Flora of North America species comparison

erect or ascending, leafy, trigonous.

erect, leafybased, wandlike, nearly terete, multiribbed.

exceeded by culm;

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

ascending or erect, longest nearly equaling culm;

principal blades linear, involutecylindric, to 3 mm wide, apex tapering, subulate.

terminal and axillary;

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

terminal, heads 1–4, dense, macelike, 1–1.5 mm thick;

involucral bracts leafy, proximalmost overtopping inflorescence.

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

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

greenish, lanceovoid, 5–6 mm, apex acuminate;

fertile scales boat-shaped, 5 mm, apex acute to shortacuminate, midrib slightly excurrent or not.

perianth bristles mostly 6, exceeding tubercle tip.

perianth bristles 6, exceeding fruit body, 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 per spikelet, 6–8(–8.7) mm;

body pale greenbrown, laterally compressed, obcordiform, 2.5–3(–4) mm, margins thick, rounded, not crimped, apex barely exserted, setulose, surfaces nearly plane, minutely cancellate (latticed);

tubercle (style base) linear, angled, 4–6 mm, much narrower than fruit summit, setulose.