Flora of North America species comparison

5–6 mm diam., nodes not swollen.

erect, terete, 3 mm diam., smooth.

round or flattened in cross section.

1, straw-colored, apex acute.

often present at culm base.

basal 1, cauline 2;

auricles 0.5 mm, apex rounded, cartilaginous;

blade 7–45 cm x 1–2 mm, terete, not scabrous.

sheaths open;

blade flat, channeled, ensiform or terete, sometimes septate, margins involute.

terminal panicles of 70–120 heads, 6–10 cm, branches ascending;

primary bract erect;

heads 3–5(–8)-flowered, obconic, 2–4 mm diam.

terminal or pseudoaxillary, monochasia or dichasia, usually with monochasial branches, cymes or 1–many heads in racemes or panicles;

bracteoles 2 or absent.

tepals dark reddish brown, lanceolate, apex acuminate to subulate tipte;

outer tepals 1.9–2.2 mm;

inner tepals 2–2.3 mm;

stamens 6, anthers 2 times filament length.

tepals (4–)6 in 2 whorls;

stamens (2–)3–6.

inserted with beak exserted, straw-colored, 1-locular, narrowly ovoid, 2.3–2.4 mm, tapering to subulate tip, valves separating at dehiscence.

1-locular or 3-locular, septicidal.

narrowly ovoid, 0.5–0.6 mm, not tailed;

body clear yellow-brown.

many, ellipsoid to ovoid, sometimes tailed.