Flora of North America species comparison

1–10+, erect, glabrous.

1 usually, erect, round, proximally glabrous, strigose in arrays.

basal and proximal cauline usually withering by flowering (other rosettes may be present), tapering to long, winged petioles, blades often recurved, linear- lanceolate or -oblanceolate, 100–240 × 8–16 mm, folded along midrib (V-shaped in cross section), bases usually with (2–)3–8 prominent lateral nerves, apices acute to obtuse, faces glabrous;

mid to distal cauline sessile, blades recurved, linear-lanceolate, 50–70 × 8–11 mm, reduced distally, folded, bases with prominent lateral nerves.

basal and proximal cauline tapering abruptly to winged, thin petioles, blades broadly ovate, 100–300 × 30–100 mm, margins sharply serrate, apices acute to acuminate, adaxial faces glabrous or slightly scabrous, or sometimes strigose or strigillose;

mid to distal cauline sessile, lanceolate, 50–72 × 10–14 mm, reduced distally, becoming entire.

2.8–4 mm, moderately short-hispido-strigose, lanceolate bracteoles 0–1.

1.5–3 mm, glabrous or moderately short hispido-strigose, bracteoles 1–5, lanceolate-oblong, often grading into phyllaries.

narrowly campanulate, 4.5–6 mm.

2.5–4.5(–5) mm.

7–9;

laminae 4.5–5.5 × 0.4–0.5 mm.

2–8;

laminae 4–4.5 × 0.4–0.6 mm.

6–10;

corollas 4.5–5.2 mm, lobes 0.7–1.8 mm.

8–20;

corollas 3.5–4 mm, lobes 0.6–1.5 mm.

(14–18) in 3–4 series, unequal, obtuse, broad, striations weak, obtuse to rounded, glabrous.

in 3–4 series, unequal;

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

30–450 in corymbiform to somewhat paniculiform with rounded corymbiform branches (robust plants) arrays, branches and peduncles strigillose.

25–250, secund, in open, leafy, paniculiform arrays with recurved branches (sometimes elongate), branches and peduncles hairy.

1.5–2.2 mm, glabrous;

pappi 3.5–4 mm (apically clavate).

1.5–2 mm, distinctly ridged, glabrous or strigose distally;

pappi 3–3.5 mm.

= 18.