Flora of North America species comparison

erect or ascending, leafy, trigonous.

erect or ascending, leafy, nearly terete or obscurely angular, many-ribbed, stiff.

exceeded by culm;

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

exceeding or exceeded by inflorescences;

blades linear, proximally flat, 1–5 mm wide, apex trigonous, tapering.

terminal and axillary;

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

terminal and axillary, clusters of corymbs 1–5, diffuse, branches ascending to divaricate; leafy bracts much exceeding axillary corymbs.

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

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

redbrown to dark brown, ovoidlanceoloid, 3–6(–7) mm, apex acute;

fertile scales several, narrowly ovate, 2.5–3.5 mm, apex narrowly acute;

midrib included or shortexcurrent.

perianth bristles mostly 6, exceeding tubercle tip.

perianth absent.

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.

1.3–1.5 mm;

body brown to blackish, tumidly lenticular, nearly orbicular, 0.6–1 × 0.6–1 mm, margins distinct, narrow, flowing into base of tubercle;

tubercle flat, narrowly triangular, at least 0.5 mm high, base broadly 2-lobed, apex acuminate.