Flora of North America species comparison

erect or ascending, leafy, trigonous.

erect or ascending, leafy, trigonous, slender.

exceeded by culm;

blades linear, proximally 4–7 mm wide, apex trigonous, tapering.

all exceeded by culm;

basal blades spreading, often curled, distal longer, all proximally flat, 3–5 mm wide, apex trigonous, subulately tapering.

terminal and axillary;

clusters 3–6, mostly dense, narrowly to broadly turbinate, branches ascending; leafy bracts exceeeding proximalmost inflorescences.

clusters 3–5, proximalmost distant, longest pedunculate, fascicles broadly turbinate to hemispheric; leafy bracts of distal groups mostly exceeded by inflorescence.

rich brown, ovoid, (3–)4–5 mm, apex acuminate;

fertile scales ovate, 2.5–3.5 mm, apex acuminate, midrib included or shortexcurrent.

lanceovoid, (3.5–)4–5 mm;

fertile scales broadly ovate to ± orbiculate, cupulate, rounded, 3 mm, apex apiculate to cuspidate, midrib excurrent.

perianth bristles mostly 6, exceeding tubercle tip.

perianth bristles 6, overtopping tubercle (or at least its base), antrorsely barbellate.

mostly 3–4 per spikelet, 2–2.2 mm;

body brown on short pedicellar (to 0.3 mm) stalk, broadly obovoid, lenticular, 1.3–1.5 × 1–1.5 mm, surfaces transversely rugulose, vertically finely striate and rectangularalveolate;

tubercle compressed, triangular acuminate, 0.5–0.8 mm, edges setulose.

1–3 per spikelet, 2.3–3 mm;

body brown, strongly compressed proximally, biconvex distally, broadly obovoid, 1.8–2.2 × 1.5 mm;

surfaces strongly transversely rugose, intervals with rows of narrow, vertical alveolae;

tubercle triangular, flat, 1 mm, base lunate, capping fruit apex, apiculate.