Flora of North America species comparison

erect or ascending, slender, leafy proximal to middle, somewhat stiff.

stiffly erect, leafy, triangular, multiribbed.

overtopped by culm;

blades ascending, ± filiform, proximally flat or slightly concave, to 1 mm wide, apex narrowing, trigonous, abruptly blunt.

ascending, overtopped by inflorescence;

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

spikelet clusters 1–2, if 2 then close together, dense, broadly turbinate to hemispheric or even globose;

primary leafy bract setaceous, exceeding clusters.

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

bracteal leaves mostly exceeding subtended compounds.

redbrown, ovoid, 2–2.5(–4) mm, apex acute;

fertile scales broadly ovate, 1.5–1.9(–2) mm, apex acute to acuminate, midrib excurrent as awn to 0.5 mm.

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

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

bristles 6, some reaching to apex of fruit body.

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

2–3 per spikelet, 1–1.2(–1.4) mm;

body dull dark brown with paler brown center, lenticular, broadly obovoid to broadly ellipsoid, 1 × 0.8 mm, margins narrow, flowing to tubercle;

tubercle nearly equilaterally triangular, 0.2–0.3 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.