Flora of North America species comparison

20–90 cm;

vegetative culms inconspicuous with few leaves clustered at apex.

15–45 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.

sheaths adaxially white-hyaline, summits usually U-shaped;

distal ligules 0.8–1.5 mm;

blades 3–5 per fertile culm, occasionally folded, if not folded, margins revolute, 5–10 cm × 1.5–2.5(–3) mm, thick, tough.

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.

dense to ± open, whitish, gold, or brown, (1.5–)2–3(–3.7) cm × 6–12 mm;

proximal internode 4–11 mm; 2d internode 2.5–7 mm;

proximal bracts scalelike or bristlelike, shorter than inflorescences.

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

4–6, distant, distinct, lanceloid to ovoid, 10–15 × 4–6 mm, base tapered to attenuate, apex rounded to acute.

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.

appressed or appressed-ascending, green, gold, or coppery, conspicuously 7–14-veined abaxially, conspicuously 3–8-veined adaxially, lanceolate or ovate to oblanceolate or obovate, plano-convex, (3.7–)4.5–6 × 1.5–2.6 mm, 0.5–0.7(–0.9) mm thick, margin flat, including wing 0.2–0.4(–0.5) mm wide;

beak brown to gold or reddish, often white-hyaline at tip, ± cylindric, ± ciliate-serrulate for distal 0.2–0.7 mm, abaxial suture with white margin, or sometimes inconspicuous, distance from beak tip to achene (0.6–)1–2 mm.

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

lanceolate to ovate or obovate, 1.9–2.4 × 1.2–1.6 mm, 0.5–0.7 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 red-brown, with straw colored to tan midstripe, usually ovate, to 4–5 mm, equaling, covering at least perigynium bodies, margin white, 0.2–0.6 mm wide, apex obtuse to short-awned.

= 68, 70.