Flora of North America species comparison

2–3 mm diam., not swollen.

erect, terete, 2–4 mm diam., smooth or rugulose.

round or flattened in cross section.

1–2, pink to straw-colored, apex acute.

often present at culm base.

basal 1–2, cauline 1–2;

auricles 1–4.9 mm, , apex rounded, membranaceous;

blade green to straw-colored, terete, 20–30 cm × 1.5–4 mm, rugulose or smooth.

sheaths open;

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

terminal panicles of 25–66 heads, 7–13 cm, branches spreading;

primary bract erect;

heads 6–10-flowered, hemispheric to obovoid, 5–10 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 straw-colored to brown, lanceolate, apex acuminate;

outer tepals (2–)2.5–3.4 mm;

inner tepals (2–)2.6–3.6 mm;

stamens 6, anthers 1.5–2 times filament length.

tepals (4–)6 in 2 whorls;

stamens (2–)3–6.

exserted, chestnut brown, 1-locular, subuloidsubulate, (2.4–)3–3.9 mm, apex tapering to subulate tip, valves separating at dehiscence.

1-locular or 3-locular, septicidal.

obovoid, 0.3–0.4 mm, not tailed.

many, ellipsoid to ovoid, sometimes tailed.

= 40.