Flora of North America species comparison

usually tuberous, 2–4 mm diam.

1–many, occasionally becoming decumbent.

erect, terete, 1–3 mm diam., smooth.

0–2.

0–1.

basal and cauline;

auricles rudimentary or absent;

blade flat, 3–13 cm × 0.3–1.1 mm.

basal 1–2, cauline 2–3, green;

auricles 1–2 mm, apex rounded, membranaceous;

blade terete, 2–23 cm × 1–2 mm, distal cauline leaf blade 1.6–26 cm, equaling or longer than sheath.

loose and diffuse or less often compact, usually at least ½1/2 total height of plant;

primary bract shorter than inflorescence.

terminal panicles of 1–23(–32) heads, 2.5–9 cm, branches ascending to erect;

primary bracts erect;

heads 20–60-flowered, spheric or usually lobed, 6–11 mm diam.

bracteoles 2;

tepals greenish, lanceolate, 3.8–7(–8.5) mm;

inner series slightly shorter, apex sometimes obtuse;

stamens 3–6, filaments (0.7–)1–1.8 mm, anthers 0.3–0.8 mm;

style 0.1–0.2 mm.

tepals green to straw-colored, lance-subulate, 2–3.5 mm, nearly equal, apex acuminate;

stamens 3, anthers 1/3 filament length.

tan to reddish brown, 3-locular, ellipsoid to narrowly so, slightly truncate, 2.7–4 × 1–1.5 mm, sometimes exceeding inner tepals but usually not outer series.

exserted, straw-colored, 1-locular, lance-subulate, 3–4 mm, apex tapering, remaining attached at tip, valves not separating at dehiscence, fertile throughout or only proximal to middle.

yellowish, widely ellipsoid to ovoid, 0.26–0.49, not tailed.

oblong, 0.4 mm, not tailed;

body clear yellow-brown.

= 27–37, 58–81, 108–115.