate, abaxial suture with reddish brown-hyaline margin, distance from beak tip to achene 1.2–2.2 mm.

2.5–4 × 1.8–2.6 mm, apex rounded;

beak 0.1–0.5 mm.

ovate or elliptic, 1–1.3 × 0.6–0.9 mm, 0.3–0.4 mm thick.

scales reddish brown, usually with green or whitish to brown midstripe, lanceolate, 2.5–3.5 mm, shorter and narrower than perigynia, apex acuminate or acute.

scales ovate to ovate-circular, 3–5.5 × 2–3.4 mm, wider and as long as or slightly longer than perigynia, apex obtuse to subacute, sometimes mucronate.

scales obovate, 3–4.5 × 1.4–1.6 mm, apex obtuse, sometimes mucronate.

2–3 mm.

= 68, 70.