Flora of North America species comparison

spreading to erect, leafy, obtusely triangular.

erect, leafybased, wandlike, nearly terete, multiribbed.

often exceeding inflorescences;

blades narrowly linear, proximally flat, 1–3 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 of 1–5 corymbs; leafy bracts much exceeding corymbs.

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

involucral bracts leafy, proximalmost overtopping inflorescence.

few to several, on ascending, stiff, short-to-elongate branches, red-brown to brown, lanceoloid, (5–)6–10 mm, apex acuminate;

fertile scales many, ovate, shallowly convex, 5 mm, apex acuminate;

midrib short-excurrent or not.

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

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

perianth absent.

perianth bristles 6, exceeding fruit body, antrorsely barbellate.

1.5 mm;

body dark brown to black, tumidly lenticular, nearly orbicular, 0.8–0.9 × 0.6–0.7 mm, margins grooved, discontinuous with tubercle;

surfaces transversely wavyrugose, ridges of contiguous rows of vertical, linear, raised cells;

tubercle broad, low triangular, 0.2–0.3 mm, crustaceous, base capping fruit summit, raised at ends, apex shortacuminate.

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.