Flora of North America species comparison

erect or ascending, leafy, trigonous.

erect to excurved, lax, filiform, leafy, ± terete.

exceeded by culm;

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

exceeded by culm, ascending;

blades filiform, ± terete, margins strongly involute, apex trigonous, sulcate, tapering.

terminal and axillary;

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

spikelet clusters mostly 2–3, sparse to dense, oblong to broadly or narrowly turbinate; leafy bracts setaceous, exceeding clusters.

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

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

pale redbrown, lanceoloid, 3–3.5 mm, apex acute;

fertile scales mostly elliptic, 2–2.5 mm, apex acute, sometimes apiculate.

perianth bristles mostly 6, exceeding tubercle tip.

bristles mere nubs or 1–2, to 0.3 mm.

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.

mostly 2 per spikelet, 1.5–1.6 mm;

body redbrown with pale center, lenticular, broadly obovoid to orbicular, margins pale, narrow, flowing to tubercle;

surfaces smoothish, or faintly cancellate;

tubercle flattened, triangularsubulate, 0.3–0.5 mm.