Flora of North America species comparison

1–10, ascending to erect, uniformly finely strigillose-villous distal to mid.

1–5+, ascending to erect, slender, essentially glabrous;

axillary clusters of small leaves present in distal leaf axils.

basal cauline nearly always withering well before flowering, linear-oblanceolate, smaller than proximal mid cauline, serrate;

proximal persisting, sometimes brown-black after senescence, often twisted;

proximal to distal numerous (100+ on tall stems), crowded, sessile, blades (bright green) linear to linear-lanceolate, 20–70 × 2–7(–10) mm, margins remotely serrulate (proximal) to entire or with 1–2 minute serrations (distal), obscurely 3-nerved, one or both faces glabrous or finely strigillose.

basal often withering by flowering, tapering to petiolar bases, blades oblanceolate, largest blades 80–170 × 10–20 mm, margins entire or slightly toothed, ± strongly 3-nerved, apices acute;

mid and distal cauline ascending to erect, blades linear-lanceolate, greatly reduced, becoming bractlike in arrays, less prominently or scarcely 3-nerved, glabrous.

1–4 mm, finely strigilloso-villous;

bracteoles 0–2, linear, grading into phyllaries.

1–3(–5) mm;

bracts linear-lanceolate, 1–3 mm, glabrous.

narrowly campanulate, 2.5–3.5 mm.

campanulate, 3–5 mm.

2–8;

laminae 1–2 × 0.25–0.5 mm.

5–8;

laminae 1–2 × 0.5–0.75 mm.

2–4(–6);

corollas 2.3–3.5 mm, lobes 0.4–1 mm.

3–9;

corollas 3–4 mm, lobes 0.5–0.75 mm.

in 3–4 series, strongly unequal;

outer ovate, acute, inner oblong, obtuse to rounded.

in 3 series, strongly unequal, broadly lanceolate, acute, glabrous.

100–300+, in short to elongate, pyramidal paniculiform arrays, branches recurved, secund.

35–140, in paniculiform arrays, often about as broad as long, branches recurved-secund, often elongate.

(narrowly obconic) 1 mm, strigillose;

pappi 2–3 mm.

(obconic) 1.5–2 mm, glabrous;

pappi 1.5–2 mm.

= 18.

= 18.