Flora of North America species comparison

1 or multiple, clustered, usually glabrous, rarely sparsely floccose-tomentose, leaf axils sometimes tomentose.

1, glabrous or leaf axils tomentose.

(and proximal cauline, relatively thick and turgid) petiolate;

blades lanceolate or narrowly oblanceolate, 20–40+ × 5–15 mm, bases tapering, margins usually entire, sometimes sub-pinnatisect (apices subentire or dentate).

(and proximal cauline) petiolate;

blades spatulate to obovate (pinnately lobed, terminal lobes ovate to oblong, lateral lobes 2–6+ pairs, smaller, midribs narrowly winged), 100–300+ × 20–50(–80+) mm, bases contracted to tapering, ultimate margins crenate or dentate to lacerate (faces glabrous).

gradually reduced (± petiolate or sessile).

gradually reduced (petiolate or sessile; obovate, irregularly incised to subpinnate, terminal lobes narrow).

bracteate, glabrous or sparsely tomentose.

usually ebracteate (rarely with 1–2 bractlets), glabrous.

8–10(–13);

corolla laminae 5–8+ mm.

8–10+;

corolla laminae 10–15+ mm.

45–60+;

corolla tubes 3–3.5 mm, limbs 4–5 mm.

45–60+;

corolla tubes 3–3.5 mm, limbs 4–4.5 mm.

13 or 21, green, 6–10 mm, sparsely tomentose proximally, glabrous distally.

13 or 21, green, 7–9+ mm, glabrous.

inconspicuous.

inconspicuous.

4–15+ in corymbiform arrays.

15–50+ in corymbiform arrays.

1.5–2.5 mm, glabrous or sparsely hirtellous on ribs;

pappi 5–6 mm.

2–2.5 mm, glabrous;

pappi 6–7 mm.

= 46.

= 46.