Flora of North America species comparison

stiffly erect, leafy, triangular, multiribbed.

erect to arching, leafy, trigonous, slender, firm.

ascending, overtopped by inflorescence;

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

overtopped by culms;

blades linear, proximally flat, 3–7 mm wide, apex trigonous, subulate, tapering.

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

bracteal leaves mostly exceeding subtended compounds.

spikelet clusters 2–6, sparse, widely spaced, turbinate;

peduncles and branches ascending; leafy bracts exceeding proximal clusters.

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

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

light redbrown, ovoid to ellipsoid, (4–)5–8(–9) mm, apex acute or acuminate;

fertile scales ovate, (5.5–)6–6.5(–7) mm, midrib included or shortexcurrent.

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

perianth bristles 6(–8), mostly reaching from fruit midbody to tubercle base, antrorsely barbellate.

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.

1–2 per spikelet, (3.5–)4–5 mm;

body dark brown to mahogany or nearly black, broadly obovoid, tumid, nearly smooth, buttressed to tubercle;

tubercle lowconic, rimmed, 0.7(–1) mm, apex apiculate.

= 18.