Flora of North America species comparison

15–38 cm.

curved, bluntly trigonous, 2–12 cm, smooth-angled distally.

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.

basal sheaths brown;

ligules 0.3–0.6 mm;

blades involute, ± equaling culms, 0.5–1.5 mm wide.

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.

0.5–1.2 cm;

spikes (3–)5–7, essentially indistinguishable in dense hemispheric head.

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.

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.

light brown proximally, dark brown distally, usually strongly 8–11-veined abaxially, 4–11-veined adaxially, not or little inflated, narrowly elliptic, 2.9–3.9 × 1–1.5(–1.6) mm, leathery, dull to satiny;

stipe 0.2–0.4 mm;

beak poorly defined, 0.4–0.9 mm, smooth or slightly scabrous-margined.

ovate to obovate, 1.2–1.5 × 0.8–1 mm, 0.4–0.5 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 brown to dark brown, with narrow whitish hyaline margins, ovate, conspicuously shorter than perigynia, apex ± acute to acuminate, body shiny.

0.9–1.4 mm.

= 64