Flora of North America species comparison

stiffly erect, leafy, triangular, multiribbed.

ascending, overtopped by inflorescence;

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

exceeded by culm;

blades lax, linear, proximally flat, 3–5 mm wide, apex abruptly narrowed, trigonous, subulate.

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

bracteal leaves mostly exceeding subtended compounds.

spikelet clusters 4–6, mostly widely spaced;

peduncles erect or ascending, slender;

branches capillary, divaricate, or widely spreading, to small clusters of 1–few spikelets; leafy bracts mostly exceeding clusters.

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

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

lanceovoid, 3–4(–6) mm, apex acute to acuminate;

fertile scales elliptic, 2.5 mm, apex acute, midrib forming mucro or awn.

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

perianth bristles 6, overtopping tubercle, 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.

mostly 2–4(–several) per spikelet, (1.5–)1.8–2(–2.1);

body greenish or pale brown, broadly ellipsoid to narrowly obovoid, lenticular, 1.2–1.5 × 1–1.2 mm;

surfaces transversely finely wavy-rugulose, intervals vertically striatealveolate, or alveolae isodiametric;

tubercle flat, triangular-subulate, 0.5–0.6(–0.8) mm.

= 18.