Flora of North America species comparison

15–38 cm.

23–37 cm.

sheath summits white-hyaline, green ribbed, U-shaped, occasionally prolonged to 4 mm distal to collar;

distal ligules 1–3(–3.5) mm;

blades 2–4 per fertile culm, 4.5–18 cm × 1.5–2.5 mm.

sheaths adaxially white-hyaline, summits U-shaped or rounded;

distal ligules 1–2.5 mm;

blades 2–4 per fertile culm, 7–13 cm × (1.5–)2–3 mm.

nodding, dense, dark or medium brown, 1–1.2 cm × 5.5–10 mm;

proximal internode 1.3–3 mm; 2d internode 0.6–1.5 mm;

proximal bracts scalelike to bristlelike.

open, brown or orange-brown, (1–)1.8–3 cm × 6–11 mm;

proximal internode 4.5–9 mm; 2d internode, when present, 2–7 mm;

proximal bracts scalelike or tipped with stout awn or bristle, shorter than inflorescences.

3–6, usually individually indistinct, ovoid to broadly ovoid, 4.5–6.5 × 2.5–5.5 mm, base and apex acute to rounded;

terminal spike without conspicuous staminate base.

(1–)2–3, distant, distinct, narrowly oblanceloid to oblanceloid, (12–)14–22 × 5.5–7 mm, base attenuate, apex acute to rounded.

ascending-spreading to spreading, gold to dark brown, conspicuously 0–7-veined abaxially, conspicuously 0–4-veined adaxially, ovate, plano-convex, 2.6–3.2 × 0.9–1.3 mm, 0.5–0.65 mm thick, margin unwinged, pithlike tissue usually present in proximal perigynia walls;

beak medium or dark brown at tip, often with white-hyaline, cylindric to somewhat flat, abaxial suture with conspicuous white margin, distance from beak tip to achene 1.2–1.6 mm, entire.

appressed to appressed-ascending, green to gold, conspicuously 8–14-veined abaxially, conspicuously 4–8-veined adaxially, at least 3 adaxial veins longer than achene, lanceolate to ovate, plano-convex, 5.9–8.5 × 1.5–2.2 mm, (0.5–)0.6–0.7 mm thick, margin flat, including wing 0.3–0.5(–0.6) mm wide, ciliate-serrulate at least distally;

beak red-brown or brown, often white-hyaline at tip, usually cylindric, unwinged, ± entire for 0.5–0.8 mm, occasionally flat, ± ciliate-serrulate, abaxial suture inconspicuous, distance from beak tip to achene (2.6–)3–4.1 mm.

ovate to obovate, 1.2–1.5 × 0.8–1 mm, 0.4–0.5 mm thick.

ovate, elliptic, or obovate, (1.9–)2–3 × 1.1–1.5 mm, 0.4–0.7 mm thick.

scales dark brown, usually with pale or green midstripe, ovate, 1.5–2.5(–3.5) mm, usually shorter, narrower than perigynia, margin occasionally hyaline gold, to 0.4 mm wide, apex obtuse or acute.

scales reddish brown or gold, with pale gold midstripe, lanceolate, 4.5–5.8 mm, 3/4 length of and narrower than perigynia, margin white, 0–0.15 mm wide, apex acute.

scales with white-hyaline margin 0–0.2 mm wide.

= 64