Flora of North America species comparison

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

usually 1, erect, glabrous, short hispido-strigose in arrays.

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 and proximal cauline tapering to long petioles that partially sheath stems;

blades oblanceolate, 100–350 × 5–60 mm, margins subentire to serrate, apices acute;

mid to distal sessile, not sheathing stems, blades lanceolate, 20–50 × 5–10 mm, much reduced distally, margins entire.

1–4 mm, finely strigilloso-villous;

bracteoles 0–2, linear, grading into phyllaries.

1–4 mm, glabrous or sparsely strigose.

narrowly campanulate, 2.5–3.5 mm.

3–5 mm.

2–8;

laminae 1–2 × 0.25–0.5 mm.

1–8 (moderately conspicuous);

laminae 3.2–3.7 × 0.4–0.6 mm.

2–4(–6);

corollas 2.3–3.5 mm, lobes 0.4–1 mm.

6–8;

corollas 4.6–5 mm, lobes 0.6–1 mm.

in 3–4 series, strongly unequal;

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

(14–18) in 3–5 series, unequal, usually apically ciliate;

outer ovate, acute, inner linear-oblong, obtuse.

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

35–230 in elongate paniculiform arrays, sometimes narrow and secund pyramidal, usually narrowly to broadly, non-secund thyrsiform;

branches strongly ascending with non-secund heads to arching with heads secund.

(narrowly obconic) 1 mm, strigillose;

pappi 2–3 mm.

1–2 mm, glabrous or sparsely strigillose;

pappi 2.7–3 mm (weakly clavate).

= 18.

= 18, 36.