Flora of North America species comparison

20–90 cm;

vegetative culms inconspicuous with few leaves clustered at apex.

(10–)30–40(–60) cm, smooth.

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.

3–5 mm wide.

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 shorter than or exceeding inflorescences;

spikes overlapping, erect or proximal spikes sometimes spreading, distinct, contiguous, short-pendunculate, short-oblong or elongate, 10–25 × 6–10 mm;

lateral 2–4(–6) spikes pistillate, pedunculate, of similar length;

terminal spike gynecandrous.

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.

ascending, golden or dark brown, veinless, ovate, 3–4 × 1.5–1.75 mm, apex abruptly beaked, distally papillose;

beak 04–0.5 mm, bidentate, smooth.

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

filling proximal 1/2 or less of perigynia.

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 dark brown or black to margins, lanceolate, longer than and as broad as perigynia, midvein same color as body, inconspicuous or lighter in color and conspicuous, acute.

= 68, 70.

= 54.