Flora of North America species comparison

slender, ± filiform, leafy, terete to bluntly trigonous.

stiffly erect, leafy, triangular, multiribbed.

shorter than culm;

blades spreading to ascending, ± filiform, proximally flat, 0.5–1(–1.5) mm, apex tapering, trigonous.

ascending, overtopped by inflorescence;

blades flat proximally, 3–10(–15) mm wide, apex attenuate, trigonous.

spikelet clusters 1–3, loose to dense, widely spaced to close together, turbinate to hemispheric; leafy bracts setaceous, mostly exceeding spikelet clusters.

terminal and axillary, narrow, clusters of corymbs, clusters dense, mostly broadly turbinate, 13–15 mm;

bracteal leaves mostly exceeding subtended compounds.

dark redbrown, lanceovoid, 2.5–3.5(–4) mm, apex acute;

fertile scales ovate, 2–3.5 mm, apex acute or acuminate, rarely minutely awned.

brown, lanceoloid, 13–15 mm, apex acuminate;

fertile scales lanceolate, 10–13 mm, apex acuminate, midrib shortexcurrent.

bristles 6, of various length, mostly extending from fruit midbody to tubercle base, antrorsely barbellate.

longer perianth bristles usually fully 2 times length of fruit body, antrorsely barbellate.

1–2 per spikelet, (2–)2–2.5 mm;

body brown with pale center, lenticular, broadly ellipsoid, 1.5–1.7 × 1.2–1.3 mm, surfaces nearly smooth or very finely cancellate;

tubercle flat, triangular with short-oblong, blunttipped nose, or triangularsubulate, 0.5–0.8 mm.

1–2 per spikelet, 20–25 mm;

body pyriformobovoid, compressed, 5–6 × 2.6–3.6 mm;

tubercle attenuate, 2-grooved, (15–)18–20(–21) mm.

= 18.