Flora of North America species comparison

15–38 cm.

20–35 cm, distally scabrous.

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.

blades 2–3 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.

proximal bracts shorter than inflorescences;

spikes erect, distinct, short-pendunculate, oblong, 10–15 × 5–8 mm;

lateral 2–3 spikes pistillate, of similar length;

terminal spike staminate, androgynous, or gynecandrous.

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.

ascending, pale green, veined or veinless, elliptic, 2.5–3 × 1.25–1.75 mm, papillose, especially along distal margins;

beak to 0.2 mm, bidentate.

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

nearly filling body of perigynia.

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 dark brown, lanceolate, mostly shorter than, also equaling or longer (if longer then without long mucro typical of C. buxbaumii) and as broad as perigynia, midvein lighter colored than body, conspicuous apex acuminate or mucronate, mucro less than 0.5 mm.

= 64

= 106.