Flora of North America species comparison

1 or, usually, multiple, clustered, densely tomentose to glabrescent.

1, glabrous or leaf axils tomentose.

(soon withering), petiolate;

blades lyrate (lateral lobes 2–6+ pairs), ovate, obovate, or spatulate, 70–100+ × 20–30+ mm, bases tapering, ultimate margins irregularly and coarsely serrate-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, proximal and mid similar to basal, terminal lobes smaller than laterals; distal sessile, incised).

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

bracteate, sparsely to densely lanate-tomentose.

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

8 or 13;

corolla laminae 10–15 mm.

8–10+;

corolla laminae 10–15+ mm.

35–50+;

corolla tubes 3.5–4.5 mm, limbs 2.5–3.5 mm.

45–60+;

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

13 or 21, green (tips sometimes yellow), 8–10+ mm, densely tomentose proximally, glabrescent distally.

13 or 21, green, 7–9+ mm, glabrous.

inconspicuous (bractlets tomentose).

inconspicuous.

5–20+ in open or compact (rarely), cymiform arrays.

15–50+ in corymbiform arrays.

1–1.5 mm, glabrous;

pappi 6–7 mm.

2–2.5 mm, glabrous;

pappi 6–7 mm.

= 46.

= 46.