Flora of North America species comparison

5–6 mm diam., nodes not swollen.

short, knotty.

erect, terete, 3 mm diam., smooth.

compressed.

1, straw-colored, apex acute.

basal 1, cauline 2;

auricles 0.5 mm, apex rounded, cartilaginous;

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

basal and cauline;

auricles 0.5–1.5 mm, apex rounded, membranous;

basal blade flat, 20–4.5 dcm × 1.5–5 mm, cauline reduced.

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

primary bract erect;

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

glomerules, (2–)5–200, each with (1–)2–10(–20) flowers, mostly open, 3–10(–15) cm;

primary bract shorter than inflorescence.

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 dark brownish, usually with green midstripe, outer series ovate-lanceolate, 1.8–3.2 mm, margins broad, clear, awned or not, apex acutish;

inner series ovate to lanceolate, 2–3.5 mm, slightly longer than outer series, apex obtuse to acute, awned or not;

stamens 3, opposite outer tepals, shorter to longer than tepals, filaments 1.1–2.5 mm, anthers 0.3–1.2 mm;

style 0.3 mm.

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

brown and sometimes dark spotted, 3-locular, obovoid to nearly globose, 1.8–2.9 mm, shorter to longer than perianth.

narrowly ovoid, 0.5–0.6 mm, not tailed;

body clear yellow-brown.

yellow to light brown, fusiform, 0.4–0.7 mm, not tailed.

= 38, 40.