Flora of North America species comparison

20–90 cm;

vegetative culms inconspicuous with few leaves clustered at apex.

30–85 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 U-shaped, prolonged more than 2.8 mm;

distal ligules 2–5 mm;

blades (2–)3–4 per fertile culm, 10–30(–40) cm × 2–4(–5) mm.

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.

open, stiffly erect, green, gold, or pale brown, (2–)2.5–4.5(–6) cm × 9–16 mm;

proximal internode 4.5–9 mm; 2d internode (2–)5–9(–11) mm;

proximal bracts scalelike, awn shorter than inflorescences.

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

(3–)4–7, distant, distinct, fusiform, ovoid, or obovoid, 15–27 × 5.5–9 mm, base tapered to attenuate, apex acute or 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.

appressed to ascending, whitish green to brown, conspicuously 10–19-veined abaxially, conspicuously 4–10-veined adaxially, at least 3 adaxially veins longer than achene, lanceolate to ovate, plano-convex, 6–8 × 1.7–2.4 mm, 0.5–0.9 mm thick, margin flat, including wing (0.2–)0.3–0.5 mm wide, ciliate-serrulate at least distally;

beak green, red-brown, brown, or gold, white-hyaline at tip, cylindric, unwinged, ± entire to 1 mm or flat, ± ciliate-serrulate, abaxial suture with conspicuous white margin, distance from beak tip to achene (2.8–)3.2–4.6 mm.

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

elliptic to ovate-elliptic, 2.2–3 × (1.1–)1.3–1.8 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 whitish green or gold, with greenish to gold midstripe, lanceolate or ovate, 5.8–7.6 mm, ± equaling perigynia, concealing beaks, margin white, 0.2–0.7 mm wide, apex acute to acuminate.

scales with white-hyaline margin (0.2–)0.3–0.7 mm wide.

= 68, 70.