Flora of North America species comparison

20–90 cm;

vegetative culms inconspicuous with few leaves clustered at apex.

up to 12 cm, scabrous.

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 V-shaped in cross section when young, (0.5–) 1.2–2 mm wide, papillose, scabrous.

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 usually with sheath 2.5–3 mm;

lateral spikes usually 1–2 distal, 2–3 basal, 3–7 × 4 mm;

terminal spike staminate or gynecandrous, 7–8 × 1.5–2 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.

15–27-veined, most veins on faces 0.1 mm wide or wider, about as wide as marginal veins, obovoid, 3–4 × (1.1–)1.4–1.9(–2.1) mm, glabrous proximally, hispidulous distally;

beak distinct, abruptly bent, 0.1–0.5 mm.

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

sessile, with 2 faces convex, 2–2.4 × (1.1–)1.4–1.9 mm, apex retuse.

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 3–5(–10)-veined, obovate, 3.5–4.2 × 1.3–2 mm, proximal ones longer than perigynia, apex subobtuse to acuminate and often mucronate.

scales 5-veined or more, 4–5 × 1.5–2.1 mm.

= 68, 70.